Where is the Allen-Bradley SMC Flex fault codes PDF?

The SMC Flex fault codes are in Rockwell's SMC Flex Soft Starters User Manual, publication 150-UM008 (revision J, April 2025), on literature.rockwellautomation.com. Chapter 8 has Table 42, the fault code cross-reference (PDF page 100), and Table 43, the fault definitions (PDF page 101); chapter 9 has Table 44 with possible causes and solutions for each code (PDF pages 104 and 105). Codes run from 1 (Line Loss A) to 49 (Input 2), plus system faults 128 to 209.

What are the Allen-Bradley SMC-3 fault codes?

The SMC-3 has no display. Its RUN/FAULT LED flashes a number of times for each fault: 1 Overload, 2 Overtemperature, 3 Phase Reversal, 4 Phase Loss/Open Load, 5 Phase Imbalance, 6 Shorted SCR and 7 Test. Fault contact 97/98 changes state at the same time. An overload resets with the Reset/Test button or automatically below 75% thermal capacity, depending on DIP switch 13; every other fault resets by cycling control power.

How do I clear a fault on an SMC Flex soft starter?

Fix the cause first, then clear it with Clear Fault in Main Menu/Diagnostics/Faults, by holding Esc on the keypad for 3 seconds (firmware 6.001 or later), with the Stop button of a connected HIM, with a reset push button wired to Option Input #2 programmed for Clear Fault, or by cycling control power. An overload fault cannot be reset until Motor Thermal Usage (parameter 12) is below 75%.

What does Open Bypass (fault 13, 14 or 15) mean on an SMC Flex?

The SMC Flex did not sense the power pole bypass contact closing on phase A, B or C. Rockwell lists low control voltage and an inoperable power module bypass as causes. Check the control voltage supply, check that control module connectors TB2 to TB4 and TB5 to TB7 are connected and secure, make sure no Aux 1 to 4 output is set to External Bypass, and replace the power module if the bypass has failed. On the SMC-50 the same fault is codes 11, 12 and 13.

What do SMC-50 fault codes like 7026 or 8030 mean?

On the SMC-50, a four digit code puts the control module port number (7, 8 or 9) in front of the fault code. 7026 is Exp Removed for the module in port 7 (an expansion module was removed or is loose), x027 is Exp Incompat, x028 is Expansion, and 7030 or 8030 is a CT Loss from a 150-SM2 module with external CTs. Ground Fault and Motor PTC from a 150-SM2 show as x058 and x059. The full list is in Tables 129 to 131 of the SMC-50 user manual, 150-UM011.

What does Line Loss mean on an Allen-Bradley SMC soft starter?

On the SMC Flex and SMC-50, codes 1, 2 and 3 (Line Loss A, B, C) mean the line connection on that phase was lost: check for a blown fuse, open line leads, loose line and load connections and the power quality. On the SMC Flex only, codes 41, 42 and 43 use the same names for discontinuous SCR conduction, caused by line distortion or a high impedance connection. The older SMC Dialog Plus splits this into Power Loss (F1 to F3, phase missing) and Line Fault (F11 to F13 before the start, F15 while running).

Allen-Bradley SMC Fault Codes (Flex, SMC-50)

Code	Name
1	Line Loss A
4	Shorted SCR A
7	Open Gate A
10	PTC Pwr Pole (SMC Flex)
11	SCR Overtemp (SMC Flex)
12	Motor PTC (SMC Flex)
13	Open Bypass A (SMC Flex)
16	No Load A (SMC Flex)
19	Line Unbalance (SMC Flex)
20	Overvoltage (SMC Flex)
21	Undervoltage (SMC Flex)
22	Overload (SMC Flex)
23	Underload (SMC Flex)
24	Jam (SMC Flex)
25	Stall (SMC Flex)
26	Phase Reversal (SMC Flex)
27	Coms Loss P2 (SMC Flex)
30	Network P2 (SMC Flex)
33	Ground Fault (SMC Flex)
34	Excess Starts (SMC Flex)
35	Power Loss A (SMC Flex)
38	Hall ID (SMC Flex)
39	NVS Error (SMC Flex)
40	No Load (SMC Flex)
41	Line Loss A (SMC Flex)
44	V24 Recovery (SMC Flex)
45	V24 Loss (SMC Flex)
46	V Control Loss (SMC Flex)
48	Input 1 (SMC Flex)
128-209	System Faults (SMC Flex)
10	SCR Overtemp (SMC-50)
11	Open Bypass A (SMC-50)
14	No Load (SMC-50)
15	Open Load A (SMC-50)
18	Voltage Unbalance (SMC-50)
19	Overvoltage (SMC-50)
20	Undervoltage (SMC-50)
21	Overload (SMC-50)
22	Underload (SMC-50)
23	Jam (SMC-50)
24	Stall (SMC-50)
25	Phase Reversal (SMC-50)
26	Exp Removed (SMC-50)
27	Exp Incompat (SMC-50)
28	Expansion (SMC-50)
29	Starts per Hour (SMC-50)
30	CT Loss A (SMC-50)
33	HAL ID (SMC-50)
34	NVS Error (SMC-50)
36	V24 Loss (SMC-50)
37	VControl Loss (SMC-50)
38	TB Input 1 (SMC-50)
42	Current Imbal (SMC-50)
43	Under Power Real (SMC-50)
44	Over Power Real (SMC-50)
49	Frequency (SMC-50)
50	PM Hours (SMC-50)
51	PM Starts (SMC-50)
52	Power Quality A (SMC-50)
55	Power Quality THD V (SMC-50)
56	Power Quality THD I (SMC-50)
57	Config Change (SMC-50)
58	Ground Fault (SMC-50)
59	Motor PTC (SMC-50)
60	Power Pole PTC (SMC-50)
61	I/O Config (SMC-50)
62	Test Fault (SMC-50)
69	RTC Battery Low (SMC-50)
70	Locked Rotor (SMC-50)
100-199	System Faults (SMC-50)
F1 / F30	Power Loss, A (SMC Dialog Plus)
F4	Undervoltage (SMC Dialog Plus)
F5	Overvoltage (SMC Dialog Plus)
F6	Stall (SMC Dialog Plus)
F7	Overload (SMC Dialog Plus)
F8	Controller Temp. (SMC Dialog Plus)
F9	Underload (SMC Dialog Plus)
F10	Volt Unbalance (SMC Dialog Plus)
F11 / F26	Line Fault, A (SMC Dialog Plus)
F15 / F29	Line Fault (SMC Dialog Plus)
F16	Phase Reversal (SMC Dialog Plus)
F19	Jam (SMC Dialog Plus)
F20	Curr Fdbk Loss (SMC Dialog Plus)
F21	Comm Fault (SMC Dialog Plus)
F23	Open Gate, A (SMC Dialog Plus)
F64	Excess Starts/Hr. (SMC Dialog Plus)
F128-138	System Faults (SMC Dialog Plus)
1 flash	Overload (SMC-3)
2 flashes	Overtemperature (SMC-3)
3 flashes	Phase Reversal (SMC-3)
4 flashes	Phase Loss/Open Load (SMC-3)
5 flashes	Phase Imbalance (SMC-3)
6 flashes	Shorted SCR (SMC-3)
7 flashes	Test (SMC-3)

Fault 1: Line Loss A

Hits OEE: Availability

What it means: The controller lost the line connection on phase A. On the SMC Flex it is a prestart fault indication; the SMC-50 checks for it before the start and while running.^[1]^[2]

Also on: Starters: SMC Flex (Bulletin 150-F), SMC-50 (Bulletin 150). Controllers: SMC Flex, SMC-50. Codes 2 and 3 are Line Loss B and Line Loss C on both. On the SMC Flex, codes 41, 42 and 43 carry the same names but mean discontinuous SCR conduction (separate row). On an SMC-50 with a 150-SM6 module this is red LED code 1. SMC Dialog Plus shows a lost phase as Power Loss (F1 to F3) or Line Fault (F11 to F13).

Starter response: SMC Flex: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power. SMC-50: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Missing supply phase, for example a blown fuse
Motor not connected properly
High impedance line connection (SMC-50)
Unstable incoming 3-phase voltage (SMC-50)

First checks, in this order

Check line and load connections for looseness.
Check for an open line, for example a blown fuse.
Check for open line leads.
Verify the power quality.
On the SMC-50 this fault/alarm can be disabled; Rockwell lists that as the last option.

Fault 4: Shorted SCR A

Hits OEE: Availability

What it means: A shorted SCR was found on phase A, so starting is prohibited. The SMC-50 checks for current flow in each phase during prestart checks; in wye connections a single shorted SCR is found only once the unit starts.^[1]^[2]

Also on: Starters: SMC Flex (Bulletin 150-F), SMC-50 (Bulletin 150). Controllers: SMC Flex, SMC-50. Codes 5 and 6 are Shorted SCR B and Shorted SCR C on both. SMC-50 150-SM6: red LED code 1. On the SMC-3 a shorted SCR is LED code 6 (separate row).

Starter response: SMC Flex: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power. SMC-50: always enabled, no time delay, no auto restart; clear after repair with the HOLD TO TEST, PUSH TO RESET button, an option input set to Clear Fault or a control power cycle.

Likely causes

Shorted power module (SCR)

First checks, in this order

Check for a shorted SCR with a resistance check (SMC-50 manual, page 215).
Replace the power module if needed.

Fault 7: Open Gate A

Hits OEE: Availability

What it means: The controller sensed faulty SCR firing on phase A, for example an open SCR gate, during the start (SMC-50: during start or stop). The SMC Flex tries to start the motor three times before it shuts down.^[1]^[2]

Also on: Starters: SMC Flex (Bulletin 150-F), SMC-50 (Bulletin 150). Controllers: SMC Flex, SMC-50. Codes 8 and 9 are Open Gate B and Open Gate C on both. SMC-50 150-SM6: red LED code 2. SMC Dialog Plus uses F23 to F25 for Open Gate.

Starter response: SMC Flex: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power. SMC-50: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Open gate circuit
Loose gate lead

First checks, in this order

Do a resistance check and replace the power module if needed.
Check the gate lead connections to the control module (SMC-50: remove the control module and check that TB5, TB6 and TB7 are firmly seated).
On the SMC-50 this fault/alarm can be disabled; Rockwell lists that as the last option.

Fault 10: PTC Pwr Pole (SMC Flex)

Hits OEE: Availability

What it means: The power pole temperature in one of the phases rose above the set limit, measured by the power pole PTC. It can be reset once the temperature falls below that level.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Table 44 prints it as PTC Power Pole and groups it with SCR Overtemp (code 11). On the SMC-50, code 10 is SCR Overtemp and code 60 is Power Pole PTC.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Controller ventilation blocked
Controller duty cycle exceeded
Cooling fan failure
Ambient temperature limit exceeded
Failed thermistor
Failed power or control module

First checks, in this order

Check that the controller has proper ventilation.
Check the application duty cycle.
Check that the fan runs; replace it if needed.
Wait for the controller to cool, or add external cooling.
Replace the power module or control module as needed.

Fault 11: SCR Overtemp (SMC Flex)

Hits OEE: Availability

What it means: The SCRs in the power section overheated and the controller tripped to protect them.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. On the SMC-50 the same name is code 10, and code 11 is Open Bypass A.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Controller ventilation blocked
Controller duty cycle exceeded
Cooling fan failure
Ambient temperature limit exceeded
Failed thermistor
Failed power or control module

First checks, in this order

Check that the controller has proper ventilation.
Check the application duty cycle.
Check that the fan runs; replace it if needed.
Wait for the controller to cool, or add external cooling.
Replace the power module or control module as needed.

Fault 12: Motor PTC (SMC Flex)

Hits OEE: Availability

What it means: The motor PTC wired to terminals 23 and 24 tripped. The PTC parameter (79, PTC Enable) must be enabled for this fault.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. On the SMC-50, Motor PTC is code 59 (x059 with a 150-SM2 module) and code 12 is Open Bypass B.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Motor ventilation blocked
Motor duty cycle exceeded
PTC open or shorted

First checks, in this order

Check the motor ventilation.
Check the application duty cycle.
Wait for the motor to cool or provide external cooling.
Check the resistance of the PTC.

Fault 13: Open Bypass A (SMC Flex)

Hits OEE: Availability

What it means: The controller did not sense the power pole bypass contact closing on phase A.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 14 and 15 are Open Bypass B and Open Bypass C. On the SMC-50, Open Bypass is codes 11 to 13 and code 13 means Open Bypass C.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Low control voltage
Inoperable power module bypass
An auxiliary contact set to External Bypass

First checks, in this order

Check the control voltage supply.
Check that control module connectors TB2 to TB4 and TB5 to TB7 are connected and secure.
Check that Aux 1, 2, 3 and 4 are not configured as External Bypass.
Replace the power module if the bypass has failed.

Fault 16: No Load A (SMC Flex)

Hits OEE: Availability

What it means: The load connection on phase A has been lost.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 17 and 18 are No Load B and No Load C; code 40 is No Load without a phase (separate row). On the SMC-50, code 16 is Open Load B.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Loss of load side power wiring

First checks, in this order

Check all load side power connections.
Check the motor windings.

Fault 19: Line Unbalance (SMC Flex)

Hits OEE: Availability

What it means: The calculated supply voltage unbalance reached the trip percentage you programmed (Vu = 100 x Vd / Va). The protection is off during braking.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 calls this Voltage Unbalance (code 18); SMC Dialog Plus calls it Volt Unbalance (F10).

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Supply voltage unbalance greater than the programmed value
Delay time too short for the application

First checks, in this order

Check the power system and correct it if needed.
Extend the delay time to suit the application (it must be above zero when the protection is enabled).

Fault 20: Overvoltage (SMC Flex)

Hits OEE: Availability

What it means: The average supply voltage rose above the overvoltage trip level, set as a percentage of the programmed line voltage. The protection is off during braking.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Overvoltage is code 19; SMC Dialog Plus is F5. On the SMC-50, code 20 is Undervoltage.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Supply voltage higher than the programmed value
Abnormal voltage regulation
Settings or delay time not suited to the application

First checks, in this order

Check the power system and correct it if needed.
Correct the programmed level or delay time.

Fault 21: Undervoltage (SMC Flex)

Hits OEE: Availability

What it means: The average supply voltage fell below the undervoltage trip level, set as a percentage of the programmed line voltage. The protection is off during braking.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Undervoltage is code 20; SMC Dialog Plus is F4. On the SMC-50, code 21 is Overload; on the SMC Dialog Plus, F21 is Comm Fault.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Supply voltage lower than the programmed value
Abnormal voltage regulation
Settings or delay time not suited to the application

First checks, in this order

Check the power system and correct it if needed.
Adjust the level or extend the delay time to match the application.

Fault 22: Overload (SMC Flex)

Hits OEE: Availability

What it means: The electronic motor overload tripped. It works from the programmed overload class, overload reset mode, motor FLC and service factor.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Overload is code 21 (code 22 is Underload); SMC Dialog Plus is F7; SMC-3 is LED code 1.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power. An overload fault cannot be reset until Motor Thermal Usage (parameter 12) is below 75%.

Likely causes

Motor overloaded
Overload settings not matched to the motor

First checks, in this order

Check the motor for an overload condition.
Check the programmed overload class and motor FLC.

Fault 23: Underload (SMC Flex)

Hits OEE: Availability

What it means: The motor current dropped below the underload trip level, a percentage of the motor full load current. It is off during slow speed and braking, and needs the Motor FLC programmed.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Underload is code 22 (code 23 is Jam); SMC Dialog Plus is F9.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Broken motor shaft
Broken belts, toolbits or similar
Pump cavitation

First checks, in this order

Repair or replace the motor.
Check the machine.
Check the pump system.

Fault 24: Jam (SMC Flex)

Hits OEE: Availability

What it means: With the motor at speed, the motor current went above the jam level you programmed. Jam detection is off during slow speed and braking.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Jam is code 23 (code 24 is Stall); SMC Dialog Plus is F19.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Motor or driven machine jammed
Jam level or time set too low for the load

First checks, in this order

Find and remove the source of the jam.
Check the programmed jam time value.

Fault 25: Stall (SMC Flex)

Hits OEE: Availability

What it means: The motor was still below full speed when the programmed ramp time ran out.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Stall is code 24 (code 25 is Phase Reversal); SMC Dialog Plus is F6.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Load, machine drive parts or pump problem
Motor problem
Ramp settings not suited to the load

First checks, in this order

Check the pump system, machine drive components and loading.
Repair or replace the motor if needed.
Check the programmed settings.

Fault 26: Phase Reversal (SMC Flex)

Hits OEE: Availability

What it means: The incoming supply is in a phase sequence other than ABC. This prestart protection can be disabled.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Phase Reversal is code 25; SMC Dialog Plus is F16; SMC-3 is LED code 3.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Supply phases wired out of ABC sequence

First checks, in this order

Check the power wiring and correct the phase sequence if needed.

Fault 27: Coms Loss P2 (SMC Flex)

Hits OEE: Availability

What it means: Communication was lost on DPI port 2, for example a 20-HIM LCD module unplugged while it had control enabled.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 28 and 29 are Coms Loss P3 and Coms Loss P5. On the SMC-50, code 27 is Exp Incompat.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power. A Stop from the HIM always stops the motor and clears the fault.

Likely causes

Communication cable or HIM disconnected from the port
Logic Mask settings that make the port a control source

First checks, in this order

Check the communication cable connection to the SMC Flex.
Check the Logic Mask setting in the Communication group (control through the DPI port is off by default).

Fault 30: Network P2 (SMC Flex)

Hits OEE: Availability

What it means: A fault from the network outside the controller arrived through DPI port 2 and is shown on the LCD.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 31 and 32 are Network P3 and Network P5. On the SMC-50, codes 30 to 32 are CT Loss.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

DPI network loss

First checks, in this order

Reconnect each DPI connected device and check the network.

Fault 33: Ground Fault (SMC Flex)

Hits OEE: Availability

What it means: Ground fault current, measured by a user supplied core balance current transformer, went above the programmed level. The ground fault level and time delay must be programmed.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 Ground Fault is code 58 (x058, needs a 150-SM2 module); on the SMC-50, code 33 is HAL ID.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Ground fault in the power system or motor
Ground fault level set too low for the application

First checks, in this order

Check the power system and motor and correct any fault.
Check that the programmed ground fault levels match the application.

Fault 34: Excess Starts (SMC Flex)

Hits OEE: Availability

What it means: The number of starts in one hour went above the programmed value (parameter 81, Starts Per Hour).^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Table 44 prints it as Excess Starts/Hr. SMC-50 uses code 29 (Starts per Hour); SMC Dialog Plus uses F64.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

More starts per hour than programmed
Start time and controller thermal limits not matched to the duty

First checks, in this order

Wait before restarting.
Reduce the starts per hour, or increase the programmed start time if the application allows it and the controller thermal limits permit.
Turn off the starts per hour feature if it is not needed.

Fault 35: Power Loss A (SMC Flex)

Hits OEE: Availability

What it means: Input power phase A is not present; the LCD names the missing phase. It is a prestart fault indication. If all three phases are missing when a start is commanded, the LCD shows Starting and the motor does not turn.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 36 and 37 are Power Loss B and Power Loss C. SMC Dialog Plus uses F1 to F3 for Power Loss.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Missing supply phase, for example a blown line fuse

First checks, in this order

Check for an open line, for example a blown line fuse.

Fault 38: Hall ID (SMC Flex)

Hits OEE: Availability

What it means: The controller could not identify the power section correctly.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 uses code 33 (HAL ID).

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Loose cables between the control module and the power section
Wrong power module installed

First checks, in this order

Remove the control module from the power section and check that the connectors are firmly seated.
Check the power module and replace it if needed.

Fault 39: NVS Error (SMC Flex)

Hits OEE: Availability

What it means: The controller memory (non-volatile storage) is corrupted.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 uses code 34 (NVS Error); on the SMC-50, code 39 is TB Input 2.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Corrupted controller memory

First checks, in this order

Modify a parameter, or (preferred) load the parameter defaults, then reload your own parameters.
Replace the control module if the error stays.

Fault 40: No Load (SMC Flex)

Hits OEE: Availability

What it means: A load connection has been lost, shown without a phase.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 16 to 18 are the per phase No Load faults. On the SMC-50, code 40 is TB Input 3.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Loss of load side power wiring

First checks, in this order

Check all load side power connections.
Check the motor windings.

Fault 41: Line Loss A (SMC Flex)

Hits OEE: Availability

What it means: SCR conduction on phase A was discontinuous. The controller watches the power pole voltage and current during the expected SCR gate periods.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Codes 42 and 43 are Line Loss B and Line Loss C of the same kind (Table 43 names them F41, F42, F43). Codes 1 to 3 use the same names for a lost line connection (separate row). On the SMC-50, code 41 is TB Input 4.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Line distortion
High impedance connection

First checks, in this order

Check that the supply voltage can start and stop the motor.
Check for loose connections on the line side and motor side power wires.

Fault 44: V24 Recovery (SMC Flex)

Hits OEE: Availability

What it means: The internal 24 V control supply of the control module stays low after the bypass contactor closes.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Table 44 prints it as F44. The SMC-50 cross-reference lists V24 Recovery as code 35. On the SMC-50, code 44 is Over Power Real.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Control power outside the SMC Flex operating range
Poor control power or ground connection
Faulty control module

First checks, in this order

Check that control power is within the SMC Flex operating parameters.
Check the control power connections, including ground, to the control module.
Replace the control module.

Fault 45: V24 Loss (SMC Flex)

Hits OEE: Availability

What it means: The internal 24 V supply of the control module is out of its normal range.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Table 44 prints it as F45. SMC-50 V24 Loss is code 36.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Control power outside the operating range
Poor control power or ground connection
Faulty control module

First checks, in this order

Check that control power is within the SMC Flex operating parameters.
Check the control power connections, including ground.
Replace the control module.

Fault 46: V Control Loss (SMC Flex)

Hits OEE: Availability

What it means: The controller sensed an error in the control voltage.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Table 44 prints it as V Control F46. SMC-50 VControl Loss is code 37.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Control voltage outside the operating range
Poor control power or ground connection
Faulty control module

First checks, in this order

Check that control power is within the SMC Flex operating parameters.
Check the control power connections, including ground.
Replace the control module.

Fault 48: Input 1 (SMC Flex)

Hits OEE: Availability

What it means: Option input 1 tripped the controller because it is configured to generate a fault and its condition was met.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. Code 49 is Input 2 (Table 44: Option Input 1, 2, F48, F49). On the SMC-50, code 48 is Over Power App and code 49 is Frequency.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

The device wired to option input 1 signalled a fault
Option input fault configuration not as intended

First checks, in this order

Review the option input fault configuration.
Clear the fault condition on the input.

Fault 128-209: System Faults (SMC Flex)

Hits OEE: Availability

What it means: Internal faults of the control module, numbered F128 to F209.^[1]

Also on: Starters: SMC Flex (Bulletin 150-F). Controllers: SMC Flex. SMC-50 system faults are codes 100 to 199; SMC Dialog Plus system faults are F128 and above.

Starter response: Fault: the SMC Flex trips and stops. After fixing the cause, clear it with Clear Fault (Main Menu/Diagnostics/Faults), by holding Esc for 3 seconds (firmware 6.001 or later), with Stop on a connected HIM, with a reset button on Option Input #2 programmed for Clear Fault, or by cycling control power.

Likely causes

Control module wiring problem
Control module defective

First checks, in this order

Review the control module wiring and make sure the ground terminal is securely connected to system earth ground.
Fit an RC snubber across all inductive loads in the control circuit.
Replace the control module.

Fault 10: SCR Overtemp (SMC-50)

Hits OEE: Availability

What it means: The SMC-50 protects its SCRs from overtemperature with an internally configured I2t model; this trip means that limit was reached.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 3. Code 60 (Power Pole PTC) has the same checks. On the SMC Flex, code 10 is PTC Pwr Pole.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Controller ventilation blocked
Controller duty cycle exceeded
Cooling fan failure
Ambient temperature limit exceeded
Failed thermistor

First checks, in this order

Check that the controller has proper ventilation.
Check that the duty cycle suits the application.
Wait for the controller to cool, or add external cooling if the ambient temperature is high.
Check that the fan runs; replace it if needed.
Replace the power module or control module as needed.

Fault 11: Open Bypass A (SMC-50)

Hits OEE: Availability

What it means: The SMC-50 sensed that the bypass contactor did not close on phase A.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Codes 12 and 13 are Open Bypass B and C. 150-SM6: red LED code 7. On the SMC Flex, code 11 is SCR Overtemp and Open Bypass is 13 to 15.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Low control voltage
Inoperable power module bypass
An auxiliary contact set to external bypass

First checks, in this order

Check the control voltage supply.
Check that control module connectors TB2 to TB4 and TB5 to TB7 are in the right order and secure.
Make sure no auxiliary contact is set to external bypass.
Replace the power module if the bypass has failed.

Fault 14: No Load (SMC-50)

Hits OEE: Availability

What it means: Before the start the SMC-50 found no load connection at all (total load or all load leads lost).^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Checked before the start only. 150-SM6: yellow LED code 2. On the SMC Flex, code 14 is Open Bypass B.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Loss of load side power wiring
Start command cycled unexpectedly while the motor was still turning

First checks, in this order

Check all load side power connections.
Check the motor windings with an insulation tester, with the controller disconnected from the motor first.

Fault 15: Open Load A (SMC-50)

Hits OEE: Availability

What it means: The phase A load lead connection is off or open.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Codes 16 and 17 are Open Load B and C. Checked before the start only. 150-SM6: yellow LED code 2. On the SMC Flex, code 15 is Open Bypass C.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Loss of load side power wiring on phase A

First checks, in this order

Check the load side power connections on that phase.
Check the motor windings with an insulation tester, with the controller disconnected from the motor first.

Fault 18: Voltage Unbalance (SMC-50)

Hits OEE: Availability

What it means: The calculated supply voltage unbalance is above the fault and/or alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Table 129 prints it as Voltage Unbal. 150-SM6: yellow LED code 3. SMC Flex calls it Line Unbalance (code 19); on the SMC Flex, code 18 is No Load C.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Supply unbalance greater than the programmed value
Delay time too short for the application

First checks, in this order

Check the power system and correct it, or change the programmed value.
Extend the delay time to match the application.
Disable this fault/alarm if the application needs it.

Fault 19: Overvoltage (SMC-50)

Hits OEE: Availability

What it means: The average line voltage is above the fault and/or alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. On the SMC Flex, Overvoltage is code 20 and code 19 is Line Unbalance.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Supply voltage higher than the programmed value
Abnormal voltage regulation; with a backup generator, an unstable generator voltage regulator
Settings or delay time not suited to the application

First checks, in this order

Check the power system and correct it if needed.
Modify the setting and/or extend the delay time.
Disable this fault/alarm if the application needs it.

Fault 20: Undervoltage (SMC-50)

Hits OEE: Availability

What it means: The average line voltage is below the fault and/or alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. On the SMC Flex, Undervoltage is code 21 and code 20 is Overvoltage.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Supply voltage lower than the programmed value
Abnormal voltage regulation; with a backup generator, an unstable generator voltage regulator
Settings or delay time not suited to the application

First checks, in this order

Check the power system and correct it if needed.
Modify the setting and/or extend the delay time.
Disable this fault/alarm if the application needs it.

Fault 21: Overload (SMC-50)

Hits OEE: Availability

What it means: The motor overload protection tripped, based on the programmed overload class, overload reset, motor FLC and service factor.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: yellow LED code 4. On the SMC Flex, Overload is code 22 and code 21 is Undervoltage.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes (inherently time based). Can be disabled: yes. Auto restart allowed: yes. An overload fault cannot be reset until parameter 18 [Motor Therm Usage] is below parameter 80 [OL Reset Level]. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Motor overloaded
Overload settings not matched to the motor

First checks, in this order

Check the motor for an overload condition.
Check the programmed overload class and motor FLC, and measure the motor current.
If you disable the controller overload, fit external motor overload protection.

Fault 22: Underload (SMC-50)

Hits OEE: Availability

What it means: The motor average RMS current fell below the value you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. On the SMC Flex, Underload is code 23 and code 22 is Overload.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Broken motor shaft, belt, grating or similar
Pump cavitation
Setting wrong for the application

First checks, in this order

Check the machine drive components and loading.
Check the pump system.
Repair or replace the motor.
Check the programmed settings.

Fault 23: Jam (SMC-50)

Hits OEE: Availability

What it means: With the motor running at speed, the current rose above the jam level for the programmed time. Not active during starting or stopping.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. On the SMC Flex, Jam is code 24 and code 23 is Underload.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Motor or load jammed or overloaded
Jam level or time set too low

First checks, in this order

Correct the source of the jam or excessive loading.
Check the programmed time value.
Disable this fault/alarm if the application needs it.

Fault 24: Stall (SMC-50)

Hits OEE: Availability

What it means: The motor was not up to speed at the end of the programmed starting ramp plus the Stall Delay time.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: yellow LED code 5. On the SMC Flex, Stall is code 25 and code 24 is Jam.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Load, machine drive parts or pump problem
Wrong programmed setting

First checks, in this order

Check the pump system, machine drive components and loading; repair or replace the motor if needed.
Check the programmed settings.

Fault 25: Phase Reversal (SMC-50)

Hits OEE: Availability

What it means: The incoming supply is in a sequence other than ABC. Checked before the start only.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: yellow LED code 6. On the SMC Flex, Phase Reversal is code 26 and code 25 is Stall.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Supply phases wired out of ABC sequence

First checks, in this order

Check the power wiring and correct it if needed.
Disable this fault/alarm if the application needs it.

Fault 26: Exp Removed (SMC-50)

Hits OEE: Availability

What it means: An expansion module (for example a 150-SM4) was removed from the controller. The display adds the port number in front: 7026, 8026 or 9026. A DPI device such as a 20-HIM-A6 or 20-COMM-X only causes it when its bit in parameter 148 [Logic Mask] is set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Shown as x026 where x is the port (7, 8 or 9). When power returns the HIM may show Device Conflicts Port xy Not Found. On the SMC Flex, code 26 is Phase Reversal.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Expansion module loose or removed
Expansion module defective

First checks, in this order

Reseat or replace the expansion module connector and tighten the module screws.
Replace a defective module.

Fault 27: Exp Incompat (SMC-50)

Hits OEE: Availability

What it means: An expansion module or DPI device is in a port it cannot use, or the controller firmware does not support it. The port number is the first digit (for example 7027).^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Shown as x027. On the SMC Flex, code 27 is Coms Loss P2.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Module in an incompatible control module port
Controller firmware not compatible with the module
Defective expansion module

First checks, in this order

Move the module to a compatible port.
Update the control module firmware.
Replace a defective module.

Fault 28: Expansion (SMC-50)

Hits OEE: Availability

What it means: General fault from an expansion or peripheral device; the port number is the first digit (for example 8028).^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Shown as x028. On the SMC Flex, code 28 is Coms Loss P3.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Controller under network control switched from Run to Program mode
Expansion module loose, removed, defective or in an incompatible port
Firmware not compatible with the module

First checks, in this order

Reset the SMC-50.
Reseat or replace a loose or removed module and tighten its screws.
Replace a defective module.
Update the control module firmware.

Fault 29: Starts per Hour (SMC-50)

Hits OEE: Availability

What it means: The number of starts in a sliding one hour window reached the maximum you set, and another start was attempted.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Table 129 prints it as Excess Starts. On the SMC Flex, Excess Starts is code 34 and code 29 is Coms Loss P5.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

More starts within the last hour than programmed
Setting wrong for the application

First checks, in this order

Wait for the hour to pass, then restart the motor.
Reduce the starts per hour, or increase the programmed start time if the application and controller thermal limits allow.
Turn off this fault/alarm if it is not needed.

Fault 30: CT Loss A (SMC-50)

Hits OEE: Availability

What it means: The phase A current feedback is invalid.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Codes 31 and 32 are CT Loss B and C. 150-SM6: red LED code 4. On the SMC Flex, code 30 is Network P2.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Loose CT cable between the power section and the control module
Failed phase A current transformer feedback circuit
With a 150-SM2 option module and external CTs: CT or module problem (codes 7030 or 8030)

First checks, in this order

Remove the control module from the power section and check that TB2 (A), TB3 (B) and TB4 (C) are firmly seated.
Replace the control module and/or the power section if needed.
With external CTs: inspect the CT cables and the CTs, and replace the 150-SM2 if needed.

Fault 33: HAL ID (SMC-50)

Hits OEE: Availability

What it means: The controller found an incorrect or incompatible power pole installed.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Table 131 prints it as Hall ID. 150-SM6: red LED code 5. SMC Flex uses code 38; on the SMC Flex, code 33 is Ground Fault.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Loose cables between the controller and power section
Incompatible power section installed

First checks, in this order

Remove the control module and check that TB2, TB3 and TB4 are firmly seated.
Check the power section and replace it if needed.

Fault 34: NVS Error (SMC-50)

Hits OEE: Availability

What it means: Error in the SMC-50 non-volatile memory. Cycling power does not clear it; change a parameter or load the defaults.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 5. SMC Flex uses code 39; on the SMC Flex, code 34 is Excess Starts.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Not cleared by cycling power. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Controller memory corrupted
Option module error (codes 7034, 8034 or 9034)

First checks, in this order

Modify a parameter, or (preferred) load the parameter defaults and reload your own parameters.
For an option module error, check the option module sensor cables and replace the module if needed.

Fault 36: V24 Loss (SMC-50)

Hits OEE: Availability

What it means: The internal 24 V DC supply that powers the controller logic and the on-board 24 V I/O is outside its allowed range.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 5. On the SMC Flex, V24 Loss is code 45 and code 36 is Power Loss B.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

A loose wire on control terminal 1 (+L1) or 2 (-L2)
Too much load on the internal 24 V supply
Low line voltage

First checks, in this order

Check that control power is within specification.
Check the line connections and grounding at the control terminals.
Replace the control module.

Fault 37: VControl Loss (SMC-50)

Hits OEE: Availability

What it means: The user supplied control voltage is above or below its allowed limits.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Table 131 prints it as V Control Loss. 150-SM6: red LED code 5. On the SMC Flex, V Control Loss is code 46 and code 37 is Power Loss C.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

A loose wire on control terminal 1 (+L1) or 2 (-L2)
Low line voltage

First checks, in this order

Check that control power is within specification.
Check the connections and grounding at the control terminals.
Replace the control module.

Fault 38: TB Input 1 (SMC-50)

Hits OEE: Availability

What it means: Control terminal input 1 is configured to generate a fault and its N.O. or N.C. condition was met.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Codes 39, 40 and 41 are TB Input 2, 3 and 4. 150-SM6: red LED code 6. On the SMC Flex, code 38 is Hall ID.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

The device wired to the input signalled a fault
Input wiring or N.O./N.C. fault configuration wrong

First checks, in this order

Clear the fault condition.
Rewire or reconfigure the input.

Fault 42: Current Imbal (SMC-50)

Hits OEE: Availability

What it means: The calculated current imbalance is equal to or above the fault/alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: yellow LED code 7. On the SMC-3, Phase Imbalance is LED code 5.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Supply unbalance greater than the programmed value
Delay time too short for the application

First checks, in this order

Check the power system and correct it, or change the programmed value.
Extend the delay time.
Disable this fault/alarm if the application needs it.

Fault 43: Under Power Real (SMC-50)

Hits OEE: Availability

What it means: The real power (kW) drawn by the motor fell below the fault/alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Table 131 prints it as Und Pwr Real. Code 44 is the matching Over Power Real.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Broken mechanical link between motor and load (belt, gears and similar)
Pump cavitation
Setting wrong for the application

First checks, in this order

Find and repair what reduced the real power load.
Adjust the fault/alarm settings to the application; Rockwell suggests first measuring a normal running value.
Disable the fault/alarm if it is not needed.

Fault 44: Over Power Real (SMC-50)

Hits OEE: Availability

What it means: The real power (kW) drawn by the motor rose above the fault/alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Table 131 prints it as Ovr Pwr Real. On the SMC Flex, code 44 is V24 Recovery.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Abnormally high power draw by the motor
Setting wrong for the application

First checks, in this order

Find and repair what caused the high power draw.
Adjust the fault/alarm settings to the application.
Disable the fault/alarm if it is not needed.

Fault 49: Frequency (SMC-50)

Hits OEE: Availability

What it means: The line frequency went above or below the high or low frequency fault/alarm level you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. On the SMC Flex, code 49 is Input 2.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Generator speed control unable to follow the load, or defective
Supply running outside its normal frequency range

First checks, in this order

Reduce the generator load, increase generator output, or repair the speed control (Rockwell recommends oversizing a diesel generator by three times for soft start use).
Ask the power company about the supply.
Adjust the fault/alarm settings to the application.

Fault 50: PM Hours (SMC-50)

Hits OEE: Availability

What it means: Preventive maintenance reminder: the motor reached the number of running hours you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Programmed PM Hours value reached

First checks, in this order

Do the required maintenance, then reset the PM Hours parameter.
Disable this fault/alarm if it is not used.

Fault 51: PM Starts (SMC-50)

Hits OEE: Availability

What it means: Preventive maintenance reminder: the motor reached the number of starts you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Checked before the start.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Programmed PM Starts value reached

First checks, in this order

Do the required maintenance, then reset the counter.
Disable this fault/alarm if it is not used.

Fault 52: Power Quality A (SMC-50)

Hits OEE: Availability

What it means: The starter is not firing the phase A SCR properly during start or stop.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Codes 53 and 54 are Power Quality B and C.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Unstable or distorted incoming 3-phase voltage
High impedance line or load connection

First checks, in this order

Check that the supply can start and stop the motor.
Check for loose connections on the line and motor side power wires.
Correct the power quality problem.
Disable this fault/alarm if the application needs it.

Fault 55: Power Quality THD V (SMC-50)

Hits OEE: Availability

What it means: Voltage based total harmonic distortion is above the THD V level and/or time you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Code 56 is the current based Power Quality THD I.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Mix of loads on the power line adds too much voltage distortion

First checks, in this order

Check what loads were added or changed and adjust the load mix.
Change the THD V level and/or delay time.
Disable this fault/alarm if not needed.

Fault 56: Power Quality THD I (SMC-50)

Hits OEE: Availability

What it means: Current based total harmonic distortion is above the THD I level and/or time you set.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Mix of loads on the power line adds too much current distortion

First checks, in this order

Check what loads were added or changed and adjust the load mix.
Change the THD I level and/or delay time.
Disable this fault/alarm if not needed.

Fault 57: Config Change (SMC-50)

Hits OEE: Availability

What it means: A controller parameter was changed.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Parameter configuration modified

First checks, in this order

Confirm the change was intended.
Disable this fault/alarm if you do not want it.

Fault 58: Ground Fault (SMC-50)

Hits OEE: Availability

What it means: Ground fault current went above the level you set. Needs a 150-SM2 Ground Fault PTC module and an 825-CBCT core balance sensor; shown with the port number first (x058).^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. SMC Flex Ground Fault is code 33.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Ground fault in the power system or motor
Ground fault level or delay set wrong for the application

First checks, in this order

Check the power system and motor and correct any fault.
Check the programmed ground fault levels and extend the delay time if needed.
Disable this fault/alarm if the application needs it.

Fault 59: Motor PTC (SMC-50)

Hits OEE: Availability

What it means: The PTC embedded in the motor tripped because the motor is too hot. Needs a 150-SM2 module; shown as x059.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. SMC Flex Motor PTC is code 12.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: no. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Motor ventilation blocked
Motor duty cycle exceeded
PTC open or shorted

First checks, in this order

Check the motor ventilation and the duty cycle.
Wait for the motor to cool or add external cooling, then check the PTC resistance.
Disable this fault/alarm if the application needs it.

Fault 60: Power Pole PTC (SMC-50)

Hits OEE: Availability

What it means: The built-in power pole temperature sensor measured a temperature above the set limit.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 3. SMC Flex calls it PTC Pwr Pole (code 10).

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Controller ventilation blocked
Controller duty cycle exceeded
Cooling fan failure
Ambient temperature limit exceeded
Failed thermistor

First checks, in this order

Check that the controller has proper ventilation.
Check that the duty cycle suits the application.
Wait for the controller to cool, or add external cooling if the ambient temperature is high.
Check that the fan runs; replace it if needed.
Replace the power module or control module as needed.

Fault 61: I/O Config (SMC-50)

Hits OEE: Availability

What it means: The control input setup breaks the configuration rules, for example an input set as start or slow speed with no input set as coast or stop. It appears when the start is attempted, and the motor does not start.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. Checked before the start.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Input programmed as start or slow speed without a coast or stop input
An input changed from one that can stop the motor to one that cannot

First checks, in this order

Change the control I/O configuration so it meets the rules in Configuration Functions (manual page 131).

Fault 62: Test Fault (SMC-50)

Hits OEE: Availability

What it means: The HOLD TO TEST, PUSH TO RESET button was held for more than 3 seconds but less than 10 seconds, which creates a test fault.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 6. The SMC-3 test is LED code 7.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Button held for a test
Button stuck or damaged

First checks, in this order

Reset by pressing the button for less than 2 seconds.
If the button is stuck, free it or replace the control module.

Fault 69: RTC Battery Low (SMC-50)

Warning: act before it becomes a stop

What it means: The battery that keeps the real time clock and calendar running is low.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 5.

Starter response: Alarm only, always enabled; the motor can keep running. Replace the battery to clear it.

Likely causes

CR2032 battery low

First checks, in this order

Replace the CR2032 battery as soon as possible.

Fault 70: Locked Rotor (SMC-50)

Hits OEE: Availability

What it means: In a running mode the motor current rose above the locked rotor level you set, meaning the rotor is not turning. Not active during starting or stopping.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50.

Starter response: Fault and/or alarm (you choose fault, alarm or both). Time delay available: yes. Can be disabled: yes. Auto restart allowed: yes. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Motor stalled, load binding or jammed
Parameters not set for the application

First checks, in this order

Check the motor and load for binding or a jam.
Review and adjust the parameters.
Disable the fault/alarm if not needed.

Fault 100-199: System Faults (SMC-50)

Hits OEE: Availability

What it means: General hardware faults of the SMC-50, for example a system watchdog failure.^[2]

Also on: Starters: SMC-50 (Bulletin 150). Controllers: SMC-50. 150-SM6: red LED code 5. SMC Flex system faults are 128 to 209.

Starter response: Fault only. Time delay available: no. Can be disabled: no, always enabled. Auto restart allowed: no. Clear a fault after fixing the cause with the HOLD TO TEST, PUSH TO RESET button (press under 2 seconds), an option input programmed for Clear Fault, Restart Enable (parameter 135 or 264) or a control power cycle.

Likely causes

Control module wiring problem
Control module defective

First checks, in this order

Review the control module wiring and make sure the ground terminal is secure and connected to earth ground.
Fit an RC snubber/suppressor across all inductive loads in the control circuit.
Replace the control module.

Fault F1 / F30: Power Loss, A (SMC Dialog Plus)

Hits OEE: Availability

What it means: Input power phase A is not present; the LCD names the missing phase. It is a prestart fault. If all three phases are missing at a start command, the LCD shows Starting without motor rotation.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. F30 is the same fault; F2/F31 is Power Loss B and F3/F32 is Power Loss C.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Missing supply phase
Converter module and/or its cable failed

First checks, in this order

Check for an open line, for example a blown line fuse.
Inspect the converter module cable connections.

Fault F4: Undervoltage (SMC Dialog Plus)

Hits OEE: Availability

What it means: The supply voltage fell below the user programmed undervoltage level (a percentage of the programmed line voltage). Off during braking.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Table 10.A prints it as Undervolt.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Supply voltage below the programmed value
Delay time too short for the application

First checks, in this order

Check the power system and correct it if needed.
Correct the programmed value.
Extend the delay time to match the application.

Fault F5: Overvoltage (SMC Dialog Plus)

Hits OEE: Availability

What it means: The supply voltage rose above the user programmed overvoltage level. Off during braking.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Table 10.A prints it as Overvolt.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Supply voltage above the programmed value

First checks, in this order

Check the power system and correct it if needed.
Correct the programmed value.

Fault F6: Stall (SMC Dialog Plus)

Hits OEE: Availability

What it means: At the end of the programmed ramp time the motor was not up to speed, so the controller shut down after the selected delay.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Motor or load stalled

First checks, in this order

Correct the source of the stall.

Fault F7: Overload (SMC Dialog Plus)

Hits OEE: Availability

What it means: The motor overload protection tripped (overload class, overload reset, motor FLC and service factor are set in the Calibration group).^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Rockwell's example fault screen shows OVERLOAD with F 7.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power. An overload fault cannot be reset until Motor Thermal Usage (parameter 11) is below 75%.

Likely causes

Motor overloaded
Overload settings not matched to the motor

First checks, in this order

Check the motor for an overload condition.
Check the programmed overload class and motor FLC.

Fault F8: Controller Temp. (SMC Dialog Plus)

Hits OEE: Availability

What it means: A power pole reached its maximum rated temperature, measured by thermistors on the SCRs, so the SCRs were turned off. It can be reset right away, but the motor cannot restart until the controller has cooled below the trip level.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Table 10.A prints it as Controller Temperature.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Controller ventilation blocked
Controller duty cycle exceeded
Fan failure (if fitted)
Ambient temperature limit exceeded
Failed thermistor
Failed control module

First checks, in this order

Check for proper ventilation.
Check the application duty cycle.
Replace the fan if it has failed.
Wait for the controller to cool or provide external cooling.
Replace the power module or control module if needed.

Fault F9: Underload (SMC Dialog Plus)

Hits OEE: Availability

What it means: The motor current dropped below the programmed underload trip level, a percentage of motor full load current. Off during slow speed and braking.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Broken motor shaft
Broken belts, toolbits or similar
Pump cavitation

First checks, in this order

Repair or replace the motor.
Check the machine.
Check the pump system.

Fault F10: Volt Unbalance (SMC Dialog Plus)

Hits OEE: Availability

What it means: The calculated supply voltage unbalance reached the user programmed trip percentage. Off during braking.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Table 10.A prints it as Voltage Unbalance.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Supply unbalance greater than the programmed value
Delay time too short for the application

First checks, in this order

Check the power system and correct it if needed.
Extend the delay time to match the application.

Fault F11 / F26: Line Fault, A (SMC Dialog Plus)

Hits OEE: Availability

What it means: Prestart line fault on phase A: phase loss, load loss or a shorted SCR.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. F26 is the same fault; F12/F27 is Line Fault B and F13/F28 is Line Fault C. F15 and F29 are Line Fault without phase (separate row).

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Missing supply phase
Motor not connected properly
Shorted SCR
Converter module and/or cable failure

First checks, in this order

Check for an open line, for example a blown fuse.
Check for an open load lead.
Check for a shorted SCR and replace it if needed.
Inspect the converter module cable connections, then consult the factory if it stays.

Fault F15 / F29: Line Fault (SMC Dialog Plus)

Hits OEE: Availability

What it means: Line fault with no phase shown, found while running: phase loss, load loss or a shorted SCR.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. F29 is the same fault.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Missing supply phase
Motor not connected properly
Shorted SCR

First checks, in this order

Check for an open line, for example a blown fuse.
Check for an open load lead.
Check for a shorted SCR and replace it if needed.
To narrow it down, clear the fault and start again: if the condition is still there, the controller shows Power Loss or Line Fault with the phase.

Fault F16: Phase Reversal (SMC Dialog Plus)

Hits OEE: Availability

What it means: The incoming supply is in a sequence other than ABC. This prestart protection can be disabled.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Supply phases wired out of ABC sequence

First checks, in this order

Check the power wiring.

Fault F19: Jam (SMC Dialog Plus)

Hits OEE: Availability

What it means: With the controller at speed, the motor current reached the user defined jam level (a percentage of motor full load current). Off during slow speed and braking.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Motor or load jammed

First checks, in this order

Correct the source of the jam.

Fault F20: Curr Fdbk Loss (SMC Dialog Plus)

Hits OEE: Availability

What it means: The controller lost its current feedback signal.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Listed in the troubleshooting table (10.A) but not in the fault code cross-reference (9.A).

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Converter module cable disconnected

First checks, in this order

Inspect the converter module cable and its connections.

Fault F21: Comm Fault (SMC Dialog Plus)

Hits OEE: Availability

What it means: A Bulletin 1201 HIM or 1203 communication module was disconnected while it had control enabled (Logic Mask, parameter 85, set to 4).^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power. With firmware older than 1.04C a Comm Fault cannot be cleared from the HIM Stop button.

Likely causes

Communication cable disconnected at the serial port

First checks, in this order

Check for a disconnected communication cable at the SMC Dialog Plus.

Fault F23: Open Gate, A (SMC Dialog Plus)

Hits OEE: Availability

What it means: Faulty SCR firing, for example an open SCR gate, was sensed on phase A during the start. The controller tries to start three times before it shuts down.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. F24 is Open Gate B and F25 is Open Gate C.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Open gate circuit
Loose gate lead (180 to 1000 A units)

First checks, in this order

Do a resistance check and replace the power module if needed.
Check the gate lead connections to the interface board.

Fault F64: Excess Starts/Hr. (SMC Dialog Plus)

Hits OEE: Availability

What it means: The number of starts in one hour went above the programmed value.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

More starts per hour than programmed

First checks, in this order

Wait an appropriate time before restarting.
Turn off the starts per hour feature if it is not needed.

Fault F128-138: System Faults (SMC Dialog Plus)

Hits OEE: Availability

What it means: Internal hardware failure of the control module.^[3]

Also on: Starters: SMC Dialog Plus (Bulletin 150). Controllers: SMC Dialog Plus. Table 10.A says F128 and above. MPU Comm Fault (no code) also means an internal control module hardware failure.

Starter response: Fault: the LCD shows the fault text on line 1 and the F code on line 2. After fixing the cause, clear it with Clear Fault (Faults or Linear List group), with Stop on a connected HIM (not when Logic Mask, parameter 85, is 0) or by cycling control power.

Likely causes

Internal control module hardware failure

First checks, in this order

Replace the control module.

Fault 1 flash: Overload (SMC-3)

Hits OEE: Availability

What it means: The built-in electronic motor overload tripped. It measures current with a CT on each phase; the trip current is 120% of the motor FLA dial setting, and the trip class is OFF, 10, 15 or 20 (DIP switches 11 and 12).^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 1 OVLD. SMC Flex Overload is code 22, SMC-50 code 21, SMC Dialog Plus F7.

Starter response: Fault: the RUN/FAULT LED flashes once (the label prints 1 OVLD) and fault contact 97/98 changes state. Reset depends on DIP switch 13: Manual, press the Reset/Test button; Auto, it resets by itself when the motor thermal model drops below 75% of thermal capacity.

Likely causes

Motor current above 120% of the dial setting for longer than the trip class allows
FLA dial set below the motor full load current
Trip class set too fast for the starting duty

First checks, in this order

Set the FLA dial to the motor full load current (trip rating is 120% of the dial setting).
Check the overload trip class on DIP switches 11 and 12.
Check the motor and load for an overload, as Rockwell advises for the same fault on the SMC Flex.

Fault 2 flashes: Overtemperature (SMC-3)

Hits OEE: Availability

What it means: The SCR power poles reached their maximum rated temperature, measured by internal thermistors. The controller switches off, shows TEMP on the LED and closes fault contact 97/98.^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 2 TEMP. SMC Flex uses codes 10 and 11, SMC-50 codes 10 and 60, SMC Dialog Plus F8.

Starter response: Fault: the RUN/FAULT LED flashes the code and fault contact 97/98 changes state. Reset by cycling control power after fixing the cause.

Likely causes

Power poles at their maximum rated temperature

First checks, in this order

Let the controller cool before restarting.
Check ventilation, duty cycle and ambient temperature, as Rockwell lists for SCR overtemperature on the SMC Flex and SMC-50.

Fault 3 flashes: Phase Reversal (SMC-3)

Hits OEE: Availability

What it means: With phase reversal protection on (DIP switch 16, Phase Rotation), the SMC-3 checks the 3-phase input sequence before every start and aborts the start if it is wrong.^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 3 PHASE REVERSAL.

Starter response: Fault: the RUN/FAULT LED flashes the code and fault contact 97/98 changes state. Reset by cycling control power after fixing the cause.

Likely causes

Supply phases connected in the wrong sequence

First checks, in this order

Check the line phase sequence and correct the power wiring.
Check DIP switch 16 (Phase Rotation Enabled or Disabled).

Fault 4 flashes: Phase Loss/Open Load (SMC-3)

Hits OEE: Availability

What it means: The SMC-3 will not start with a single-phase condition on the line, and before every start it checks the load connections to the motor; a missing phase or open load aborts the start.^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 4 PHASE LOSS/OPEN LOAD.

Starter response: Fault: the RUN/FAULT LED flashes the code and fault contact 97/98 changes state. Reset by cycling control power after fixing the cause.

Likely causes

A supply phase missing, for example a blown fuse
Open motor lead or load connection

First checks, in this order

Check all three supply phases, fuses and disconnects.
Check the motor leads and terminal connections (2/T1, 4/T2, 6/T3).

Fault 5 flashes: Phase Imbalance (SMC-3)

Hits OEE: Availability

What it means: The phase currents were more than 50% out of balance for 3 seconds, so the SMC-3 tripped to protect the motor.^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 5 PHASE IMBALANCE. SMC-50 Current Imbal is code 42.

Starter response: Fault: the RUN/FAULT LED flashes the code and fault contact 97/98 changes state. Reset by cycling control power after fixing the cause.

Likely causes

Phase current imbalance above 50% for 3 seconds

First checks, in this order

Check the supply voltage on each phase and the motor and line connections.
Check the motor windings.

Fault 6 flashes: Shorted SCR (SMC-3)

Hits OEE: Availability

What it means: Before every start and during starting the SMC-3 checks all SCRs for shorts and the load connections to the motor. A shorted SCR aborts the start.^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 6 SHORTED SCR. SMC Flex and SMC-50 use codes 4 to 6.

Starter response: Fault: the RUN/FAULT LED flashes the code and fault contact 97/98 changes state. Reset by cycling control power after fixing the cause.

Likely causes

Shorted SCR in the SMC-3
Open load seen during the SCR check

First checks, in this order

Check the SCRs for a short (Rockwell's fix for a shorted SCR on the SMC Flex is a resistance check and power module replacement).
Check the motor connections for an open load.

Fault 7 flashes: Test (SMC-3)

Hits OEE: Availability

What it means: Push to Test: holding the Reset/Test button for 5 seconds trips the SMC-3 on purpose, changes fault contact 97/98 and shuts the controller down so the control wiring can be tested.^[4]^[5]

Also on: Starters: SMC-3 (Bulletin 150). Controllers: SMC-3. Installation label text: 7 TEST. SMC-50 Test Fault is code 62.

Starter response: Test state: the LED shows the test code and fault contact 97/98 changes state. Clear it with the Reset button or by cycling control power.

Likely causes

Reset/Test button held for 5 seconds

First checks, in this order

Press the Reset/Test button again, or cycle control power, to return to operation.

Allen-Bradley SMC Fault Codes

How faults show

Quick lookup

Each code: causes and first checks

Fault 1: Line Loss A

Fault 4: Shorted SCR A

Fault 7: Open Gate A

Fault 10: PTC Pwr Pole (SMC Flex)

Fault 11: SCR Overtemp (SMC Flex)

Fault 12: Motor PTC (SMC Flex)

Fault 13: Open Bypass A (SMC Flex)

Fault 16: No Load A (SMC Flex)

Fault 19: Line Unbalance (SMC Flex)

Fault 20: Overvoltage (SMC Flex)

Fault 21: Undervoltage (SMC Flex)

Fault 22: Overload (SMC Flex)

Fault 23: Underload (SMC Flex)

Fault 24: Jam (SMC Flex)

Fault 25: Stall (SMC Flex)

Fault 26: Phase Reversal (SMC Flex)

Fault 27: Coms Loss P2 (SMC Flex)

Fault 30: Network P2 (SMC Flex)

Fault 33: Ground Fault (SMC Flex)

Fault 34: Excess Starts (SMC Flex)

Fault 35: Power Loss A (SMC Flex)

Fault 38: Hall ID (SMC Flex)

Fault 39: NVS Error (SMC Flex)

Fault 40: No Load (SMC Flex)

Fault 41: Line Loss A (SMC Flex)

Fault 44: V24 Recovery (SMC Flex)

Fault 45: V24 Loss (SMC Flex)

Fault 46: V Control Loss (SMC Flex)

Fault 48: Input 1 (SMC Flex)

Fault 128-209: System Faults (SMC Flex)

Fault 10: SCR Overtemp (SMC-50)

Fault 11: Open Bypass A (SMC-50)

Fault 14: No Load (SMC-50)

Fault 15: Open Load A (SMC-50)

Fault 18: Voltage Unbalance (SMC-50)

Fault 19: Overvoltage (SMC-50)

Fault 20: Undervoltage (SMC-50)

Fault 21: Overload (SMC-50)

Fault 22: Underload (SMC-50)

Fault 23: Jam (SMC-50)

Fault 24: Stall (SMC-50)

Fault 25: Phase Reversal (SMC-50)

Fault 26: Exp Removed (SMC-50)

Fault 27: Exp Incompat (SMC-50)

Fault 28: Expansion (SMC-50)

Fault 29: Starts per Hour (SMC-50)

Fault 30: CT Loss A (SMC-50)

Fault 33: HAL ID (SMC-50)

Fault 34: NVS Error (SMC-50)

Fault 36: V24 Loss (SMC-50)

Fault 37: VControl Loss (SMC-50)

Fault 38: TB Input 1 (SMC-50)

Fault 42: Current Imbal (SMC-50)

Fault 43: Under Power Real (SMC-50)

Fault 44: Over Power Real (SMC-50)

Fault 49: Frequency (SMC-50)

Fault 50: PM Hours (SMC-50)

Fault 51: PM Starts (SMC-50)

Fault 52: Power Quality A (SMC-50)

Fault 55: Power Quality THD V (SMC-50)

Fault 56: Power Quality THD I (SMC-50)

Fault 57: Config Change (SMC-50)

Fault 58: Ground Fault (SMC-50)

Fault 59: Motor PTC (SMC-50)

Fault 60: Power Pole PTC (SMC-50)

Fault 61: I/O Config (SMC-50)

Fault 62: Test Fault (SMC-50)

Fault 69: RTC Battery Low (SMC-50)

Fault 70: Locked Rotor (SMC-50)

Fault 100-199: System Faults (SMC-50)

Fault F1 / F30: Power Loss, A (SMC Dialog Plus)

Fault F4: Undervoltage (SMC Dialog Plus)

Fault F5: Overvoltage (SMC Dialog Plus)

Fault F6: Stall (SMC Dialog Plus)

Fault F7: Overload (SMC Dialog Plus)

Fault F8: Controller Temp. (SMC Dialog Plus)