ABB ACS550 Fault Codes

0001: OVERCURRENT

What it means: The output current to the motor is too high, so the drive tripped to protect itself.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0001 and name OVERCURRENT)

Likely causes

• Too much load on the motor
• Acceleration time too short (2202 ACCELER TIME 1, 2205 ACCELER TIME 2)
• Faulty motor, motor cable or connections

First checks, in this order

1. Read 0407 CURRENT AT FLT and 0404 SPEED AT FLT to see whether the trip came at start, while speeding up or at steady speed
2. Check the driven machine for overload or binding
3. Lengthen 2202 ACCELER TIME 1 (and 2205 ACCELER TIME 2 if it is used)
4. With power off for 5 minutes, check the motor, the motor cable and the terminal connections

0002: DC OVERVOLT

What it means: The intermediate circuit (DC bus) voltage inside the drive is too high, so the drive tripped.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0002 and name DC OVERVOLT)

Likely causes

• Static or short transient overvoltage on the incoming supply
• Deceleration time too short, so the braking load pushes the DC voltage up (2203 DECELER TIME 1, 2206 DECELER TIME 2)
• Brake chopper too small, if one is fitted

First checks, in this order

1. Read 0406 VOLTAGE AT FLT and note whether the trip came while the motor was slowing down
2. Check 2005 OVERVOLT CTRL is 1 (ENABLE); if a brake chopper or brake resistor is connected it must be 0 (DISABLE)
3. Lengthen 2203 DECELER TIME 1 (and 2206 DECELER TIME 2 if it is used)
4. Measure the supply for overvoltage or spikes, and check the brake chopper and resistor size if fitted

0003: DEV OVERTEMP

What it means: The drive heatsink has reached its trip temperature: 115 °C (239 °F) on frames R1 to R4 and 125 °C (257 °F) on R5 and R6.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0003 and name DEV OVERTEMP; their manuals describe it as IGBT temperature, so the trip temperature differs)

Likely causes

• Cooling fan failed
• Air flow blocked, or dirt and dust on the heatsink
• Ambient temperature too high
• Motor load too heavy

First checks, in this order

1. Check that the cooling fan runs and that the air inlet and outlet are clear
2. Read 0110 DRIVE TEMP and compare it with the trip limit for the frame size
3. With power off for 5 minutes, clean the heatsink with dry compressed air (the manual suggests every 6 to 12 months depending on dust)
4. Check the cabinet or room temperature and the motor load

0004: SHORT CIRC

What it means: The drive detected fault current, usually from a short circuit on the motor side.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0004 and name SHORT CIRC)

Likely causes

• Short circuit in the motor cable or the motor
• Disturbances on the supply

First checks, in this order

1. Switch off, wait 5 minutes, then disconnect the motor cable at the drive
2. Check the motor cable and motor windings for a short circuit, phase to phase and phase to ground
3. Look for damaged insulation or loose strands in the motor terminal box
4. If the cable and motor test good, look for supply disturbances before restarting

0006: DC UNDERVOLT

What it means: The intermediate circuit (DC bus) voltage is too low for the drive to keep running.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0006 and name DC UNDERVOLT)

Likely causes

• A phase missing on the input supply
• Blown input fuse
• Mains voltage too low

First checks, in this order

1. Measure the voltage on all three input phases at U1, V1 and W1
2. Check the input fuses, breaker and contactor
3. Read 0406 VOLTAGE AT FLT to see how low the DC voltage was
4. If short supply dips are normal on site, 2006 UNDERVOLT CTRL can help a high inertia load ride through them

0007: AI1 LOSS

What it means: Analog input 1 dropped below the fault limit in 3021 AI1 FAULT LIMIT while it was being used as a reference or PID signal.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0007 and name AI1 LOSS)

Likely causes

• Broken wire or loose terminal on the AI1 signal
• The signal source (sensor, PLC output or potentiometer) failed or is switched off
• 3021 AI1 FAULT LIMIT or 3001 AI<MIN FUNCTION does not suit the signal range

First checks, in this order

1. Measure the signal at the AI1 terminals and read 0120 AI 1
2. Check the signal source and its cable
3. Check 3021 AI1 FAULT LIMIT against the real minimum of the signal
4. Check 3001 AI<MIN FUNCTION: 1 = fault, 2 = alarm and run at 1208 CONST SPEED 7, 3 = alarm and keep the last speed

0008: AI2 LOSS

What it means: Analog input 2 dropped below the fault limit in 3022 AI2 FAULT LIMIT while it was being used as a reference or PID signal.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0008 and name AI2 LOSS)

Likely causes

• Broken wire or loose terminal on the AI2 signal
• The signal source failed or is switched off
• 3022 AI2 FAULT LIMIT or 3001 AI<MIN FUNCTION does not suit the signal range

First checks, in this order

1. Measure the signal at the AI2 terminals and read 0121 AI 2
2. Check the signal source and its cable
3. Check 3022 AI2 FAULT LIMIT against the real minimum of the signal
4. Check 3001 AI<MIN FUNCTION (fault, constant speed 7 or last speed)

0009: MOT OVERTEMP

What it means: The motor is too hot, judged either from the drive's motor thermal model or from a temperature sensor.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0009 and name MOT OVERTEMP)

Likely causes

• Motor overloaded
• Thermal model settings 3005 to 3009 do not match the motor
• Temperature sensor or its wiring faulty, or Group 35 MOTOR TEMP MEAS set wrongly

First checks, in this order

1. Compare the motor current with the nameplate and check the motor for overload
2. Check 3005 MOT THERM PROT, 3006 MOT THERM TIME, 3007 MOT LOAD CURVE, 3008 ZERO SPEED LOAD and 3009 BREAK POINT FREQ
3. If a sensor is used, check it, its wiring and the Group 35 parameters, and read 0145 MOTOR TEMP
4. With 3005 = 1 (FAULT) the model gives alarm 2010 at 90 °C and this fault at 110 °C calculated motor temperature

0010: PANEL LOSS

What it means: Communication with the control panel was lost while the drive was in local control, or in remote control with start, stop, direction or reference taken from the panel.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0010 and name PANEL LOSS)

Likely causes

• Panel loose or unplugged, or its cable or connector damaged
• The panel is still set as a control source in remote mode (Group 10, Group 11)

First checks, in this order

1. Reseat the panel and check its cable and connector
2. Check 3002 PANEL COMM ERR: 1 = fault, 2 = alarm and run at constant speed 7, 3 = alarm and keep the last speed
3. In REM, check Group 10 START/STOP/DIR and Group 11 REFERENCE SELECT do not take commands from the panel

0011: ID RUN FAIL

What it means: The motor identification (ID) run did not finish successfully.^[1][2][5]

Also on: ACS355 (same code 0011 and name ID RUN FAIL)

Likely causes

• Problem in the motor connections
• Motor data 9905 to 9909 entered wrongly

First checks, in this order

1. Check the motor cable connections at the drive and at the motor
2. Compare 9905 MOTOR NOM VOLT, 9906 MOTOR NOM CURR, 9907 MOTOR NOM FREQ, 9908 MOTOR NOM SPEED and 9909 MOTOR NOM POWER with the nameplate
3. Run the ID run again with 9910 ID RUN

0012: MOTOR STALL

What it means: The motor or the process has stalled: the drive ran in the stall region for longer than the stall time.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0012 and name MOTOR STALL)

Likely causes

• Load too heavy
• Motor too small for the job
• Stall settings 3010 to 3012 not suited to the application

First checks, in this order

1. Check the driven machine for jams, binding or overload
2. Check that the motor power is enough for the load
3. Check 3010 STALL FUNCTION, 3011 STALL FREQUENCY and 3012 STALL TIME
4. Check the torque limit that defines the stall region, 2017 MAX TORQUE 1 or 2018 MAX TORQUE 2

0014: EXT FAULT 1

What it means: The digital input chosen in 3003 EXTERNAL FAULT 1 is signalling an external fault, so the drive coasted to a stop.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0014 and name EXT FAULT 1)

Likely causes

• The external device wired to that input has signalled a fault
• Broken wire on an input set as inverted, DI(INV), which reports a fault when the signal drops
• Wrong digital input selected in 3003

First checks, in this order

1. Read 3003 EXTERNAL FAULT 1 to see which digital input is used and whether it is inverted
2. Find and clear the fault on the external device wired to that input
3. Check the input state at the time of the trip in 0410 DI 1-3 AT FLT or 0411 DI 4-6 AT FLT, then check the wiring

0015: EXT FAULT 2

What it means: The digital input chosen in 3004 EXTERNAL FAULT 2 is signalling a second external fault.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0015 and name EXT FAULT 2)

Likely causes

• The external device wired to that input has signalled a fault
• Broken wire on an inverted input
• Wrong digital input selected in 3004

First checks, in this order

1. Read 3004 EXTERNAL FAULT 2 to see which digital input is used
2. Find and clear the fault on the external device wired to that input
3. Check the input state in 0410 or 0411 and the wiring

0016: EARTH FAULT

What it means: The drive detected a possible ground (earth) fault in the motor or motor cables, either while running or while stopped.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0016 and name EARTH FAULT)

Likely causes

• Insulation fault to ground in the motor or motor cable
• Fault in the input wiring
• Motor cable longer than the maximum allowed
• False trips while stopped on a delta grounded supply with high capacitance motor cables

First checks, in this order

1. Switch off, wait 5 minutes and check the motor and motor cable insulation to ground
2. Check the input wiring
3. Check the motor cable length against the limit in the manual
4. Only for confirmed false trips: 3023 WIRING FAULT turns off the check while stopped, 3017 EARTH FAULT turns off all ground fault checks (may void the warranty), and Rev H adds 3028 EARTH FAULT LVL to lower the sensitivity

0018: THERM FAIL

What it means: Internal fault: the thermistor that measures the drive's internal temperature is open or shorted.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0018 and name THERM FAIL)

Likely causes

• Internal temperature thermistor open circuit
• Internal temperature thermistor short circuit

First checks, in this order

1. Write down the code and the fault history in 0401, 0412 and 0413
2. Switch off for 5 minutes and power up again to see if the fault returns
3. If it returns, contact ABB service; the manual gives no user repair

0019: OPEX LINK

What it means: Internal fault: a communication problem was found on the fibre optic link between the control board and the OINT board.^[1][2]

Likely causes

• Fault on the internal fibre optic link between the control and OINT boards

First checks, in this order

1. Write down the code and the fault history in 0401, 0412 and 0413
2. Switch off for 5 minutes and power up again to see if the fault returns
3. Contact ABB service; the manual gives no user repair

0020: OPEX PWR

What it means: Internal fault: an exceptionally low voltage was detected on the OINT board power supply.^[1][2]

Likely causes

• Low voltage on the internal OINT board power supply

First checks, in this order

1. Write down the code and the fault history in 0401, 0412 and 0413
2. Switch off for 5 minutes and power up again to see if the fault returns
3. Contact ABB service; the manual gives no user repair

0021: CURR MEAS

What it means: Internal fault: the drive's current measurement is out of range.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0021 and name CURR MEAS)

Likely causes

• Internal current measurement fault

First checks, in this order

1. Write down the code and the fault history in 0401, 0412 and 0413
2. Switch off for 5 minutes and power up again to see if the fault returns
3. Contact ABB service; the manual gives no user repair

0022: SUPPLY PHASE

What it means: The ripple voltage on the DC link is too high, which points to a problem with one of the input phases.^{[1][2][3][4][5]}

Also on: ACS310, ACS355 (same code 0022 and name SUPPLY PHASE); the ACS150 uses code 0022 with the name INPUT PHASE LOSS

Likely causes

• A mains phase missing
• Blown input fuse

First checks, in this order

1. Measure the voltage on all three input phases at U1, V1 and W1, ideally under load
2. Check the input fuses, the breaker and the contactor contacts
3. Check the supply terminals for loose connections

0023: ENCODER ERR

What it means: The drive is not getting a valid signal from the pulse encoder.^[1][2][5]

Also on: ACS355 (same code 0023 and name ENCODER ERR)

Likely causes

• Encoder missing, wired wrong (channels A and B swapped), loose or shorted
• Encoder signal voltage levels outside the specified range
• OTAC-01 pulse encoder interface module faulty or not connected properly
• Wrong pulse count in 5001 PULSE NR, or 5002 ENCODER ENABLE = 1 when no encoder is used

First checks, in this order

1. Check the encoder cable and the A and B channel wiring
2. Check that the OTAC-01 module is fitted properly and working
3. Check 5001 PULSE NR against the encoder data
4. If no encoder is used, check 5002 ENCODER ENABLE is not set to 1 (ENABLE)

0024: OVERSPEED

What it means: Motor speed went above 120% of the larger (in magnitude) of 2001 MINIMUM SPEED and 2002 MAXIMUM SPEED.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0024 and name OVERSPEED)

Likely causes

• Speed limits 2001 and 2002 set wrongly
• Not enough braking torque for the load
• Torque control used where it does not suit the application
• Brake chopper or brake resistor problem

First checks, in this order

1. Check 2001 MINIMUM SPEED and 2002 MAXIMUM SPEED
2. Check the brake chopper and brake resistor
3. Check whether torque control (9904 MOTOR CTRL MODE) is the right mode for this load

0026: DRIVE ID

What it means: Internal fault: the drive ID in the configuration block is not valid.^[1][2][3][4]

Also on: ACS150, ACS310 (same code 0026 and name DRIVE ID)

Likely causes

• Invalid drive ID in the internal configuration block

First checks, in this order

1. Write down the code and the fault history
2. Contact ABB service; the manual gives no user repair

0027: CONFIG FILE

What it means: Internal fault: the drive's internal configuration file has an error.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0027 and name CONFIG FILE)

Likely causes

• Error in the internal configuration file

First checks, in this order

1. Write down the code and the fault history
2. Contact ABB service; the manual gives no user repair

0028: SERIAL 1 ERR

What it means: Fieldbus communication has timed out and the drive tripped.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0028 and name SERIAL 1 ERR)

Likely causes

• Poor connections or electrical noise on the fieldbus line
• Communication settings wrong in Group 51 EXT COMM MODULE or Group 53 EFB PROTOCOL
• Fault response set in 3018 COMM FAULT FUNC with a short 3019 COMM FAULT TIME

First checks, in this order

1. Check the fieldbus cable, connectors, termination and shield
2. Check that the PLC or master is actually communicating with the drive
3. Check 3018 COMM FAULT FUNC and 3019 COMM FAULT TIME (default 3.0 s; shorter breaks are not treated as faults)
4. Check Group 51 (plug-in fieldbus adapter) or Group 53 (embedded fieldbus) settings

0029: EFB CON FILE

What it means: The drive could not read the configuration file for the embedded fieldbus.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0029 and name EFB CON FILE)

Likely causes

• Error reading the embedded fieldbus configuration file

First checks, in this order

1. Check the protocol selection in 9802 COMM PROT SEL and the Group 53 EFB PROTOCOL settings
2. Switch off for 5 minutes and power up again to see if the fault returns
3. If it returns, contact ABB service (the manual gives no corrective action)

0030: FORCE TRIP

What it means: A fault trip was forced by a command from the fieldbus.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0030 and name FORCE TRIP)

Likely causes

• The fieldbus master (PLC) sent a trip command

First checks, in this order

1. Check in the PLC program why the trip command was sent
2. See the fieldbus adapter user's manual for the trip command

0031-0033: EFB 1 / EFB 2 / EFB 3

What it means: Fault codes reserved for the embedded fieldbus protocol application; what each one means depends on the protocol in use.^[1][2][4]

Also on: ACS310 (same codes 0031 to 0033 and names EFB 1 to EFB 3)

Likely causes

• An error reported by the embedded fieldbus protocol application

First checks, in this order

1. Check which protocol is selected in 9802 COMM PROT SEL
2. Look up the code in the documentation for that embedded fieldbus protocol
3. Check the Group 53 EFB PROTOCOL settings and the bus wiring

0034: MOTOR PHASE

What it means: One of the motor phases is lost in the motor circuit.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 0034 and name MOTOR PHASE)

Likely causes

• Motor fault
• Motor cable fault or loose connection
• Fault in a thermal relay in the motor circuit, if one is used
• Internal drive fault

First checks, in this order

1. Switch off, wait 5 minutes and check all three motor connections at the drive, at any switch or contactor in the motor cable, and in the motor terminal box
2. Check the motor windings phase to phase for an open circuit
3. Check the thermal relay in the motor circuit, if used

0035: OUTP WIRING

What it means: While stopped, the drive found what looks like supply voltage connected to its motor output.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0035 and name OUTP WIRING)

Likely causes

• Input power connected to the output terminals by mistake
• False trip on a delta grounded supply with high motor cable capacitance

First checks, in this order

1. Switch off, wait 5 minutes and check that the supply goes to U1, V1, W1 and the motor to U2, V2, W2
2. Only if the wiring is right and the supply is delta grounded, 3023 WIRING FAULT can turn this check off (may void the warranty)

0036: INCOMPATIBLE SW

What it means: The drive cannot use its loaded software because the software is not compatible with the drive.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 0036 and name INCOMPATIBLE SW)

Likely causes

• Loaded software not compatible with the drive
• Internal fault

First checks, in this order

1. Write down the code and any recent software or firmware change
2. Contact ABB support

0037: CB OVERTEMP

What it means: The drive control board is overheated; the trip limit is 88 °C.^[1][2][5]

Also on: ACS355 (same code 0037 and name CB OVERTEMP)

Likely causes

• Ambient temperature too high
• Fan failure
• Air flow blocked

First checks, in this order

1. Check the cabinet or room temperature and the ventilation
2. Check the fan and clear the air path
3. The check is controlled by 3024 CB TEMP FAULT and does not apply to drives with an OMIO control board

0038: USER LOAD CURVE

What it means: The load condition set in 3701 USER LOAD C MODE (torque below the underload curve, above the overload curve, or both) has lasted longer than 3703 USER LOAD C TIME.^[1][2][4]

Also on: ACS310 (same code 0038 and name USER LOAD CURVE)

Likely causes

• Machine torque dropped below the underload curve or rose above the overload curve
• Load curve points 3704 to 3718 or the time 3703 set wrongly

First checks, in this order

1. Check the driven machine for the underload or overload the curve is watching
2. Check 3701 USER LOAD C MODE and 3703 USER LOAD C TIME
3. Check the curve points 3704 to 3718 against the real load

0101-0199: SYSTEM ERROR

What it means: An error internal to the drive.^{[1][2][3][4][5]}

Also on: ACS150, ACS310 and ACS355 list specific codes in this range under other names (0101 SERF CORRUPT, 0103 SERF MACRO)

Likely causes

• Internal drive error

First checks, in this order

1. Write down the exact error number
2. Contact ABB service and report the error number

0201-0299: SYSTEM ERROR

What it means: An error in the drive system.^{[1][2][3][4][5]}

Also on: ACS150, ACS310 and ACS355 list specific codes in this range under other names (0201 to 0204 DSP faults, 0206 CB ID ERROR, called MMIO ID ERROR on the ACS150)

Likely causes

• Drive system error

First checks, in this order

1. Write down the exact error number
2. Contact ABB service and report the error number

1000: PAR HZRPM

What it means: The speed or frequency limit parameters do not agree with each other or with the motor data.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 1000 and name PAR HZRPM)

Likely causes

• 2001 MINIMUM SPEED higher than 2002 MAXIMUM SPEED
• 2007 MINIMUM FREQ higher than 2008 MAXIMUM FREQ
• A limit more than 50 times the motor nominal speed 9908 or nominal frequency 9907

First checks, in this order

1. Compare 2001 with 2002 and 2007 with 2008
2. Check 9907 MOTOR NOM FREQ and 9908 MOTOR NOM SPEED against the nameplate
3. Check that 2001, 2002, 2007 and 2008 divided by the matching motor nominal value are not above 50

1001: PAR PFC REF NEG

What it means: 2007 MINIMUM FREQ is negative while pump and fan control (8123 PFC ENABLE) is active.^[1][2][4]

Also on: ACS310 (same code 1001 and name PAR PFC REF NEG)

Likely causes

• Negative 2007 MINIMUM FREQ with PFC enabled

First checks, in this order

1. Set 2007 MINIMUM FREQ to zero or a positive value
2. Check 8123 PFC ENABLE

1003: PAR AI SCALE

What it means: The analog input scaling is inconsistent: a minimum is set higher than its maximum.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 1003 and name PAR AI SCALE)

Likely causes

• 1301 MINIMUM AI1 higher than 1302 MAXIMUM AI1
• 1304 MINIMUM AI2 higher than 1305 MAXIMUM AI2

First checks, in this order

1. Compare 1301 with 1302
2. Compare 1304 with 1305

1004: PAR AO SCALE

What it means: The analog output scaling is inconsistent: a minimum is set higher than its maximum.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 1004 and name PAR AO SCALE)

Likely causes

• 1504 MINIMUM AO1 higher than 1505 MAXIMUM AO1
• 1510 MINIMUM AO2 higher than 1511 MAXIMUM AO2

First checks, in this order

1. Compare 1504 with 1505
2. Compare 1510 with 1511

1005: PAR PCU 2

What it means: The motor nominal current, voltage and power entered do not add up (improper motor nominal kVA or power).^[1][2][5]

Also on: ACS355 (same code 1005 and name PAR PCU 2)

Likely causes

• Wrong value in 9905 MOTOR NOM VOLT, 9906 MOTOR NOM CURR or 9909 MOTOR NOM POWER

First checks, in this order

1. Re-enter 9905, 9906 and 9909 from the motor nameplate
2. The manual's check: 9906 x 9905 x 1.73 divided by PN must be between 1.1 and 3.0, where PN = 1000 x 9909 for kW or 746 x 9909 for hp

1006: PAR EXT RO

What it means: Relay outputs 4 to 6 are programmed but the relay extension module is not connected.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 1006 and name PAR EXT RO)

Likely causes

• 1410 to 1412 RELAY OUTPUTS 4 to 6 set to non-zero values without the extension relay module fitted

First checks, in this order

1. Check whether the relay extension module (OREL-01) is fitted and connected
2. If it is not used, set 1410, 1411 and 1412 to 0

1007: PAR FIELDBUS MISSING

What it means: A parameter is set for fieldbus control, but no fieldbus protocol is selected.^[1][2][5]

Also on: ACS355 (same code 1007, shown as PAR FBUSMISS)

Likely causes

• For example 1001 EXT1 COMMANDS = 10 (COMM) while 9802 COMM PROT SEL = 0

First checks, in this order

1. Select the fieldbus protocol in 9802 COMM PROT SEL
2. Or set 1001 EXT1 COMMANDS and any other COMM selections back to I/O control

1008: PAR PFC MODE

What it means: Pump and fan control is enabled but the motor control mode is not scalar frequency control.^[1][2]

Likely causes

• 8123 PFC ENABLE active while 9904 MOTOR CTRL MODE is not 3 (SCALAR:FREQ)

First checks, in this order

1. Check whether pump and fan control is really wanted on this drive (8123 PFC ENABLE)
2. If it is, set 9904 MOTOR CTRL MODE to 3 (SCALAR:FREQ); if not, disable 8123 PFC ENABLE

1009: PAR PCU 1

What it means: The motor nominal frequency and nominal speed entered do not fit a real motor.^[1][2][5]

Also on: ACS355 (same code 1009 and name PAR PCU 1)

Likely causes

• Wrong value in 9907 MOTOR NOM FREQ or 9908 MOTOR NOM SPEED

First checks, in this order

1. Re-enter 9907 and 9908 from the motor nameplate
2. The manual's check: 60 x 9907 divided by 9908 must be between 1 and 16, and 9908 divided by (120 x 9907 / motor poles) must be between 0.8 and 0.992

1012: PAR PFC IO 1

What it means: The pump and fan control I/O setup is incomplete: not enough relays are set for PFC, or the relay settings conflict with the PFC motor settings.^[1][2][4]

Also on: ACS310 (same code 1012 and name PAR PFC IO 1)

Likely causes

• Too few relay outputs in Group 14 RELAY OUTPUTS set for PFC
• Conflict between Group 14, 8117 NR OF AUX MOT and 8118 AUTOCHNG INTERV

First checks, in this order

1. Count the PFC relays in Group 14 against 8117 NR OF AUX MOT
2. Check 8118 AUTOCHNG INTERV

1013: PAR PFC IO 2

What it means: The pump and fan control I/O setup is incomplete: the number of PFC motors does not match the PFC relays.^[1][2][4]

Also on: ACS310 (same code 1013 and name PAR PFC IO 2)

Likely causes

• 8127 MOTORS does not match the PFC motors set in Group 14 RELAY OUTPUTS and 8118 AUTOCHNG INTERV

First checks, in this order

1. Compare 8127 MOTORS with the PFC relays in Group 14
2. Check 8118 AUTOCHNG INTERV

1014: PAR PFC IO 3

What it means: The pump and fan control I/O setup is incomplete: the drive cannot assign an interlock digital input to each PFC motor.^[1][2][4]

Also on: ACS310 (same code 1014 and name PAR PFC IO 3)

Likely causes

• Not enough free digital inputs for 8120 INTERLOCKS with the number of motors in 8127 MOTORS

First checks, in this order

1. Check 8120 INTERLOCKS and 8127 MOTORS
2. Check which digital inputs are already used by other functions

1016: PAR USER LOAD C

What it means: The user load curve parameters are inconsistent.^[1][2][4]

Also on: ACS310 (same code 1016 and name PAR USER LOAD C)

Likely causes

• Load frequencies not in rising order: 3704 < 3707 < 3710 < 3713 < 3716
• A low torque point not below its high torque point (3705 < 3706, 3708 < 3709, 3711 < 3712, 3714 < 3715, 3717 < 3718)

First checks, in this order

1. Check that 3704, 3707, 3710, 3713 and 3716 rise in that order
2. Check that each LOAD TORQ LOW value is below its LOAD TORQ HIGH value

2001: OVERCURRENT

What it means: The current limit controller is active: the drive is holding back to stop the current going too high.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2001 and name OVERCURRENT)

Likely causes

• Too much load on the motor
• Acceleration time too short (2202 ACCELER TIME 1, 2205 ACCELER TIME 2)
• Faulty motor, motor cable or connections

First checks, in this order

1. Check the driven machine for overload
2. Lengthen 2202 ACCELER TIME 1 (and 2205 if used)
3. Check the motor and motor cable

2002: OVERVOLTAGE

What it means: The DC overvoltage controller is active, usually while the motor is slowing down.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2002 and name OVERVOLTAGE)

Likely causes

• Static or short transient overvoltage on the supply
• Deceleration time too short (2203 DECELER TIME 1, 2206 DECELER TIME 2)

First checks, in this order

1. Lengthen 2203 DECELER TIME 1 (and 2206 if used)
2. Measure the supply voltage for overvoltage or spikes

2003: UNDERVOLTAGE

What it means: The DC undervoltage controller is active because the supply voltage is low.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2003 and name UNDERVOLTAGE)

Likely causes

• Undervoltage on the mains

First checks, in this order

1. Measure the supply voltage on all three phases
2. Check fuses and supply connections

2004: DIR LOCK

What it means: Someone tried to change the motor direction, but direction changes are not allowed.^{[1][2][3][4][5]}

Also on: ACS310, ACS355 (same code 2004 and name DIR LOCK); the ACS150 shows code 2004 as DIRLOCK

Likely causes

• Reverse requested while 1003 DIRECTION allows one direction only

First checks, in this order

1. Do not request the direction change, or
2. Change 1003 DIRECTION to allow reversing, but only if reverse operation is safe for the machine

2005: IO COMM

What it means: Fieldbus communication has timed out, and the drive is set to warn instead of trip.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 2005 and name IO COMM)

Likely causes

• Poor connections or noise on the fieldbus line
• Communication settings wrong in Group 51 or Group 53
• Fault setup in 3018 COMM FAULT FUNC and 3019 COMM FAULT TIME

First checks, in this order

1. Check the fieldbus cable, connectors and shield
2. Check 3018 COMM FAULT FUNC and 3019 COMM FAULT TIME
3. Check Group 51 EXT COMM MODULE or Group 53 EFB PROTOCOL

2006: AI1 LOSS

What it means: Analog input 1 is lost or below its minimum, and 3001 is set to warn and keep running.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2006 and name AI1 LOSS)

Likely causes

• Broken wire or failed signal source on AI1
• 3021 AI1 FAULT LIMIT set above the real signal minimum

First checks, in this order

1. Check the input source and the AI1 wiring
2. Check 3021 AI1 FAULT LIMIT
3. Check 3001 AI<MIN FUNCTION; at 2 or 3 the drive keeps running at constant speed 7 or the last speed, so make sure that is safe

2008: PANEL LOSS

What it means: Communication with the control panel was lost, and 3002 is set to warn and keep running.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 2008 and name PANEL LOSS)

Likely causes

• Panel loose or unplugged, or its cable damaged
• Panel used as a control source while in remote (Group 10, Group 11)

First checks, in this order

1. Reseat the panel and check its cable
2. Check 3002 PANEL COMM ERR
3. In REM, check Group 10 START/STOP/DIR and Group 11 REFERENCE SELECT

2009: DEVICE OVERTEMP

What it means: The drive heatsink is hot and fault 0003 DEV OVERTEMP may be near; the alarm comes at 100 °C (212 °F) on frames R1 to R4 and 110 °C (230 °F) on R5 and R6.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2009 and name DEVICE OVERTEMP)

Likely causes

• Cooling fan failed
• Air flow blocked, or dirt and dust on the heatsink
• Ambient temperature too high
• Motor load too heavy

First checks, in this order

1. Check that the fan runs and the air path is clear
2. Read 0110 DRIVE TEMP
3. Plan a heatsink cleaning and check the cabinet temperature before it becomes a trip

2010: MOTOR TEMP

What it means: The motor is hot, from the drive's estimate or a sensor, and fault 0009 MOT OVERTEMP may be near.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2010 and name MOTOR TEMP)

Likely causes

• Motor overloaded
• Thermal model settings 3005 to 3009 do not match the motor
• Temperature sensor or Group 35 MOTOR TEMP MEAS settings

First checks, in this order

1. Check the motor load and current
2. Check the thermal model parameters 3005 to 3009
3. If a sensor is used, check it and Group 35, and read 0145 MOTOR TEMP

2012: MOTOR STALL

What it means: The motor is running in the stall region and fault 0012 MOTOR STALL may be near.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2012 and name MOTOR STALL)

Likely causes

• Load too heavy or the machine is binding
• Motor too small for the load

First checks, in this order

1. Check the driven machine for jams or binding
2. Check 3010 STALL FUNCTION (2 = alarm only), 3011 STALL FREQUENCY and 3012 STALL TIME

2013: AUTORESET

What it means: The drive is about to reset a fault automatically, which may start the motor.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2013 and name AUTORESET)

Likely causes

• Automatic reset is enabled in Group 31 AUTOMATIC RESET for the fault that just occurred

First checks, in this order

1. Keep clear of the machine, it may restart on its own
2. Check Group 31: 3101 NUMBER OF TRIALS, 3102 TRIAL TIME, 3103 DELAY TIME and 3104 to 3108 for which faults reset automatically
3. Note: this alarm is not shown on a relay output even when a relay is set to ALARM

2018: PID SLEEP

What it means: The PID sleep function is active, so the motor could speed up when sleep ends.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2018 and name PID SLEEP)

Likely causes

• The PID sleep function set in 4022 to 4026 or 4122 to 4126 has put the drive to sleep

First checks, in this order

1. Treat the motor as able to start at any time
2. Check the sleep settings 4022 to 4026 (PID set 1) or 4122 to 4126 (PID set 2)
3. Note: this alarm is not shown on a relay output even when a relay is set to ALARM

2021: START ENABLE 1 MISSING

What it means: The Start Enable 1 signal is missing, so the drive will not start.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 2021 and name START ENABLE 1 MISSING)

Likely causes

• The digital input set in 1608 START ENABLE 1 is off (for example an open interlock or a broken wire)
• Wrong digital input or communication setting

First checks, in this order

1. Check 1608 START ENABLE 1 to see which input or source is used
2. Check the digital input wiring and state
3. If the enable comes from the fieldbus, check the communication settings

2023: EMERGENCY STOP

What it means: An emergency stop command is active.^{[1][2][3][4][5]}

Also on: ACS150, ACS310, ACS355 (same code 2023 and name EMERGENCY STOP)

Likely causes

• The emergency stop input chosen in 2109 EMERG STOP SEL is active

First checks, in this order

1. Find out why the emergency stop was operated and make the machine safe
2. Release the emergency stop command; the drive also needs an external stop command before it can restart
3. Check 2109 EMERG STOP SEL and the stop ramp 2208 EMERG DEC TIME

2025: FIRST START

What it means: The drive is doing a First Start evaluation of the motor, which is normal the first time the motor runs after motor data is entered or changed.^[1][2][4][5]

Also on: ACS310, ACS355 (same code 2025 and name FIRST START)

Likely causes

• Motor parameters were just entered or changed

First checks, in this order

1. Let the evaluation finish; no repair is needed
2. See 9910 ID RUN for the motor model options