ABB ACS800 Drive Fault Codes List

Complete troubleshooting guide for ABB ACS800 industrial drive fault codes. Learn how to identify ACS800 error codes, reset procedures, and fix common VFD trips.

The ABB ACS800 is a high-performance industrial drive designed to handle the most demanding applications. Whether it is used in a single-drive configuration or a multi-drive system, the ACS800 utilizes advanced Direct Torque Control (DTC) to provide precise motor management. However, when the drive detects a deviation from normal operation, it triggers a fault code to prevent hardware damage.

If your machinery has stopped and you are facing a flashing LED or a code on the CDP-312R control panel, this guide to ABB ACS800 fault codes will help you diagnose the issue and restore operation quickly.

Understanding ACS800 Alarms and Faults

The ACS800 distinguishes between two levels of errors:

  • Warnings (Alarms): The drive display shows a warning message. The drive continues to run, but the issue should be investigated to prevent a hard trip.
  • Faults: The drive stops the motor immediately. The red LED on the drive or the control panel lights up. You must fix the cause and reset the drive before restarting.

Complete ABB ACS800 Fault Code List

Refer to the list below to identify the specific error code displayed on your ACS800. These codes are essential for maintaining heavy-duty industrial equipment.

Fault Code Cause & Solution
4210
ACS800 TEMP		 Cause: Drive IGBT temperature is excessive. Fault trip limit is 100%.

Solution:

1. Check ambient conditions.
2. Check air flow and fan operation.
3. Check heatsink fins for dust pick-up.
4. Check motor power against unit power.
8110
AI < MIN
FUNCTION		 Cause : Analogue control signal is below minimum allowed value due to incorrect signal level or failure in control wiring.

Solution:

1. Check for proper analogue control signal levels.
2. Check control wiring.
3. Check Fault Function parameters.
AD
[message]		 Cause: Message generated by an EVENT block in the  Adaptive Program.

Solution:

1. Consult the documentation or author of the Adaptive Program.
FFA3
BACKUP USED		 Cause: PC stored backup of drive parameters is downloaded into use.

Solution:

1. Wait until download is completed.
5581
BATT FAILURE		 Cause: APBU branching unit memory backup battery error caused by
- incorrect APBU switch S3 setting
- too low battery voltage.

Solution:

1. With parallel connected inverters, enable backup battery by setting actuator 6 of switch S3 to ON.
2. Replace backup battery.
7114
BC OVERHEAT		 Cause : Brake chopper overload.

Solution:

1. Stop drive.
2. Let chopper cool down.
3. Check parameter settings of resistor overload protection function (see parameter group 27 BRAKE CHOPPER).
4. Check that braking cycle meets allowed limits.
5. Check that drive supply AC voltage is not excessive.
FF74
BRAKE ACKN		 Cause : Unexpected state of brake acknowledge signal.

Solution:

1. See parameter group 42 BRAKE CONTROL.
2. Check connection of brake acknowledgement signal
7112
BR OVERHEAT		 Cause : Brake resistor overload.

Solution:

1. Stop drive.
2. Let resistor cool down.
3. Check parameter settings of resistor overload protection function (see parameter group 27 BRAKE CHOPPER).
4. Check that braking cycle meets allowed limits.
FF37
CALIBRATION
DONE		 Cause: Calibration of output current transformers is completed.

Solution:

1. Continue normal operation.
FF36
CALIBRATION
REQUIRED		 Cause: Calibration of output current transformers is required. Displayed at start if drive is in scalar control (parameter 99.04) and scalar fly start feature is on (parameter 21.08).

Solution: Calibration starts automatically. Wait for a while.
7510
COMMUNICATION
MODULE		 Cause : Cyclical communication between drive and master is lost.

Solution:

1. Check status of fieldbus communication.
2. Check parameter settings:
- group 51 COMM MODULE DATA(for fieldbus adapter)
- group 52 STANDARD MODBUS (for Standard Modbus Link).
3. Check Fault Function parameters.
4. Check cable connections.
5. Check if master can communicate
6. This is a programmable Fault Function, check parameter 30.18, 30.19
3211
DC BUS
LIMIT		 Cause : Drive limits torque due to too high or too low intermediate circuit DC voltage.

Solution:

1. Informative alarm
2. Check Fault Function parameters.
2330
EARTH FAULT		 Cause : Drive has detected load unbalance typically due to earth fault in motor or motor cable.

Solution:

1. Check there are no power factor correction capacitors or surge absorbers in motor cable.
2. Check that there is no earth fault in motor or motor cables:
- measure insulation resistances of motor and motor cable.
7310
ENCODER
CABLE		 Cause : Pulse encoder phase signal is missing.

Solution:

1. Check pulse encoder and its wiring.
2. Check pulse encoder interface module and its wiring.
3. This is a programmable Fault Function check parameter 50.07.
7302
ENCODER A<>B		 Cause: Pulse encoder phasing is wrong: Phase A is connected to terminal of phase B and vice versa.

Solution: Interchange connection of pulse encoder phases A and B.
7301
ENCODER
ERROR		 Cause : Communication fault between pulse encoder and pulse encoder interface module and between module and drive.

Solution:

1. Check pulse encoder and its wiring, pulse encoder interface module and its wiring, parameter group 50 ENCODER MODULE settings.
FF83
FAN OTEMP		 Cause : Excessive temperature of drive output filter fan. Supervision is in use in step-up drives.

Solution:

1. Stop drive. Let it cool down.
2. Check ambient temperature.
3. Check fan rotates in correct direction and air flows freely.
FF38
HW RECONF
RQ		 Cause: Inverter type (e.g. sr0025_3) has been changed. Inverter type is usually changed at factory or during drive implementation.

Solution: Wait until alarm POWEROFF! activates and switch control board power off to validate inverter type change.
FF32
ID DONE		 Cause : Drive has performed motor identification magnetisation and is ready for operation. This warning belongs to normal start-up procedure.

Solution: Continue drive operation.
FF31
ID MAGN		 Cause : Motor identification magnetisation is on. This warning belongs to normal start-up procedure.

Solution: Wait until drive indicates that motor identification is completed.
FF30
ID MAGN REQ		 Cause : Motor identification is required. This warning belongs to normal start-up procedure. Drive expects user to select how motor identification should be performed: By Identification Magnetisation or by ID Run.

Solution: Start Identification Magnetisation by pressing Start key, or select ID Run and start (see parameter 99.10).
FF68
ID N
CHANGED		 Cause: Drive ID number has been changed from 1.

Solution: Change ID number back to 1.
FF35
ID RUN		 Cause : Motor identification Run is on.

Solution:

1. Wait until drive indicates that motor identification Run is completed.
FF33
ID RUN SEL		 Cause : Motor Identification Run is selected, and drive is ready to start ID Run. This warning belongs to ID Run procedure.

Solution:

1. Press Start key to start Identification Run.
FF81
IN CHOKE
TEMP		 Cause: Excessive input choke temperature Stop drive.

Solution:

1. Let it cool down.
2. Check ambient temperature.
3. Check that fan rotates in correct direction and air flows freely.
2212
INV CUR
LIMIT		 Cause : Internal inverter current or power limit has been exceeded.

Solution:

1. Reduce load or increase ramp time.
2. Limit inverter actual power or decrease line- side converter reactive power generation reference value (parameter 95.06 LCU Q PW REF).
3. Check Fault Function parameters.

3200
INV
DISABLED		 Cause: Optional DC switch has opened while unit was stopped.

Solution:

1. Close DC switch.
2. Check AFSC-0x Fuse Switch Controller unit.
4290
INV OVERTEMP		 Cause : Converter module temperature is excessive.

Solution:

1. Check ambient temperature. If it exceeds 40°C, ensure that load current does not exceed derated load capacity of drive.
2. Check that ambient temperature setting is correct (parameter 95.10).
3. Check converter module cooling air flow and fan operation.
4. Cabinet installation: Check cabinet air inlet filters. Change when necessary.
5. Modules installed in cabinet by user: Check that cooling air circulation in cabinet has been prevented with air baffles.
6. Check inside of cabinet and heatsink of converter module for dust pick-up. Clean when necessary.
FF8B
IO CONFIG 		 Cause : Input or output of optional I/O extension or fieldbus module has been selected as signal interface in application program but communication to appropriate I/O extension module has not been set accordingly

Solution:

1. Check Fault Function parameters.
2. Check parameter group 98 OPTION MODULES.
FF69
MACRO CHANGE		 Cause: Macro is restoring or User macro is being saved.

Solution:

1. Wait until drive has finished task.
FF88
MOD
BOARD T		 Cause: Overtemperature in AINT board of inverter module.

Solution:

1. Check inverter fan.
2. Check ambient temperature.
FF89
MOD
CHOKE T		 Cause: Overtemperature in choke of liquid cooled R8i inverter module.

Solution:

1. Check inverter fan.
2. Check ambient temperature.
3. Check liquid cooling system.
2300
MOTOR CURRENT
LIMIT		 Cause : Drive limits motor current according to current limit defined by parameter 20.03 MAXIMUM CURRENT.

Solution:

1. Reduce load or increase ramp time.
2. Increase parameter 20.03 MAXIMUM CURRENT value.
3. Check Fault Function parameters.
4. This is a programmable Fault Function check parameter 30.23.
7121
MOTOR STALL		 Cause : Motor is operating in stall region due to e.g. excessive load or insufficient motor power.

Solution:

1. Check motor load and drive ratings.
2. Check Fault Function parameters.
3. This is a programmable Fault Function check parameter 30.10.
FF34
MOTOR STARTS		 Cause : Motor Identification Run starts. This warning belongs to ID Run procedure.

Solution: Wait until drive indicates that motor identification is completed.
4310
MOTOR TEMP		 Cause : Motor temperature is too high (or appears to be too high) due to excessive load, insufficient motor power, inadequate cooling or incorrect start-up data.

Solution:

1. Check motor ratings, load and cooling.
2. Check start-up data.
3. Check Fault Function parameters.
4312
MOTOR 1
TEMPERATURE		 Cause: Measured motor temperature has exceeded alarm limit set by parameter 35.02.

Solution:

1. Check value of alarm limit.
2. Check that actual number of sensors
corresponds to value set by parameter.
3. Let motor cool down.
4. Ensure proper motor cooling: Check cooling fan, clean cooling surfaces, etc.
4313
MOTOR 2
TEMPERATURE		 Cause: Measured motor temperature has exceeded alarm limit set by parameter 35.05.

Solution:

1. Check value of alarm limit.
2. Check that actual number of sensors
corresponds to value set by parameter.
3. Let motor cool down.
4. Ensure proper motor cooling: Check cooling fan, clean cooling surfaces, etc.
FF86
MOTOR POWER
LIMIT		 Cause: Drive limits motor power according to limits defined by parameters 20.11 and 20.12.

Solution:

1. This is a informative alarm
2. Check parameter 20.11 P MOTORING LIM and 20.12 P GENERATING LIM settings.
3. Check Fault Function parameters.
FF85
MOTOR TORQUE
LIMIT		 Cause: Drive limits motor torque according to calculated motor pull-out torque limit and minimum and maximum torque limits defined by parameters 20.13 and 20.14.

Solution:

1. Informative alarm
2. Check parameter 20.13 MIN TORQ SEL and 20.14 MAX TORQ SEL settings.
3. Check Fault Function parameters. If LIMIT WORD 1 bit 0 TORQ MOTOR LIM is 1,
- check motor parameter settings (parameter group 99 START-UP DATA)
- ensure that ID run has been completed successfully.
5300
PANEL LOSS		 Cause : Control panel selected as active control location for drive has ceased communicating.

Solution:

1. Check panel connection.
2. Check control panel connector.
3. Replace control panel in mounting platform.
4. Check Fault Function parameters.
FFD0
POINTER
ERROR		 Cause: Source selection (pointer) parameter points to non existing parameter index.

Solution:

1. Check source selection (pointer) parameter settings.
FF39
->POWEROFF!		 Cause: Inverter type (e.g. sr0025_3) has been changed. Inverter type is usually changed at factory or during drive implementation.

Solution: Switch control board power off to validate inverter type change.
5210
PPCC LINK		 Cause : Fiber optic link to INT board is faulty.

Solution:

1. Check fibre optic cables or galvanic link. With frame sizes R2-R6 link is galvanic.
2. If RMIO is powered from external supply, ensure that supply is on.
3. See parameter 16.09 - CTRL BOARD SUPPLY.
5482
PP OVERLOAD		 Cause : Excessive IGBT junction to case temperature. This can be caused by excessive load at low frequencies (e.g. fast direction change with excessive load and inertia).

Solution:

1. Increase ramp time.
2. Reduce load.
4280
REPLACE
FAN		 Cause : Running time of inverter cooling fan has exceeded its estimated life time

Solution:

1. Replace fan.
2. Reset fan run time counter 01.44.
FF8E
RUN ENABLE		 Cause : No Run enable signal received.

Solution:

1. Check setting of parameter 16.01.
2. Switch on signal or check wiring of selected source.
FF8C
SLEEP MODE		 Cause: Sleep function has entered sleeping mode.

Solution: See parameter group 40 PID CONTROL.
FF7A
START INHIBI		 Cause : Safe torque off function has been activated while drive was stopped. Or: Optional start inhibit hardware logic is activated.

Solution:

1. Close Safe torque off function switch.  If switch is closed and warning is still active, check power supply at ASTO board input terminals. Replace ASTO board.
2. Check start inhibit circuit (AGPS board).
FF8D
START
INTERLOCK		 Cause : No Start Interlock signal received.

Solution:

1. Check circuit connected to Start Interlock input on RMIO board.
FF87
SYNCRO SPEED		 Cause: Value of motor nominal speed set to parameter 99.08 is not correct: Value is too near synchronous speed of motor. Tolerance is 0.1%. This warning is active only in DTC mode.

Solution:

Check nominal speed from motor rating plate and set parameter 99.08 exactly accordingly.
4380
TEMP DIF
xx y		 Cause:

1. Excessive temperature difference between several parallel connected inverter modules. xx (1...12) refers to inverter module number and y refers to phase (U, V, W).
2. Alarm is indicated when temperature difference is 15°C. Fault is indicated when temperature difference is 20°C.
3. Excessive temperature can be caused e.g. by unequal current sharing between parallel connected inverters.

Solution:

1. Check cooling fan.
2. Replace fan.
3. Check air filters.
4311
THERMISTOR		 Cause: Motor temperature is excessive. Motor thermal protection mode selection is TEMP SENSOR.

Solution:

1. Check motor ratings and load.
2. Check start-up data.
3. Check thermistor connections to digital input DI6.
4. This is a programmable Fault Function check parameter 30.04…30.05.
FF91
T MEAS ALM		 Cause: Motor temperature measurement is out of acceptable range.

Solution:

1. Check connections of motor temperature measurement circuit. 
FF6A
UNDERLOAD		 Cause : Motor load is too low due to e.g. release mechanism in driven equipment.

Solution:

1. Check for problem in driven equipment.
2. Check Fault Function parameters.
2312
USER L
CURVE		 Cause: Integrated motor current has exceeded load curve defined by parameters in group 72 USER LOAD CURVE.

Solution:

1. Check parameter group 72 USER LOAD CURVE settings.
2. Reduce load.
DOWNLOADING
FAILED		 Cause: Download function of panel has failed. No data has been copied from panel to drive.

Solution:

1. Make sure panel is in local mode.
2. Retry (there might be interference on link).
DRIVE IS
RUNNING
DOWNLOADING
NOT POSSIBLE		 Cause: Downloading is not possible while motor is running.

Solution: Stop motor. Perform downloading.
NO
COMMUNICATION		 Cause: Cabling problem or hardware malfunction on Panel Link

Solution:

1. Check Panel Link connections.
2. Press RESET key. Panel reset may take up to half a minute, please wait.
NO FREE ID
NUMBERS ID
NUMBER
SETTING NOT
POSSIBLE		 Cause: Panel Link already includes 31 stations.

Solution: Disconnect another station from link to free ID number.
NOT UPLOADED
DOWNLOADING
NOT POSSIBLE		 Cause: No upload function has been performed.

Solution: Perform upload function before downloading.
UPLOADING
FAILED		 Cause: Upload function of panel has failed. No data has been copied from drive to panel.

Solution: Retry (there might be interference on link).
WRITE ACCESS
DENIED
PARAMETER
SETTING NOT
POSSIBLE		 Cause: Certain parameters do not allow changes while motor is running. If tried, no change is accepted, and warning is displayed.
Parameter lock is on.

Solution:

1. Stop motor, then change parameter value.
2. Open parameter lock (see parameter 16.02).
4210
ACS800 TEMP		 Cause : Drive IGBT temperature is excessive. Fault trip limit is 100%.

Solution:

1. Check ambient conditions.
2. Check air flow and fan operation.
3. Check heatsink fins for dust pick-up.
4. Check motor power against unit power.
8110
AI < MIN
FUNCTION		 Cause: Analogue control signal is below minimum allowed value due to incorrect signal level or failure in control wiring.

Solution:

1. Check for proper analogue control signal levels.
2. Check control wiring.
3. Check Fault Function parameters.
FFA2
BACKUP ERROR		 Cause: Failure when restoring PC stored backup of drive parameters.

Solution:

1. Retry.
2. Check connections.
3. Check that parameters are compatible with drive.
7114
BC OVERHEAT		 Cause : Brake chopper overload.

Solution:

1. Let chopper cool down.
2. Check parameter settings of resistor overload protection function (see parameter group 27 BRAKE CHOPPER).
3. Check that braking cycle meets allowed limits.
4. Check that drive supply AC voltage is not excessive.
7113
BC SHORT
CIRCUIT		 Cause : Short circuit in brake chopper IGBT(s).

Solution:

1. Replace brake chopper.
2. Ensure brake resistor is connected and not damaged.
FF74
BRAKE
acknowledge		 Cause : Unexpected state of brake acknowledge signal.

Solution:

1. See parameter group 42 BRAKE CONTROL.
2. Check connection of brake acknowledgement signal.
7110
BR BROKEN		 Cause : Brake resistor is not connected or it is damaged. Resistance rating of brake resistor is too high.

Solution:

1. Check resistor and resistor connection.
2. Check that resistance rating meets specifications.
7112
BR OVERHEAT		 Cause : Brake resistor overload.

Solution:

1. Let resistor cool down.
2. Check parameter settings of resistor overload protection function (see parameter group 27 BRAKE CHOPPER).
3. Check that braking cycle meets allowed limits.
4. Check that drive supply AC voltage is not excessive.
7111
BR WIRING		 Cause : Wrong connection of brake resistor.

Solution:

1. Check resistor connection.
2. Ensure brake resistor is not damaged.
FF82
CHOKE
OTEMP		 Cause: Excessive temperature of drive output filter. Supervision is in use in step-up drives.

Solution:

1. Let drive cool down.
2. Check ambient temperature.
3. Check filter fan rotates in correct direction and air flows freely.
7510
COMMUNICATION
MODULE		 Cause : Cyclical communication between drive and master is lost.

Solution:

1. Check status of fieldbus communication.
2. Check parameter settings:
- group 51 COMM MODULE DATA(for fieldbus adapter), or
- group 52 STANDARD MODBUS (for Standard Modbus Link).
3. Check Fault Function parameters.
4. Check cable connections.
5. Check if master can communicate.
4110
CTRL B
TEMP		 Cause : Control board temperature is above 88°C.

Solution:

1. Check ambient conditions.
2. Check air flow.
3. Check main and additional cooling fans.
2211
CURRENT
measurement		 Cause : Current transformer failure in output current measurement circuit.

Solution:

1. Check current transformer connections to Main Circuit Interface Board, INT

FF80
DC HIGH
RUSH		 Cause: Drive supply voltage is excessive. When supply voltage is over 124% of unit voltage rating (415, 500 or 690 V), motor speed rushes to trip level (40% of nominal speed).

Solution:

1. Check supply voltage level, drive rated voltage and allowed voltage range of drive.
3210
DC OVERVOLT		 Cause : Excessive intermediate circuit DC voltage.
DC overvoltage trip limit is 1.3 × 1.35 × U1max, where U1max is maximum value of supply voltage range. For 400 V units, U1max is 415 V. For 500 V units, U1max is 500 V. For 690 V units, U1max is 690 V. Actual voltage in intermediate circuit corresponding to the supply voltage trip level is 728 V DC for 400 V units, 877 V DC for 500 V units, and 1210 V DC for 690 V units.

Solution:

1. Check that overvoltage controller is on (parameter 20.05).
2. Check supply voltage for static or transient overvoltage.
3. Check brake chopper and resistor (if used).
4. Check deceleration time.
5. Use coast-to-stop function (if applicable).
6. Retrofit frequency converter with brake chopper and brake resistor.
3220
DC UNDERVOLT		 Cause : Intermediate circuit DC voltage is not sufficient due to missing supply voltage phase, blown fuse or rectifier bridge internal fault.

Solution:

1. Check main supply and fuses.
2330
EARTH FAULT		 Cause : Drive has detected load unbalance typically due to earth fault in motor or motor cable.

Solution:

1. Check there are no power factor correction capacitors or surge absorbers in motor cable.
2. Check that there is no earth fault in motor or motor cables:
- measure insulation resistances of motor and motor cable.
7310
ENCODER
CABLE		 Cause : Pulse encoder phase signal is missing.

Solution:

1. Check pulse encoder and its wiring.
2. Check pulse encoder interface module and its wiring.
7302
ENCODER A<>B		 Cause: Pulse encoder phasing is wrong: Phase A is connected to terminal of phase B and vice versa.

Solution: Interchange connection of pulse encoder phases A and B.
7301
ENCODER
ERROR		 Cause : Communication fault between pulse encoder and pulse encoder interface module and between module and drive.

Solution:

1. Check pulse encoder and its wiring, pulse encoder interface module and its wiring and parameter group 50 ENCODER MODULE settings.
9000
EXTERNAL
FAULT		 Cause : Fault in external device. (This information is configured through one of programmable digital inputs.)

Solution:

1. Check external devices for faults.
2. Check parameter 30.03 EXTERNAL FAULT
FF8F
FORCED TRIP		 Cause: Generic Drive Communication Profile trip command

Solution: See appropriate communication module manual.
FF53
GD DISABLED		 Cause: AGPS power supply of parallel connected R8i inverter module has been switched off during run. X (1…12) refers to inverter module number.

Solution:

1. Check Prevention of Unexpected Start-up circuit.
2. Replace AGPS board of R8i inverter module.
FF84
ID RUN
FAIL		 Cause : Motor ID Run is not completed successfully.

Solution:

1. Check maximum speed (parameter 20.02). It should be at least 80% of motor nominal speed (parameter 99.08).
FF81
IN CHOKE
TEMP		 Cause: Excessive input choke temperature Stop drive. Let it cool down.

Solution:

1. Check ambient temperature.
2. Check that fan rotates in correct direction and air flows freely.
5410
INT CONFIG		 Cause: Number of inverter modules is not equal to original number of inverters.

Solution:

1. Check status of inverters. See signal 04.01 FAULTED INT INFO.
2. Check fibre optic cables between APBU and inverter modules.
3. If Reduced Run function is used, remove faulted inverter module from main circuit and write number of remaining inverter modules into parameter 95.03 INT CONFIG USER.
4. Reset drive.
3200
INV DISABLED		 Cause: Optional DC switch has opened while unit was running or start command was given.

Solution:

1. Close DC switch.
2. Check AFSC-0x Fuse Switch Controller unit.
4290
INV OVERTEMP		 Cause : Converter module temperature is excessive.

Solution:

1. Check ambient temperature.
2. If it exceeds 40°C, ensure that load current does not exceed derated load capacity of drive.
3. Check that ambient temperature setting is correct (parameter 95.10).
4. Check converter module cooling air flow and fan operation.
5. Cabinet installation: Check cabinet air inlet filters. Change when necessary.
6. Modules installed in cabinet by user: Check that cooling air circulation in cabinet has been prevented with air baffles.
7. Check inside of cabinet and heatsink of converter module for dust pick-up. Clean when necessary.
8. Reset and restart after problem is solved and let converter module cool down.
7000
I/O COMM
ERROR		 Cause : Communication error on control board, channel CH1 Electromagnetic interference.

Solution:

1. Check connections of fibre optic cables on channel CH1.
2. Check all I/O modules (if present) connected to channel CH1.
3. Check for proper earthing of equipment. Check for highly emissive components nearby.
FF51
LINE CONV		 Cause: Fault on line side converter.

Solution:

1. Shift panel from motor side converter control board to line side converter control board.
2. See line side converter manual for fault description.
FF88
MOD
BOARD T		 Cause: Overtemperature in AINT board of inverter module.

Solution:

1. Check inverter fan.
2. Check ambient temperature.
FF89
MOD CHOKE T		 Cause: Overtemperature in choke of liquid cooled R8i inverter module.

Solution:

1. Check inverter fan.
2. Check ambient temperature.
3. Check liquid cooling system.
FF56
MOTOR PHASE		 Cause : One of motor phases is lost due to fault in motor, motor cable, thermal relay (if used) or internal fault.

Solution:

1. Check motor and motor cable.
2. Check thermal relay (if used).
3. Check Fault Function parameters. Disable this protection.
7121
MOTOR STALL		 Cause: Motor is operating in stall region due to e.g. excessive load or insufficient motor power.

Solution:

1. Check motor load and drive ratings.
2. Check Fault Function parameters.
4310
MOTOR TEMP		 Cause : Motor temperature is too high (or appears to be too high) due to excessive load, insufficient motor power, inadequate cooling or incorrect start-up data.

Solution:

1. Check motor ratings and load.
2. Check start-up data.
3. Check Fault Function parameters.
4312
MOTOR 1
TEMP		 Cause: Measured motor temperature has exceeded fault limit set by parameter 35.03.

Solution:

1. Check value of fault limit.
2. Let motor cool down.
3. Ensure proper motor cooling: Check cooling fan, clean cooling surfaces, etc.
4313
MOTOR 2
TEMP		 Cause: Measured motor temperature has exceeded fault limit set by parameter 35.06.

Solution:

1. Check value of fault limit.
2. Let motor cool down.
3. Ensure proper motor cooling: Check cooling fan, clean cooling surfaces, etc.
FF52
NO MOT
DATA		 Cause : Motor data is not given or motor data does not match with inverter data.

Solution:

1. Check motor data parameters 99.04...99.09.
2310
OVER CURRENT		 Cause : Output current exceeds trip limit.

Solution:

1. Check motor load.
2. Check acceleration time.
3. Check motor and motor cable (including phasing).
4. Check encoder cable (including phasing).
5. Check motor nominal values from group 99 START-UP DATA to confirm that motor model is correct.
6. Check that there are nopower factor correction or surge absorbers in motor cable.
7123
OVERFREQ		 Cause: Motor is turning faster than highest allowed speed due to incorrectly set minimum/ maximum speed, insufficient braking torque or changes in load when using torque reference.

Solution:

1. Check minimum/maximum speed settings.
2. Check adequacy of motor braking torque.
3. Check applicability of torque control.
4. Check need for brake chopper and resistor(s).
FF55
OVER SWFREQ		 Cause: Switching frequency is too high. Check motor parameter settings (parameter group 99 START-UP DATA)

Solution: Ensure that ID run has been completed successfully.
5300
PANEL LOSS		 Cause : Control panel or Drive Window selected as active control location for drive has ceased communicating.

Solution:

1. Check panel connection.
2. Check control panel connector.
3. Replace control panel in mounting platform.
4. Check Fault Function parameters.
5. Check Drive Window connection.
6320
PARAM CRC		 Cause: CRC (Cyclic Redundancy Check) error.

Solution:

1. Switch control board power off and on again.
2. Reload firmware to control board.
3. Replace control board.
3381
POWERFAIL		 Cause: INT board powerfail in several inverter units of parallel connected inverter modules.

Solution:

1. Check that INT board power cable is connected.
2. Check that POW board is working correctly.
3. Replace INT board.
5210
PPCC LINK		 Cause : Fiber optic link to INT board is faulty.

Solution:

1. Check fibre optic cables or galvanic link. With frame sizes R2-R6 link is galvanic.
2. If RMIO is powered from external supply, ensure that supply is on.
3. See parameter 16.09 CTRL BOARD SUPPLY.
5482
PP OVERLOAD		 Cause: Excessive IGBT junction to case temperature. This fault protects IGBT(s) and it can be activated by short circuit at output of long motor cables.

Solution:

1. Check motor cables.
2340
SHORT CIRCUIT		 Cause: Short-circuit in motor cable(s) or motor.

Solution:

1. Check motor and motor cable.
2. Check there are no power factor correction capacitors or surge absorbers in motor cable.
FF8A
SLOT OVERLAP		 Cause: Two option modules have same connection interface selection.

Solution:

1. Check connection interface selections in group 98 OPTION MODULES.
FF7A
START INHIBIT		 Cause : Safe torque off has been activated during motor run or motor start command has been given when Safe torque off is active. Or: Optional start inhibit hardware logic is activated.

Solution:

1. Close Safe torque off switch. If switch is closed and fault is still active, check power supply at ASTO board input terminals. Replace ASTO board.
2. Check start inhibit circuit (AGPS board).
3130
SUPPLY PHASE		 Cause : Intermediate circuit DC voltage is oscillating due to missing supply voltage phase, blown fuse or rectifier bridge internal fault.

Trip occurs when DC voltage ripple is 13% of DC voltage.

Solution:

1. Check main supply fuses.
2. Check for main supply imbalance.
4380
TEMP DIF
xx y		 Cause: Excessive temperature difference between several parallel connected inverter modules. xx (1...12) refers to inverter module number and y refers to phase (U, V, W).

Alarm is indicated when temperature difference is 15°C. Fault is indicated when temperature difference is 20°C

Excessive temperature can be caused e.g. by unequal current sharing between parallel connected inverters.

Solution:

1. Check cooling fan.
2. Replace fan.
3. Check air filters.
FF50
THERMAL MODE		 Cause: Motor thermal protection mode is set to DTC for high-power motor.

Solution: See parameter 30.05.
4311
THERMISTOR		 Cause: Motor temperature is excessive. Motor thermal protection mode selection is TEMP SENSOR.

Solution:

1. Check motor ratings and load.
2. Check start-up data.
3. Check thermistor connections to digital input DI6.
4. This is a programmable Fault Function, check parameter 30.04…30.05
FF6A
UNDERLOAD		 Cause :Motor load is too low due to e.g. release mechanism in driven equipment.

Solution:

1. Check for problem in driven equipment.
2. Check Fault Function parameters.
2312
USER L CURVE		 Cause: Integrated motor current has exceeded load curve defined by parameter group 72 USER LOAD CURVE.

Solution:

1. Check parameter group 72 USER LOAD CURVE settings.
2. After motor cooling time specified by parameter 72.20 LOAD COOLING TIME has elapsed, fault can be reset.
FFA1
USER MACRO		 Cause: No User Macro saved or file is defective.

Solution: Create User Macro.
FF54
Run Disabled		 Cause: No Run enable signal received.

Solution:

1. Check the setting of parameter 16.01. Switch on the signal or check the wiring of the selected source.
F010
ANTI JAM ON		 Cause: Anti jam function is active.

Solution: Wait until the function has finished.
F01A
AUTOCHANGE		 Cause: Autochange function is being performed.

Solution: Refer to the description of parameters 42.06 and 42.07.
FFFC
BRK LONG
TIME		 Cause: Brake acknowledge active after brake close delay has elapsed. Drive active with zero speed reference.

Solution:

1. See parameter group 42 BRAKE CONTROL.
2. Check connection of brake acknowledgement signal.
3. Check mechanical brake.
CTRL LOC
DIFF		 Cause: Master and Follower are not in the same control location.

Solution:

1. Check that the Master and the Follower are both in EXT2.
FFF8
FAST STOP		 Cause: Fast Stop Signal 10.10 activated.

Solution: Deactivate the Fast Stop signal.
FFFD
FLWR1 LIM/FLT		 Cause: Follower 1 has gone into a fault or has hit any of the limits. This message is displayed in the Master drive only

Solution: See Follower 1 drive for more detailed description of fault of limit.
FFFE
FLWR2 LIM/FLT		 Cause: Follower 2 has gone into a fault or has hit any of the limits. This message is displayed in the Master drive only

Solution:

1. See Follower 2 drive for more detailed description of fault of limit.
FFB5
FLWR3 LIM/FLT		 Cause: Follower 3 has gone into a fault or has hit any of the limits. This message is displayed in the Master drive only

Solution:

1. See Follower 3 drive for more detailed description of fault of limit.
FFB4
FLWR4 LIM/FLT		 Cause: Follower 4 has gone into a fault or has hit any of the limits. This message is displayed in the Master drive only

Solution:

1. See Follower 4 drive for more detailed description of fault of limit.
FFF6
HIGHEND LIMIT		 Cause: High-end limit Signal 10.12 activated in the Up direction

Solution:

1. Run the motor in the opposite direction and deactivate the High-end limit signal.
FFB1
HOMING ACTIVE		 Cause: Homing activation signal 10.21 activated in EXT 1 control

Solution: Homing sequence is activated. Start the drive and complete the homing sequence. After homing sequence is done deactivate the homing active signal.
FFB0
HOMING DONE		 Cause: Homing sequence is completed in EXT 1 control. The position is initialized to the value define in par 78.10.

Solution: Homing sequence is completed. Deactivate the homing active signal and continue operation.
FFF7
LOWEND LIMIT		 Cause: Low-end limit Signal 10.13 activated in the down direction

Solution: Run the motor in the opposite direction and deactivate the Low-end limit signal.
FFFA
OYSTICK CHECK		 Cause: Hardware error in the configured joystick.

Solution: Check joystick connection.
FFB8
LOAD SP UP
LIMIT		 Cause: The speed reference is limited in the forward direction according to the Load speed control function.

Solution:

1. Check motor current settings and group 77 settings.
FFB9
LOAD SP DW
LIMIT		 Cause: The speed reference is limited in the reverse direction according to the Load speed control function.

Solution:

1. Check motor current settings and group 77 settings.
FFB2
MASTERLIM/FLT		 Cause: Master drive has gone into a fault or has hit any of the limits. This message is displayed in the Follower drives only

Solution:

1. See Master drive for more detailed description of fault of limit.
FFF4
SLOW DOWN UP		 Cause: Slowdown signal 10.09 activated in the Up direction.

Solution: Run the motor in the opposite direction and deactivate the Slowdown signal. Or let the drive run in the limited speed reference.
FFF5
SLOW DOWN
DOWN		 Cause: Slowdown signal 10.09 activated in the down direction.

Solution: Run the motor in the opposite direction and deactivate the Slowdown signal. Or let the drive run in the limited speed reference.
FFB3
START HIGH		 Cause: The Start command is active when the drive is powered ON. The Start command remains ON after a fault or fast stop has occurred and a reset is done.

Solution: Start command should be made OFF and then can be made ON for a start sequence.
FFFB
ZERO POS
WARNING		 Cause: Start command with incorrect Zero position input.

Solution:

1. Check for Zero position DI.
FFF3
BRAKE SLIP
FLT		 Cause: The brake slipped and the motor speed exceeded the motor slip speed 42.11 for a period of slip fault delay 42.12 time.

Solution:

1. Check brakes.
FFBA
FLWR1 COM
FLT		 Cause: Follower 1 Communication error.

Solution:

1. Check CH2 communication, communication settings.
FFBB
FLWR2 COM
FLT		 Cause: Follower 2 Communication error.

Solution:

1. Check CH2 communication, communication settings.
FFBc
FLWR3 COM
FLT		 Cause: Follower 3 Communication error.

Solution:

1. Check CH2 communication, communication settings.
FFBd
FLWR4 COM
FLT		 Cause: Follower 4 Communication error.

Solution:

1. Check CH2 communication, communication settings.
FFBF
INV LIMIT		 Cause: The fault is generated when the drive has hit TORQUE INVERTER CURRENT LIMIT or IPP OVERTEMP ALM is active and a period of 200 ms has elapsed. The fault condition is only checked when the generating power is more than 10% of motor nominal power and the speed is greater than 5% of the maximum speed.

Solution:

1. Check the Speed controller torque settings.
2. Check torque, speed, power limit settings.
FFF0
MOTOROVER
SPD		 Cause: The speed exceeds the MOT OVERSPEED LEV (Par. 74.01).

Solution:

1. Check Torque and Current limit settings
2. Check motor and motor cables
3. Check pulse encoder connections if used.
FF7D
SAFETYCLS FLT		 Cause: When an encoder is not used and the actual speed is below 1% of the max speed for more than 2 seconds with the Start command active, the drive trips on SAFETYCLS FLT.

Solution:

1. Check references.
2. Check motor model settings.
FFF1
SPD MATCH
FLT		 Cause: If speed error at set point is higher than SP DEV LEV (Par. 75.02) or the actual speed change per second during acceleration/ deceleration is less than SPD CHG PER SEC (Par. 75.04) for a time longer than SPD MATCH FLT TD (Par. 75.03) the drive will trip for SPD MATCH FLT.

Solution:

1. Check ramp times.
2. Check Torque and Current limit settings.
FFBE
SYNC FAULT		 Cause: Synchronisation error of Follower drive. The error in position of the Follower drive is greater than the allowed limits.

Solution:

1. Check the Synchro error limits.
2. Check encoder connections.
FFF2
TORQ PROVE
FLT		 Cause: If Torque proving is not successful, that means torque does not reach the test level within the time TORQ PROV FLT TD (Par. 76.02), the drive will trip. (Normally only used if active load, for example, hoist drive, with pulse encoder feedback.

Solution:

1. Check motor and motor cables.
2. Check if setting of parameter 21.2 Control Magnetising time is to low.
F012
F TO MS
CM LOSS		 Cause: In a Multipump configuration, the master does not receive messages from a follower.

Solution:

1. Check the fibre optic cabling between the drives on the Multipump link. If the drives are connected in a ring, check that all drives are powered.

F014
HIGH
LEVEL DI		 Cause: Level in a tank has reached the high level connected to Digital Input.

Solution: If the level is not high in the tank, check the sensor or cable condition from sensor to DI.
F01B
INLET LOW
&
F01D
INLET VERY
LOW		 Cause: Pressure at pump/fan inlet too low. Check for a closed valve on the inlet side of the pump/fan.

Solution:

1. Check piping for leaks.
2. Check parameters 44.01…44.06.
F015
LOW LEVEL DI		 Cause: Level in a tank has reached the low level connected to Digital Input.

Solution:

1. If the level is not low in the tank, check the sensor or cable condition from sensor to DI.
F011
MS INV LOSS		 Cause: The drive cannot detect a master on a Multipump link, and is not itself allowed to become master.

Solution:

1. Check fibre optic cabling between the drives on the Multipump link.
2. Check that a sufficient number of drives are allowed to become master on the link.
3. Check parameter 60.17.
F01C
OUTLET HIGH
&
F01E
OUTLET VERY
HIGH		 Cause: Pressure at pump/fan outlet too high.

Solution:

1. Check piping for blocks.
2. Check parameters 44.08…44.14
F019
SLEEP BOOST		 Cause: Sleep boost is active.

Solution: This is a informative alarm.
F012
F TO MS
CM LOSS		 Cause: In a Multipump configuration, the master does not receive messages from a follower.

Solution:

1. Check the fibre optic cabling between the drives on the Multipump link. If the drives are connected in a ring, check that all drives are powered.
F01B
INLET LOW
&
F01D
INLET VERY LOW		 Cause: Pressure at pump/fan inlet too low.

Solution:

1. Check for a closed valve on the inlet side of the pump/fan.
2. Check piping for leaks.
3. Check parameters 44.01…44.06
F011
MS INV LOSS		 Cause: Drive cannot detect a master on a Multipump link, and is not itself allowed to become master.

Solution:

1. Check the fibre optic cabling between the drives on the Multipump link. If the drives are connected in a ring, check that all drives are powered.
2. Check that a sufficient number of drives are allowed to become master on the link.
3. Check parameter 60.17
F01C
OUTLET HIGH
&
F01E
OUTLET VERY
HIGH		 Cause: Pressure at the pump/fan outlet too high.

Solution:

1. Check piping for blocks.
2. Check parameters 44.08… 44.14.
F013
SHARE IO COM		 Cause: Analogue input data sharing is enabled but no data can be received.

Solution:

1. Check the fibre optic cabling between the drives.
2. Check the analogue input signal wiring.
F016
START SEL
WRG		 Cause: Pulse-type start/stop command is selected for external control location 2 (EXT2) when either the Multipump or Level control macro is active.

Solution:

1. Select a non-pulse start/stop source at parameter 10.02 EXT 2 STRT/STP/DI.

 

How to Reset an ABB ACS800 Drive

Once you have identified and corrected the issue (such as replacing a blown fuse or clearing a motor jam), you can reset the drive using one of these methods:

  1. Control Panel: Press the RESET key on the CDP-312R control panel.
  2. Digital Input: If Parameter 30.05 (Fault Reset Select) is configured, you can reset the drive via an external signal.
  3. Fieldbus: If the drive is connected to a PLC (via Profibus, Modbus, etc.), toggle the Reset bit in the Control Word.
  4. Power Cycle: Switch off the input power, wait for the DC bus capacitors to discharge (approx. 5 minutes), then restore power.

Specific Troubleshooting for Large ACS800 Units

Because the ACS800 is an industrial-grade drive, pay special attention to these common failure points:

  • Cooling Fans: High-power ACS800 units generate significant heat. A failure in the main cooling fan or the cabinet fan will quickly lead to "OVERTEMP" faults.
  • Fiber Optic Links: In multi-drive systems or high-frame-size units (like R7 or R8), ensure the fiber optic cables between the control board and power units are clean and not bent.
  • DC Bus Capacitors: If you see frequent "DC UNDERVOLT" or "DC OVERVOLT" on older units, it may indicate that the capacitors need reforming or replacement.
High Voltage Warning: The ACS800 contains large capacitors that hold a lethal charge even after power is removed. Always wait 5 minutes and verify with a multimeter before touching internal terminals.

Conclusion

Maintaining the ABB ACS800 fault codes and troubleshooting manual nearby is essential for any industrial maintenance team. By acting quickly on these codes, you can protect your high-value motors and keep your production line moving.

 

 

 

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