Comprehensive list of common fault codes for Parker AC890 series AC drives, including causes, troubleshooting steps, and safety considerations. Quickly diagnose and resolve drive issues to minimize downtime.
Parker AC890 drive fault codes
Below list shows fault codes and their solutions of Parker AC890 drive fault codes:
6511 Keypad Display |
6901 Keypad Display |
Description |
Possible Reason for Trip |
DCHI |
OVERVOLTAGE |
The drive internal dc link voltage is too high |
¨ The supply voltage is too high ¨ Trying to decelerate a large inertia load too quickly ¨ The brake resistor is open circuit |
DCLO |
UNDERVOLTAGE |
The drive internal dc link voltage is too low |
¨ The supply voltage is too low ¨ The supply has been lost ¨ A supply phase is missing |
OC |
OVERCURRENT |
The motor current being drawn from the drive is too high |
¨ Trying to accelerate a large inertia load too quickly ¨ Trying to decelerate a large inertia load too quickly ¨ Application of shock load to motor ¨ Short circuit between motor phases ¨ Short circuit between motor phase and earth ¨ Motor output cables too long or too many parallel motors connected to the drive ¨ Fixed or auto boost levels are set too high |
STO |
SAFE TORQUE OFF |
Safe Torque Off (STO) is active. |
¨ One or both STO user inputs is low ¨ A fault has been detected in the STO circuit |
HOT |
HEATSINK |
The drive heatsink temperature is too high |
¨ The ambient air temperature is too high ¨ Poor ventilation or spacing between drives |
ET |
EXTERNAL TRIP |
User trip caused via control terminals |
¨ +24V not present on external trip (terminal X15/05) ¨ Check setting of EXT TRIP MODE parameter |
IN 1 |
INPUT 1 BREAK |
I/O TRIPS:: INPUT 1 BREAK has gone True |
¨ Check configuration to determine source of signal |
IN 2 |
INPUT 2 BREAK |
I/O TRIPS:: INPUT 2 BREAK has gone True |
¨ Check configuration to determine source of signal |
STLL |
MOTOR STALLED |
The motor has stalled (not rotating) |
¨ Motor loading too great ¨ Current limit level is set too low ¨ Stall trip duration is set too low ¨ Fixed or auto boost levels are set too high |
IT |
INVERSE TIME |
|
¨ The inverse time current limit is active: motor loading is too great; fixed or auto boost levels are too high (Full Load Current = 150% for 60 seconds) |
DB R |
BRAKE RESISTOR |
External dynamic braking resistor has been overloaded |
¨ Trying to decelerate a large inertia load too quickly or too often |
DB S |
BRAKE SWITCH |
Internal dynamic braking switch has been overloaded |
¨ Trying to decelerate a large inertia load too quickly or too often |
DISP |
OP STATION |
Keypad has been disconnected from drive whilst drive is running in local control |
¨ Keypad accidentally disconnected from drive |
SCI |
COMMS BREAK |
|
¨ COMMS BREAK parameter set to True (refer to I/O TRIPS menu at level 3) |
CNTC |
CONTACTOR FBK |
|
¨ The CONTACTOR CLOSED input in the SEQUENCING LOGIC function block remained FALSE after a run command was issued |
SPD |
SPEED FEEDBACK |
|
¨ SPEED ERROR > 50.00% for 10 seconds |
AOT |
AMBIENT TEMP |
|
¨ The ambient temperature in the drive is too high |
OT |
MOTOR OVERTEMP |
The motor temperature is too high |
¨ Excessive load ¨ Motor voltage rating incorrect ¨ FIXED BOOST and/or AUTO BOOST set too high ¨ Prolonged operation of the motor at low speed without forced cooling ¨ Check setting of INVERT THERMIST parameter in I/O TRIPS menu at level 3. ¨ Break in motor thermistor connection |
I HI |
CURRENT LIMIT |
V/Hz mode only: If the current exceeds 180% of induction stack rated current for a period of 1 second, the drive will trip. This is caused by shock loads |
¨ Remove the cause of the shock load |
A24SC |
24V FAILURE |
The 24V customer output has fallen below 17V |
¨ 24V customer output is short circuited ¨ Excessive loading |
LSPD |
LOW SPEED OVER I |
The motor is drawing too much current (>100%) at zero output frequency |
¨ FIXED BOOST and/or AUTO BOOST set too high (refer to FLUXING menu at level 3) |
PHAS |
PHASE FAIL |
|
¨ One or more input phases not present |
ENC 1 |
FBK ENCODER FAIL |
|
¨ Encoder fault |
SHRT |
DESAT (OVER I) |
|
¨ Instantaneous overcurrent. Refer to OVERCURRENT in this table |
DCRP |
VDC RIPPLE |
|
¨ The dc link ripple voltage is too high. Check for a missing input phase. |
DBSC |
BRAKE SHORT CCT |
Brake resistor overcurrent |
¨ Check brake resistance is not less than minimum value allowed ¨ check wiring and brake resistor for earth faults |
OSPD |
OVERSPEED |
|
¨ Speed feedback > 150% for 0.1 seconds |
ANIN |
ANALOG INPUT ERR |
|
¨ 4-20mA analog input current > 22mA could damage the input circuit |
DBCT |
INT DB RESISTOR |
¨ Braking mode set to INTERNAL (future use only). Set to EXTERNAL and connect an External Braking Resistor if braking is required. |
TRIP |
UNKNOWN |
¨ An unknown trip - refer to Parker Hannifin Manufacturing |
TR32 |
OTHER |
¨ Refer to OTHER in Appendix D: TRIPS STATUS. One or more trips have occurred with a Value greater than 32. See the list. |
ATN1 |
MAX SPEED LOW |
¨ During Autotune the motor is required to run at the nameplate speed o f the motor. If MAX SPEED RPM limits the speed to less than this value, an error will be reported. Increase the value of MAX SPEED RPM up to the nameplate rpm of the motor (as a minimum). It may be reduced, if required, after the Autotune is complete. |
ATN2 |
MAINS VOLTS LOW |
¨ The mains input voltage is not sufficient to carry out the Autotune. Re-try when the mains have recovered. |
ATN 3 |
NOT AT SPEED |
¨ The motor was unable to reach the required speed to carry out the Autotune. Possible reasons include: motor shaft not free to turn; the motor data is incorrect |
ATN4 |
MAG CURRENT FAIL |
¨ It was not possible to find a suitable value of magnetising current to achieve the required operating condition for the motor. Check the motor data is correct, especially nameplate rpm and motor volts. Also check that the motor is correctly rated for the drive. |
ATN5 |
NEGATIVE SLIP F |
¨ Autotune has calculated a negative slip frequency, which is not valid. Nameplate rpm may have been set to a value higher than the base speed of the motor. Check nameplate rpm, base frequency, and pole pairs are correct. |
ATN6 |
TR TOO LARGE |
¨ The calculated value of rotor time constant is too large. Check the value of nameplate rpm. |
ATN7 |
TR TOO SMALL |
¨ The calculated value of rotor time constant is too small. Check the value of nameplate rpm. |
ATN8 |
MAX RPM DATA ERR |
¨ This error is reported when the MAX SPEED RPM is set to a value outside the range for which Autotune has gathered data. Autotune gathers data on the motor characteristics up to 30% beyond “max speed rpm”. If MAX SPEED RPM is later increased beyond this range, the drive had no data for this new operating area, and so will report an error. To run the motor beyond this point it is necessary to re-autotune with MAX SPEED RPM set to a higher value. |
STAC |
STACK TRIP |
¨ The drive was unable to distinguish between an overcurrent/desat or overvoltage trip |
ATNA |
LEAKGE L TIMEOUT |
¨ The leakage inductance measurement requires a test current to be inserted into the motor. It has not been possible to achieve the required level of current. Check that the motor is wired correctly. |
PLOS |
POWER LOSS STOP |
¨ Power Loss Stop sequence has ramped Speed Setpoint to zero or timed out |
ATNC |
MOTR TURNING ERR |
¨ The motor must be stationary when starting the Autotune |
ATND |
MOTR STALLED ERR |
|
¨ The motor must be able to rotate during Autotune |
ATNE |
AT TORQ LIM ERR |
|
¨ The motor is in torque limit during Autotune |
ECAL |
FBK ENCODR CAL |
The drive has failed to set absolute position |
¨ Check the encoder supports absolute position, and that the encoder is wired correctly. |
GEAR |
OUTPUT GBX ERROR |
|
¨ A non-unity output gearbox is not supported if the encoder direction is reversed. |
APP |
APP HALTED |
|
¨ The application has been halted by the DSE Configuration Tool |
AERR |
APP ERROR |
|
¨ The application has ceased execution due to an error |
FERR |
FIRMWARE ERROR |
|
¨ The firmware in the drive has stopped executing |
RSLV |
RESOLVER ERROR |
See function block description |
¨ Resolver disconnected ¨ Resolver incorrectly wired ¨ Resolver not compatible with resolver feedback option board ¨ Resolver length cable too long ¨ Incorrect Resolver Function Block settings |
MI2T |
I2T MOTOR TRIP |
See function block description |
¨ Motor is undersized |
STO |
SAFE TORQUE OFF |
- |
¨ The safe torque off feature has been activated. See Chapter 6, STO Trip Annunciation. |
REFC |
REF ENCODER CAL |
The drive has failed to set absolute position |
¨ Check the encoder supports absolute position, and that the encoder is wired correctly. |
REFF |
REF ENCODER FAIL |
- |
¨ Function not implemented |
DCFG |
DRIVE CONFIG ERR |
Drive configuration error |
¨ The configuration defined in DRIVE CONFIG doesn't match the actual drive configuration. |
CT1 |
CUST TRIP 1 |
See function block description |
|
CT2 |
CUST TRIP 2 |
See function block description |
|
CT3 |
CUST TRIP 3 |
See function block description |
|
CT4 |
CUST TRIP 4 |
See function block description |
|
CT5 |
CUST TRIP 5 |
See function block description |
|
CT6 |
CUST TRIP 6 |
See function block description |
|
CT7 |
CUST TRIP 7 |
See function block description |
|
DCHI |
OVERVOLTAGE |
The shared dc link voltage is too high |
The supply voltage is too high Trying to decelerate a large inertia load too quickly The brake resistor is open circuit |
OC |
OVERCURRENT |
The current being drawn from the drive is too high |
|
HOT |
HEATSINK |
The heatsink temperature is too high |
|
IT |
INVERSE TIME |
High output current for prolonged period, (warning only) |
|
DISP |
DISPLAY / KEYPAD |
Keypad has been disconnected from drive whilst drive is running in local control |
Loose connection to display |
SCI |
LOST COMMS |
Not used |
|
T 6 |
24V FAILURE |
The 24V customer output has fallen below 17V |
|
T 4 |
VOLTS SEL SWITCH |
Failure to read voltage selector switch |
May be caused by excessive loading on ANOUT |
PHAS |
PHASE LOSS |
|
|
CHRG |
CHARGING |
Failed to charge DC link |
Excessive capacitance on DC link Short circuit on DC link |
DCRP |
VDC RIPPLE |
Excessive DC link ripple |
Driving a reciprocating load |
AOUT |
ANOUT FAULT |
Overload on analog output |
|
VOLT |
VOLTS SELECTION |
Invalid position on volts selector switch |
|
ENCI |
ENC NEEDS INIT |
PMAC motor used with a relative encoder – Needs to run init once per power cycle |
Relative encoder needs to be aligned with the motor back EMF. Use MOT POLARISATION feature to align |
COMMS FAULT CODE N |
The drive has not responded to a message from the 6901 |
Drive CPU busy. |
COMMS FAULT CODE C |
Incorrect reply from drive following a selection (command) message from the 6901 |
|
COMMS FAULT CODE P |
Parity error in message received from the drive by the 6901 |
|
COMMS FAULT CODE F |
Format of message received from the drive by the 6901 is incorrect |
Unexpected, due to electrical interference |
|
BCC (block check character) in message received from the drive by the 6901 is incorrect |
|
COMMS FAULT CODE B |
|
|
COMMS FAULT CODE L |
Length of message received from the drive by the 6901 is incorrect (too many characters) |
|