INVT MH860A Series Hydraulic Servo Drive

INVT MH860A Series Hydraulic Servo Drive Fault Codes:

Fault Code and MeaningCause and Remedy
Err01
IPM fault
Cause: The instantaneous output of the power module exceeds the short-circuit current.


Remedy:

  • Check for short circuits in motor wiring.

  • Check power module condition.
Err02
Overcurrent
Cause: The output current exceeds the allowed working current of drive.


Remedy:

  • Check motor load and drive capacity.

  • Check for mechanical jamming.
Err03
DC overvoltage
Cause: The DC voltage on the main circuit is abnormally high.


Remedy:

  • Check input power supply voltage.

  • Check braking resistor/unit.
Err04
DC undervoltage
Cause: When the motor is powered on to run, the DC voltage on the main circuit decreases lower than the protection value.


Remedy:

  • Check input power supply stability.

  • Check wiring connections.
Err05
FWD overspeed
Cause: The motor rotation speed exceeds the forward speed protection value.


Remedy:

  • Check speed command settings.

  • Check motor parameters.
Err06
Module overtemperature
Cause: The drive temperature exceeds the module protection temperature.


Remedy:

  • Check cooling fan operation.

  • Check ambient temperature.
Err07
Motor overtemperature
Cause: The motor temperature exceeds the motor protection temperature.


Remedy:

  • Check motor load (overload).

  • Check motor cooling sensor/wiring.
Err08
Software fault
Cause: The drive software runs abnormally.


Remedy:

  • Power cycle the drive.

  • Contact technical support.
Err09
CAN fault
Cause: The drive reports the fault upon a CAN communication exception when the process command mode is continuous CAN communication input or multi-pump joint application.


Remedy:

  • Check CAN bus wiring and termination.

  • Check communication settings.
Err10
Reserved
Cause: –


Remedy:

  • Reserved.
Err11
Self-check fault
Cause: The internal hardware of drive is abnormal.


Remedy:

  • Contact local dealer or service personnel.
Err12
Task re-entry
Cause: An error occurred when invoking a software program.


Remedy:

  • Power cycle the drive.

  • Contact service if persistent.
Err13
System overpressure
Cause: The system pressure exceeds the overpressure protection threshold.


Remedy:

  • Check hydraulic system pressure settings.

  • Check pressure sensor feedback.
Err14
REV overspeed
Cause: The motor rotation speed exceeds the reverse speed protection value.


Remedy:

  • Check speed limits.

  • Check motor tuning.
Err15
Pressure sensor fault
Cause: The pressure sensor is incorrectly wired or damaged.


Remedy:

  • Check sensor wiring.

  • Replace pressure sensor.
Err16
Braking pipe fault
Cause: The braking pipe is damaged.


Remedy:

  • Inspect braking hardware.
Err17
AC overvoltage
Cause: The input AC voltage exceeds AC overvoltage protection.


Remedy:

  • Check grid voltage.
Err18
EEPROM error
Cause: There is a drive EEPROM data exception.


Remedy:

  • Reset factory parameters.

  • Contact service personnel.
Err19
Reserved
Cause: –


Remedy:

  • Reserved.
Err20
AC undervoltage
Cause: The input AC voltage is lower than AC undervoltage protection.


Remedy:

  • Check power supply connections.

  • Check for voltage dips.
Err21
Braking resistor overload
Cause: The braking resistor overload rate exceeds the braking resistor overload threshold.


Remedy:

  • Check braking cycle duty.

  • Check resistor sizing.
Err22
Node fault
Cause: In multi-pump parallel connection application, if a slave node encounters a fault, the master drive reports it.


Remedy:

  • Check slave drives for faults.
Err23
Input phase loss
Cause: Input phase loss occurs or three phases are unbalanced.


Remedy:

  • Check input power wiring (R, S, T).
Err24
Reserved
Cause: –


Remedy:

  • Reserved.
Err25
RS485 communication fault
Cause: The drive encounters an RS485 communication exception when the process command mode is continuous RS485 communication input.


Remedy:

  • Check RS485 wiring.

  • Check baud rate and address settings.
Err26
Current feedback channel fault
Cause: The zero drift in power-on self-check is too great.


Remedy:

  • Check internal current sensors (Service required).
Err27 – Err32
Reserved
Cause: –


Remedy:

  • Reserved.
Err33
Resolver sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the resolver sampling value fluctuates greatly.


Remedy:

  • Check resolver wiring/shielding.

  • Check for interference.
Err34
Phase-A current sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the phase-A current sampling value fluctuates greatly.


Remedy:

  • Check current sensor circuit.
Err35
Phase-B current sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the phase-B current sampling value fluctuates greatly.


Remedy:

  • Check current sensor circuit.
Err36
Phase-A current sampling zero drift fault
Cause: When the drive is tested in diagnosis mode, the phase-A current sampling zero drift is too great.


Remedy:

  • Recalibrate or contact service.
Err37
Phase-B current sampling zero drift fault
Cause: When the drive is tested in diagnosis mode, the phase-B current sampling zero drift is too great.


Remedy:

  • Recalibrate or contact service.
Err38
DC voltage sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the DC voltage sampling value fluctuates greatly.


Remedy:

  • Check DC bus detection circuit.
Err39
Pressure feedback sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the pressure feedback sampling value fluctuates greatly.


Remedy:

  • Check pressure sensor signal stability.
Err40
Pressure feedback sampling zero drift fault
Cause: When the drive is tested in diagnosis mode, the pressure feedback sampling zero drift is too great.


Remedy:

  • Check pressure sensor calibration.
Err41
Pressure reference sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the pressure reference sampling value fluctuates greatly.


Remedy:

  • Check analog input signal.
Err42
Flow reference sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the flow reference sampling value fluctuates greatly.


Remedy:

  • Check analog flow command signal.
Err43
Reserved
Cause: –


Remedy:

  • Reserved.
Err44
Module temperature sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the module temperature sampling value fluctuates greatly.


Remedy:

  • Check internal temp sensor (Service).
Err45
Motor temperature sampling fluctuation fault
Cause: When the drive is tested in diagnosis mode, the motor temperature sampling value fluctuates greatly.


Remedy:

  • Check motor temp sensor connection.
Err46 – Err48
Reserved
Cause: –


Remedy:

  • Reserved.
Err49
Encoder initial angle measuring fault
Cause: During motor parameter autotuning in diagnosis mode, a fault occurs in the encoder initial angle measuring, for example, current does not follow, and timeout occurs.


Remedy:

  • Check encoder installation and wiring.
Err50
Phase sequence detection fault
Cause: During motor parameter autotuning in diagnosis mode, the number of motor pole pairs is calculated incorrectly, the rotation speed limit value is invalid, current does not follow, or timeout occurs.


Remedy:

  • Check UVW phase sequence.

  • Check motor parameter settings.
Err51
Motor resistance test fault
Cause: During motor parameter autotuning in diagnosis mode, current does not follow, timeout occurs, or the resistance test value is invalid.


Remedy:

  • Check motor cabling for breaks.
Err52
Motor parameter dynamic test fault
Cause: During motor parameter autotuning in diagnosis mode, the speed deviation is too great, current does not follow, the load is too great, timeout occurs, or the test value is invalid.


Remedy:

  • Ensure motor is uncoupled from load if required.

  • Check speed loop gains.
Err53
Motor parameter static test fault
Cause: During motor parameter autotuning in diagnosis mode, the motor parameter calculation result is invalid.


Remedy:

  • Check motor nameplate data entry.
Err54
Diagnosis interrupted
Cause: If a fault occurs during diagnosis, the drive terminates the diagnosis and displays “Err54”.


Remedy:

  • Check the original fault code that caused the interruption.
Err55
Reserved
Cause: –


Remedy:

  • Reserved.
Err56
EtherCAT initialization fault
Cause: The EtherCAT chip is in poor contact.


Remedy:

  • Check communication hardware.

  • Contact service.
Err57
EEPROM fault in EtherCAT communication
Cause: The EEPROM does not have data or it fails to read data.


Remedy:

  • Restart drive.

  • Contact service.
Err58
EtherCAT disconnection
Cause: After the drive is enabled, the network cable is not inserted properly, or the EtherCAT master node does not run properly.


Remedy:

  • Check Ethernet cables.

  • Check Master status.
Err59
EtherCAT communication fault
Cause: No PDO data is received after the drive has been enabled for a period of time.


Remedy:

  • Check cycle time configuration.

  • Check network traffic/interference.