INVT SPC Series Drive

INVT SPC Series Drive Fault Codes:

Fault Code and MeaningCause and Remedy
OV1
Overvoltage during ACC
Cause:
The input voltage is abnormal; There is large energy feedback; No braking components; Energy-consumption braking is not enabled.



Remedy:

  • Check the input power.

  • Check whether the loaded DEC time is too short or the inverter starts when the motor is rotating.

  • Install the braking components.

  • Check the setting of related function codes.
OV2
Overvoltage during DEC
Cause:
The input voltage is abnormal; There is large energy feedback; No braking components; Energy-consumption braking is not enabled.



Remedy:

  • Check the input power.

  • Check whether the loaded DEC time is too short or the inverter starts when the motor is rotating.

  • Install the braking components.

  • Check the setting of related function codes.
OV3
Overvoltage during constant speed running
Cause:
The input voltage is abnormal; There is large energy feedback; No braking components; Energy-consumption braking is not enabled.



Remedy:

  • Check the input power.

  • Check whether the loaded DEC time is too short or the inverter starts when the motor is rotating.

  • Install the braking components.

  • Check the setting of related function codes.
OC1
Overcurrent during ACC
Cause:
The acceleration or deceleration is too fast; The voltage of the grid is too low; The power of the inverter is too low; The load transients or is abnormal; There is to-ground short circuit or output phase loss; There is strong external interference; The overvoltage stall protection is not enabled.



Remedy:

  • Increase the ACC time.

  • Check the input power.

  • Select the inverter with larger power.

  • Check whether there is short circuit (to-ground or inter-wire) in the load or the rotation is not smooth.

  • Check the output wiring.

  • Check whether there is strong interference.

  • Check the setting of related function codes.
OC2
Overcurrent during DEC
Cause:
The acceleration or deceleration is too fast; The voltage of the grid is too low; The power of the inverter is too low; The load transients or is abnormal; There is to-ground short circuit or output phase loss; There is strong external interference; The overvoltage stall protection is not enabled.



Remedy:

  • Increase the ACC time.

  • Check the input power.

  • Select the inverter with larger power.

  • Check whether there is short circuit (to-ground or inter-wire) in the load or the rotation is not smooth.

  • Check the output wiring.

  • Check whether there is strong interference.

  • Check the setting of related function codes.
OC3
Overcurrent during constant speed running
Cause:
The acceleration or deceleration is too fast; The voltage of the grid is too low; The power of the inverter is too low; The load transients or is abnormal; There is to-ground short circuit or output phase loss; There is strong external interference; The overvoltage stall protection is not enabled.



Remedy:

  • Increase the ACC time.

  • Check the input power.

  • Select the inverter with larger power.

  • Check whether there is short circuit (to-ground or inter-wire) in the load or the rotation is not smooth.

  • Check the output wiring.

  • Check whether there is strong interference.

  • Check the setting of related function codes.
UV
Bus undervoltage fault
Cause:
The voltage of the grid is too low; The overvoltage stall protection is not enabled.



Remedy:

  • Check the grid input power supply.

  • Check the setting of related function codes.
OL1
Motor overload
Cause:
The grid voltage is too low; The motor rated current is set incorrectly; The motor stall occurs or the load transient is too large.



Remedy:

  • Check the grid voltage.

  • Reset the motor rated current.

  • Check the load and adjust the torque boost quantity.
OL2
Inverter overload
Cause:
The ACC is too fast; The rotating motor is reset; The grid voltage is too low; The load is too heavy; The motor power is too small.



Remedy:

  • Increase the ACC time.

  • Avoid the restarting after stop.

  • Check the grid voltage.

  • Select an inverter with larger power.

  • Select a proper motor.
SPO
Phase loss on output side
Cause:
Phase loss output occurs to U, V, W (or the three phases of the load are seriously asymmetrical).



Remedy:

  • Check the output wiring.

  • Check the motor and cables.
OH2
Inverter module overheat
Cause:
Air duct jam or fan damage occurs; Ambient temperature is too high; The time of overload running is too long.



Remedy:

  • Dredge the vent duct or replace the fan.

  • Lower the ambient temperature.
EF
External fault
Cause:
SI external faulty input terminal action.



Remedy:

  • Check external device input.
CE
RS485 communication fault
Cause:
The baud rate setting is incorrect; A fault occurs to the communication wiring; The communication address is incorrect; There is strong interference to the communication.



Remedy:

  • Set a proper baud rate.

  • Check the communication interface wiring.

  • Set a proper communication address.

  • Change or replace the wire or improve the anti-interference capability.
ItE
Current detection fault
Cause:
The control board connector is in poor contact; Hall device is damaged; An exception occurs on the magnifying circuit.



Remedy:

  • Check the connector and re-plug.

  • Replace the Hall device.

  • Change the main control board.
tE
Motor autotuning fault
Cause:
The motor capacity does not match the inverter capacity; Motor parameters are not set correctly; The difference between the parameters obtained from autotuning and the standard ones is great; Autotuning timed out.



Remedy:

  • Change the inverter model.

  • Set the motor type and nameplate parameters correctly.

  • Empty the motor load.

  • Check the motor wiring and parameter settings.

  • Check whether the upper limit frequency is higher than 2/3 of the rated frequency.
EEP
EEPROM operation error
Cause:
Error in reading or writing control parameters; The EEPROM is damaged.



Remedy:

  • Press STOP/RST for reset.

  • Change the main control board.
END
Running time reached
Cause:
The actual running time of the inverter is longer than the internal set running time.



Remedy:

  • Ask for the supplier and adjust the set running time.
OL3
Electronic overload fault
Cause:
The inverter reports overload pre-alarm according to the setting.



Remedy:

  • Check the load and the overload pre-alarm points.
ETH1
To-ground short-circuit fault 1
Cause:
The output of the inverter is short circuited to the ground; There is a fault in the current detection circuit.



Remedy:

  • Check whether the motor wiring is normal.

  • Replace the Hall device.

  • Change the main control board.
ETH2
To-ground short-circuit fault 2
Cause:
The output of the inverter is short circuited to the ground; There is a fault in the current detection circuit.



Remedy:

  • Check whether the motor wiring is normal.

  • Replace the Hall device.

  • Change the main control board.
dEu
Speed deviation fault
Cause:
The load is too heavy or stalled.



Remedy:

  • Check the load and increase the detection time if the load is normal.

  • Check whether control parameters are set correctly.
STo
Mal-adjustment fault
Cause:
SM control parameters are set incorrectly; Autotuned parameters are not accurate; The inverter is not connected to the motor.



Remedy:

  • Check the load and ensure the load is normal.

  • Check whether control parameters are set correctly.

  • Increase the mal-adjustment detection time.
LL
Electronic underload fault
Cause:
The inverter reports underload pre-alarm according to the setting.



Remedy:

  • Check the load and the underload pre-alarm points.
A-LS
Weak-light pre-alarm
Cause:
The sunlight is weak or the PV module configuration is insufficient.



Remedy:

  • The device will automatically run when the light is sufficient.

  • Check whether the PV module configuration is sufficient.
A-LL
Underload pre-alarm
Cause:
The pumping pool has no water.



Remedy:

  • Check the pumping pool.
A-tF
Full-water pre-alarm
Cause:
The pumping pool is full.



Remedy:

  • If you have configured the full-water pre-alarm function, the device automatically stops when the pre-alarm elapsed a period of time.

  • Otherwise, check whether terminals are wired correctly.
A-tL
Empty-water pre-alarm
Cause:
The pumping pool has no water.



Remedy:

  • If you have configured the empty-water pre-alarm function, the device automatically stops when the pre-alarm elapsed a period of time.

  • Otherwise, check whether terminals are wired correctly.