INVT BPD Series Drive

INVT BPD Series Drive Fault Codes:

Fault Code and MeaningCause and Remedy
OV1
Overvoltage when acceleration
Cause:


1. The input voltage is abnormal.

2. There is large energy feedback.

3. No brake components.

4. Braking energy is not open.

5. The overvoltage stall protection is not open.



Remedy:

  • Check the input power.

  • Check if the DEC time of the load is too short.

  • Check if the inverter starts during the rotation of the motor.

  • Install the brake components if necessary.

  • Check the setting of related function codes.
OV2
Overvoltage when deceleration
Cause:


1. The input voltage is abnormal.

2. Large energy feedback during deceleration.

3. No brake components.

4. The overvoltage stall protection is not open.



Remedy:

  • Check the input power.

  • Check if the DEC time is too short.

  • Install the brake components.

  • Check the setting of related function codes.
OV3
Overvoltage when constant speed running
Cause:


1. The input voltage is abnormal.

2. Large energy feedback.

3. The overvoltage stall protection is not open.



Remedy:

  • Check the input power.

  • Install brake components if needed.

  • Check the setting of related function codes.
OC1
Overcurrent when acceleration
Cause:


1. The acceleration is too fast.

2. The voltage of the grid is too low.

3. The power of the inverter is too low.

4. The load transients or is abnormal.

5. The grounding is short circuited or output phase loss.

6. Strong external interference.



Remedy:

  • Increase the ACC time.

  • Check the input power.

  • Select the inverter with a larger power.

  • Check if the load is short circuited (grounding or wire) or rotation is not smooth.

  • Check the output configuration.

  • Check if there is strong interference.
OC2
Overcurrent when deceleration
Cause:


1. The deceleration is too fast.

2. The voltage of the grid is too low.

3. The power of the inverter is too low.

4. The load transients or is abnormal.

5. Grounding short circuit or output phase loss.

6. Strong external interference.



Remedy:

  • Increase the DEC time.

  • Check the input power.

  • Select the inverter with a larger power.

  • Check load for short circuits or blockage.

  • Check output configuration.
OC3
Overcurrent when constant speed running
Cause:


1. The voltage of the grid is too low.

2. The power of the inverter is too low.

3. The load transients or is abnormal.

4. Grounding short circuit or output phase loss.

5. Strong external interference.



Remedy:

  • Check the input power.

  • Select the inverter with a larger power.

  • Check if the load is short circuited or rotation is not smooth.

  • Check the output configuration.

  • Check for strong interference.
UV
Bus undervoltage
Cause:


1. The voltage of the power supply is too low.

2. The overvoltage stall protection is not open.



Remedy:

  • Check the input power of the supply line.

  • Check the setting of related function codes.
OL1
Motor overload
Cause:


1. The voltage of the power supply is too low.

2. The motor setting rated current is incorrect.

3. The motor stall or load transients is too strong.



Remedy:

  • Check the power of the supply line.

  • Reset the rated current of the motor.

  • Check the load and adjust the torque lift.
OL2
Inverter overload
Cause:


1. The acceleration is too fast.

2. The rotating motor is reset.

3. The voltage of the power supply is too low.

4. The load is too heavy.

5. The motor power is too small.



Remedy:

  • Increase the ACC time.

  • Avoid restarting after stopping.

  • Check the power of the supply line.

  • Select an inverter with bigger power.

  • Select a proper motor.
SPI
Input phase loss
Cause:


Phase loss or fluctuation of input R,S,T.



Remedy:

  • Check input power.

  • Check installation distribution.
SPO
Output phase loss
Cause:


U,V,W phase loss output (or serious asymmetrical three phase of the load).



Remedy:

  • Check the output distribution.

  • Check the motor and cable.
OH1
Rectifier module overheat
Cause:


1. Air duct jam or fan damage.

2. Ambient temperature is too high.

3. The time of overload running is too long.



Remedy:

  • Dredge the wind channel or change the fan.

  • Decrease the environment temperature.
OH2
Inverter module overheat
Cause:


1. Air duct jam or fan damage.

2. Ambient temperature is too high.

3. The time of overload running is too long.



Remedy:

  • Dredge the wind channel or change the fan.

  • Decrease the environment temperature.
EF
External fault
Cause:


SI external fault caused by actions of input terminals.



Remedy:

  • Check the external device input.
CE
485 Communication error
Cause:


1. The baud rate setting is incorrect.

2. Fault occurs to the communication wiring.

3. The communication address is wrong.

4. There is strong interference to the communication.



Remedy:

  • Set proper baud rate.

  • Check the communication connection distribution.

  • Set proper communication address.

  • Change or replace the connection distribution or improve the anti-interference capability.
ItE
Current detection fault
Cause:


1. The control panel connector is in poor contact.

2. The Hall component is damaged.

3. The magnifying circuit is abnormal.



Remedy:

  • Check the connector and rewire.

  • Replace the Hall component.

  • Replace the main control panel.
EEP
EEPROM fault
Cause:


1. Error occurs in writing or reading control parameters.

2. EEPROM is damaged.



Remedy:

  • Press STOP/RST to reset.

  • Replace the main control panel.
PIDE
PID feedback fault
Cause:


1. PID feedback is offline.

2. The PID feedback source disappears.



Remedy:

  • Check the PID feedback signal line.

  • Check the PID feedback source.
END
Running time reached
Cause:


The actual running time of the inverter is longer than the preset running time.



Remedy:

  • Ask the supplier to adjust the preset running time.
OL3
Electrical overload
Cause:


The inverter will report overload pre-alarm according to the set value.



Remedy:

  • Check the load and the overload pre-alarm points.
dEu
Velocity deviation fault
Cause:


The load is too heavy or stalled.



Remedy:

  • Check the load and ensure it is normal. Increase the detection time.

  • Check whether the control parameters are normal.
STo
Maladjustment fault
Cause:


1. The control parameters of the synchronous motors not set properly.

2. The autotuning parameter is not correct.

3. The inverter is not connected to the motor.



Remedy:

  • Check the load and ensure it is normal.

  • Check whether the control parameter is set properly or not.

  • Increase the maladjustment detection time.
LL
Electronic underload fault
Cause:


The inverter will report the underload pre-alarm according to the set value.



Remedy:

  • Check the load and the underload pre-alarm points.
tSF
Hydraulic probe damage
Cause:


The hydraulic probe is damaged.



Remedy:

  • Replace the hydraulic probe.
PINV
PV reverse connection fault
Cause:


The solar wiring is not properly performed.



Remedy:

  • Identify the positive and negative solar terminals, and rewire.
PVOC
PV overcurrent
Cause:


1. The ACC/DEC is too fast.

2. The inverter power is too low.

3. The load suddenly changes or is abnormal.

4. The grounding is short circuited.



Remedy:

  • Increase the ACC/DEC time.

  • Use an inverter with greater power.

  • Check whether the grounding or cable connection is short circuited or whether the rotation is blocked.
PVOV
PV overvoltage
Cause:


The solar panel input voltage is too high or the model is 380V but set to 220V.



Remedy:

  • Reduce the serially connected solar panels.

  • Check and reset the model.
PVLV
PV undervoltage
Cause:


1. The power of the serially connected solar panels is too low, or it is rainy and cloudy.

2. The starting current of the motor is too high.



Remedy:

  • Increase solar panels or test it again under normal sunlight.

  • Replace the motor.
A-LS
Weak light alarm
Cause:


The sunlight is weak or too few solar panels are configured.



Remedy:

  • The device automatically operates after the sunlight gets stronger, and no processing is needed.

  • Check whether solar panels are properly configured.
A-LL
Underload alarm
Cause:


The water pumping tank is empty.



Remedy:

  • Check the water pumping tank.
A-tF
Water full alarm
Cause:


The water storing tank is full.



Remedy:

  • If enabled, device automatically stops. No processing needed.

  • If not enabled but alarm occurs, check for disconnected terminals.
A-tL
Water empty alarm
Cause:


The water pumping tank is empty.



Remedy:

  • If enabled, device automatically stops. No processing needed.

  • If not enabled but alarm occurs, check for disconnected terminals.