Chapter 6 - Troubleshooting & Maintenance

6.3 Fault Remedy

Protective

Cause

Remedy

Function

 

 

 

1) Acceleration/Deceleration time is too short compared to

1) Increase Accel/Decel time.

 

the GD²of the load.

2) Increase inverter capacity.

 

2) Load is larger than the inverter rating.

3) Operate after motor has stopped.

Over Current

3) Inverter turns output on while motor is free running.

4) Check output wiring.

Protection

4) Output short or ground fault has occurred.

5) Check mechanical brake operation.

 

5) Mechanical brake of the motor is operating too fast.

6) Check cooling fan.

 

6) Components of the main circuit have overheated due to

(Caution) Operating prior to correcting fault may

 

a faulty cooling fan.

damage the IGBT.

 

1) Deceleration time is too short compared to the GD²of the

1) Increase deceleration time.

Over Voltage

load.

2) Use regenerative resistor option.

Protection

2) Regenerative load on inverter output.

3) Check line voltage.

 

3) Line voltage is too high.

 

Current Limit

1) Load is larger than inverter rating.

1) Increase capacity of motor and inverter.

Protection

2) User selected incorrect inverter capacity.

2) Select a correct inverter capacity.

(Overload

3) User set incorrect V/F pattern.

3) Select correct V/F pattern.

Protection)

 

 

 

1) Cooling fan is damaged or an alien substance is

1) Exchange cooling fans and/or eliminate alien

Heat Sink

inserted.

substance.

Overheat

2) Cooling system has faulted.

2) Check for any alien substances in heat sink.

 

3) Ambient temperature too high.

3) Keep ambient temperature under 40 °C (104 °F).

 

1) Motor has overheated.

1) Reduce load and/or running duty.

 

2) Load is larger than inverter rating.

2) Increase inverter capacity.

Electronic

3) ETH level too low.

3) Adjust ETH level to an appropriate level.

Thermal

4) User selected incorrect inverter capacity.

4) Select a correct inverter capacity.

 

5) User set incorrect V/F pattern.

5) Select a correct V/F pattern.

 

6) Operating too long at low speeds.

6) Install a cooling fan with a separate blower.

 

1) Line voltage too low.

1) Check line voltage.

 

2) Load larger than line capacity connected to input.

2) Increase line capacity.

Low Voltage

(Welding machine, motor with high starting current

3) Exchange magnetic switch.

Protection

connected to the commercial line)

 

 

3) Damaged or faulty magnetic switch at input side of

 

 

inverter.

 

Output Phase

1) Faulty contact on the magnetic switch at the output.

1) Check magnetic switch on output.

Open

2) Faulty output wiring

2) Check output wiring.

 

1) Fan Fault

1) Check cooling fan.

 

2) CPU Error

2) Exchange inverter.

H/W Fault

3) EEPROM Error

3) Exchange inverter.

 

4) Ground Fault

4) Check inverter, motor, and wiring insulation.

 

5) NTC Damage

5) Check NTC.

LOV (V1)

Frequency Reference is Lost

Eliminate cause of fault.

LOI (I)

 

 

Inverter

1) Load is larger than inverter rating.

1) Increase motor and/or inverter capacity.

Overload

2) User selected incorrect inverter capacity.

2) Select correct inverter capacity.

93

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Cleveland Range inverter manual Fault Remedy, Protective Cause Remedy
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inverter specifications

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