Fault GF - Ground fault
Cause Overheating caused damage to the motor or the motor insulation is not
satisfactory.
Remedy Measure the motor insulation resistance and replace the motor if there is
electrical conduction or unserviceable insulation.
Cause The motor main circuit cable is contacting ground to make a short circuit.
Remedy Examine the motor main circuit cable for damage and repair short circuits.
Measure the resistance between the motor main circuit cable and the ground
terminal. If there is electrical conduction, replace the cable.
Cause There is a problem with the drive hardware.
Remedy Contact us.
Fault LF - Output phase loss
Cause The motor main circuit cable is disconnected.
Remedy Connect motor main circuit cable wiring. Correct wiring errors in the main circuit
drive input power.
Cause The screws on the drive output terminals are loose.
Remedy T
ighten the terminal screws to the correct tightening torque.
Cause The output transistor in the drive is damaged.
Remedy Contact us.
Fault LF2 - Output current imbalance
Cause Phase loss occurred in the wiring on the output side of the drive.
Remedy Examine for wiring errors or disconnected wires on the output side of the drive
and repair problems.
Cause The output terminal screws of the drive are loose.
Remedy Tighten the terminal screws to the correct tightening torque.
Cause The drive output circuit is broken.
Remedy Re-energise the drive. Contact us.
Fault PF - Input phase loss
Cause There is a phase loss in the drive input power.
Remedy Correct errors with the wiring for main circuit drive input power.
Cause There is loose wiring in the drive input power terminals.
Remedy Tighten the terminal screws to the correct tightening torque.
07/2021 - ©Atlas CopcoPage 1251950840208_A
Fault finding
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