2.4 Fault
56 YASKAWA TOEPYAIGA5001A GA500 DRIVE MAINTENANCE & TROUBLESHOOTING
Code Name Causes Possible Solutions
There is motor hunting. • Adjust n1-02 [Hunting Prevention Gain Setting].
• Adjust n2-02 [Automatic Freq Regulator Time 1] and n2-03
[Automatic Freq Regulator Time 2].
• Adjust n8-45 [Speed Feedback Detection Gain] and n8-47 [Pull-
in Current Comp Filter Time].
Speed search does not complete at start when you set
A1-02 = 8 [EZ Vector Control] and use an induction
motor.
When E9-01 = 0 [Motor Type Selection = Induction (IM)], set b3-
24 = 2 [Speed Search Method Selection = Current Detection Speed
Search].
Note:
• The drive detects this error if the DC bus voltage is more than the ov detection level while the drive is running.
• Do a Fault Reset to clear the fault.
• For 200 V class drives, the detection level of ov is approximately 410 V. For 400 V class drives, the detection level is approximately 820 V.
• L5-08 [Fault Reset Enable Select Grp2] disables the Auto Restart function.
Code Name Causes Possible Solutions
PE1 PLC Faults
The communication option detected a fault. Refer to the manual for the communication option card.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
PE2 PLC Faults
The communication option detected a fault. Refer to the manual for the communication option card.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
PF Input Phase Loss
There is a phase loss in the drive input power. Correct errors with the wiring for main circuit drive input power.
There is loose wiring in the drive input power
terminals.
Tighten the terminal screws to the correct tightening torque.
The drive input power voltage is changing too much. • Examine the input power for problems.
• Make the drive input power stable.
• If the input power supply is good, examine the magnetic
contactor on the main circuit side for problems.
There is unsatisfactory balance between voltage
phases.
• Examine the input power for problems.
• Make the drive input power stable.
• Set L8-05 = 0 [Input Phase Loss Protection Sel = Disabled].
The main circuit capacitors have become
unserviceable.
• Examine the capacitor maintenance time in monitor U4-05
[CapacitorMaintenance]. If U4-05 is more than 90%, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
• If drive input power is correct and the fault stays, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
Note:
• The drive detects this error if the DC bus voltage changes irregularly without regeneration.
• Do a Fault Reset to clear the fault.
• Use L8-05 to enable and disable PF detection.
Code Name Causes Possible Solutions
PGo Encoder (PG) Feedback Loss
The holding brake is stopping the motor. Release the holding brake.
Note:
• Do a Fault Reset to clear the fault.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in F1-02 [PG Open Circuit Detection Select].
Code Name Causes Possible Solutions
rF Braking Resistor Fault
The resistance of the dynamic braking option
connected to the drive is too low.
Use a dynamic braking option that fits the model and duty rating of
the drive.
A regenerative converter or regenerative unit is
connected to the drive.
Set L8-55 = 0 [Internal DB TransistorProtection = Disable].
Note:
Do a Fault Reset to clear the fault.
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