YASKAWA HV600

Troubleshooting
6
6.5 Faults
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference 495
Code Name Causes Possible Solutions
Uv3 Soft Charge Answerback Fault
The relay or contactor on the soft-charge bypass relay
is damaged.
• Re-energize the drive.
• If the fault stays, replace the control board or the drive.
• Check monitor U4-06 [PreChargeRelayMainte], which shows
the performance life of the soft-charge bypass relay. If U4-06 is
more than 90%, replace the board or the drive. For information
about replacing the board, contact Yaskawa or your nearest sales
representative.
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
Code Name Causes Possible Solutions
VLTS Thermostat Fault
The digital input from the terminal set for Thermostat
Fault [H1-xx = 88] is active.
Examine the wiring or wait for the motor to cool.
Note:
• Do a Fault Reset to clear the fault.
• Parameter L5-53 [Thermostat Fault Retry Selection] sets the Auto Restart function of this fault.