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.
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