Omron Q2V Series Technical Manual page 237

Code Name
Note:
• The drive detects this error if the DC bus voltage decreases below the level set in L2-05 [UV Detection Lvl (Uv1)] while the drive is running.
• The Uv1 detection level is approximately 190 V for a 200 V class drives. The detection level is approximately 380 V for 400 V class drives. The detection level is
approximately 350 V when E1-01 [Input AC Supply Voltage] < 400.
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
• L5-08 [U/OV,OH,GF A-Reset Select] disables the Auto Restart function.
Code Name
Uv2 Control Power Undervoltage
Note:
• The drive detects this error if the control power supply voltage decreases.
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
Code Name
Uv3 Soft Charge Answerback Fault
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
SIEPCYEUOQ2V01A Q2V Technical Manual
Causes
The relay or contactor on the soft-charge bypass
relay is damaged.
Causes
The value set in L2-02 [RideThrough Time@Power
Loss] increased and the momentary power loss
recovery unit is not connected to the drive.
There was a problem with the drive hardware.
Causes
The relay or contactor on the soft-charge bypass
relay is damaged.
Possible Solutions
U4-06 [SoftChgRelay Maint] 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 the manufacturer or your nearest sales representative.
Possible Solutions
Connect the momentary power loss recovery unit to the drive.
• Re-energize the drive.
• If the fault stays, replace the control board or the drive. For
information about replacing the control board, contact the
manufacturer or your nearest sales representative.
Possible Solutions
• Re-energize the drive.
• If the fault stays, replace the control board or the drive.
• Check monitor U4-06 [SoftChgRelay Maint] 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 control board, contact the manufacturer or
your nearest sales representative.
7.4 Faults
7
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