YASKAWA GA700 Technical Manual page 360

6.4 Faults
Code Name
Note:
• The drive detects this error if the DC bus voltage decreases below the level set in L2-05 [Undervoltage 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 [Fault Reset Enable Select Grp2] 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 this fault.
360
Causes
The relay or contactor on the soft-charge
bypass relay is damaged.
Causes
The value set in L2-02 [Power Loss
Ride Through Time] 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.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Possible Solutions
U4-06 [PreChargeRelayMainte] 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.
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 Yaskawa 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 [PreChargeRelayMainte]
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.