YASKAWA A1000 HHP Programming Manual page 201

The relay or contactor on the soft-charge
bypass circuit is damaged
Digital Operator Display
Cause
In drive models 2A0004 to 2A0056 or 4A0002
to 4A0031, L2-02 was changed from its
default value without installing a Momentary
Power Loss Ride-Thru unit
Control power supply wiring is damaged
Internal circuitry is damaged
Digital Operator Display
Cause
The relay or contactor on the soft-charge
bypass relay is damaged
Digital Operator Display
<1>
Cause
Not enough power is being supplied to the gate
drive board.
<1> Detected in models 4A0930 and 4A1200.
Digital Operator Display
Cause
Internal drive module MC / FAN power
supply is low.
Digital Operator Display
Cause
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
• Cycle power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
• Check monitor U4-06 for the performance life of the soft-charge bypass.
• Replace either the control board or the entire drive if U4-06 exceeds 90%. For instructions on replacing
the control board, contact Yaskawa or a Yaskawa representative.
Control Power Supply Voltage Fault
Uv2
Voltage is too low for the control drive input power.
Correct the setting to L2-02 or install an optional Momentary Power Loss Ride-Thru unit.
• Cycle power to the drive. Check if the fault reoccurs.
• If the problem continues, replace the control board, the entire drive, or the control power supply. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
• Cycle power to the drive. Check if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
Undervoltage 3 (Soft-Charge Bypass Relay Fault)
Uv3
The soft-charge bypass relay failed.
• Cycle power to the drive and see if the fault reoccurs.
• Check monitor U4-06 for the performance life of the soft-charge bypass relay.
• Replace either the control board or the entire drive if U4-06 exceeds 90%. For instructions on replacing
the control board, contact Yaskawa or a Yaskawa representative.
Gate Drive Board Undervoltage
Uv4
Voltage drop in the gate drive board circuit
• Cycle power to the drive and see if the fault reoccurs.
page 224 for details.
• If the problem continues, replace either the gate drive board or the entire drive. For instructions on
replacing the gate drive board, contact Yaskawa or a Yaskawa representative.
MC/FAN power malfunction
Uv5
Internal drive module MC / FAN power supply does not function properly.
• Power the drive ON/OFF to verify operation.
• Refer to the manual section on how to restart the drive after an error.
• If the error occurs again replace the defective module or defective circuit board..
Output Voltage Detection Fault
voF
Problem detected with the voltage on the output side of the drive.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Refer to Diagnosing and Resetting Faults on
Fault Name
Possible Solution
Fault Name
Possible Solution
2.4 Fault Detection
2
201