YASKAWA P1000

Digital Operator Display Fault Name
<1>
Uv4
Gate Drive Board Undervoltage
Voltage drop in the gate drive board circuit
Cause Possible Solution
Not enough power is being supplied to the gate
drive board.
• Cycle power to the drive and see if the fault reoccurs. Refer to Diagnosing and Resetting Faults on
page 327 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.
<1> Detected in models 4A0930 and 4A1200.
Digital Operator Display Fault Name
voF
Output Voltage Detection Fault
Problem detected with the voltage on the output side of the drive.
Cause Possible Solution
Hardware is damaged. Internal drive module
MC / FAN overheat protection circuit board is
due to abnormal ambient operating power.
• Lower ambient temperature.
• Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
Digital Operator Display Fault Name
vToL VT Overload
Cause Possible Solution
The output current of the drive has been
elevated for a set length of time.
The application may not be suited for the drive
• The application may not be suited for the drive
• The drive is undersized for the load
6.4 Fault Detection
310
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual