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Control power supply wiring is damaged
• 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.
Internal circuitry is damaged
• 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.
Digital Operator Display
Fault Name
Uv3
Undervoltage 3 (Soft-Charge Bypass Relay Fault)
The soft-charge bypass relay failed.
Uv4
Gate Drive Board Undervoltage
Voltage drop in the gate drive board circuit
<1> Detected in models 4A0930 and 4A1200.
voF
Output Voltage Detection Fault
Problem detected with the voltage on the output side of the drive.
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
5.2 Fault Detection
YASKAWA ELECTRIC TOEP YAIP1U 01B YASKAWA AC Drive - P1000 Quick Start Guide
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5
Troubleshooting
Содержание P1000
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