Yaskawa J1000 Compact Vector Control Drive - Manual (Page 152)

Digital Operator Display Fault Name
Problem with the CHARGE
indicator.
Replace the drive.
Digital Operator Display Fault Name
Uv2
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
Cause Possible Solution
L2-02 changed from its default
value in drive that is 7.5 kW or
smaller without installing a
Momentary Power Loss Ride-
Thru.
Correct parameter L2-02 setting or install optional Momentary Power Loss Ride-
Thru unit.
The wiring for the control power
supply is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• Replace the drive if the fault continues to occur.
Internal circuitry is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• Replace the drive if the fault continues to occur.
Digital Operator Display Fault Name
Uv3
Undervoltage 3 (Inrush Prevention Circuit Fault)
The inrush prevention circuit has failed.
Cause Possible Solution
The contactor on the inrush
prevention circuit is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• Replace the drive if the fault continues to occur.
• Check monitor U4-06 for the performance life of the inrush prevention circuit.
• Replace the drive if U4-06 exceeds 90%.
5.2 Fault Detection
152 YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide