Yaskawa J1000 Compact V/f Control Drive - Manual (Page 140)

Digital Operator Display Fault Name
There is a problem with the voltage
from the drive input power.
• Check the voltage.
• Correct the voltage to within range listed in drive input power specifications.
The power has been interrupted. Correct the drive input power.
Drive internal circuitry has become
worn.
• Check the maintenance time for the capacitors (U4-05).
• Replace the drive if U4-05 exceeds 90%.
The drive input power transformer
is not large enough and voltage
drops after switching on power.
Check the capacity of the drive input power transformer.
Air inside the drive is too hot. Check the drive internal temperature.
Problem with the CHARGE
indicator.
Replace the drive.
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%.
5.4 Fault Detection
140 YASKAWA ELECTRIC TOEP C710606 26D YASKAWA AC Drive – J1000 Quick Start Guide