6.3 Fault Detection
298 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Digital Operator Display Fault Name
Uv3
Soft-Charge Bypass Circuit Fault
The soft-charge bypass circuit failed.
Cause Possible Solution
The relay or contactor on the soft-charge bypass circuit
is damaged.
• 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.
Digital Operator Display Fault Name
voF
Output Voltage Detection Error
Problem detected with the voltage on the output side of the drive.
Cause Possible Solution
Hardware is damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa or a Yaskawa
representative.
<1> Displayed as or when occurring at drive power up. When one of the faults occurs after successfully starting the drive, the display
will show or .
<2> Displayed only for models in compliance with IEC/EN 61508 SIL3 Safety Integrity Level 3.
SIEP_C710616_38F_5_0.book 298 ページ ２０１５年１１月９日 月曜日 午後３時３６分
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