Yaskawa A1000, U1000, V1000 & V1000-4X Drive
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Mar 22, 2024 11:57 am
Cause : Undervoltage 3 (Soft-Charge Bypass Relay Fault) comes when the soft-charge bypass relay failed or the relay or contactor on the soft-charge bypass relay is damaged.
• Cycle power to the drive and see if the fault reoccurs.
• Check monitor U4-06 for the performance life of the soft-charge bypass relay.
• Replace either the control board or the entire drive if U4-06 exceeds 90%.
