Yaskawa UV1 fault code meaning

Yaskawa / UV1

Series: 616G5

Main circuit undervoltage

drive

Meaning:

Possible causes

Source: Yaskawa VS-616G5 Instruction Manual, Protection and Diagnostic Functions P274

Series: L7

Main circuit undervoltage

drive

Meaning: The main circuit DC voltage is below the value set in L2-05 (undervoltage (UV) detection threshold). 200V class: approximately 190V400V; 380V class: approximately MC. Faulty main circuit operation: no response from MC during drive operation; the power supply voltage fluctuation is too large; a momentary power failure has occurred; the input power supply terminal screws are loose; input power supply phase loss has occurred; the acceleration time setting is too short; the surge current suppression circuit operates incorrectly during drive operation

Possible causes

Source: Yaskawa L7 Series Elevator Drive User Manual, Fault Diagnosis P261