Yaskawa Varispeed-656 DC5 Converter - Manual (Page 19)

VS-656DC5 User’s Manual
17 - 20
UV1 Main Circuit
Undervoltage While running, the main circuit voltage fell
beneath the PUV detection level and
exceeded the momentary power loss ride-
through time.
Detection level
400V Class: Approx. 380V DC or less
600V Class: Approx. 570V DC or less • Check the wiring on power
side devices
• Fix the source voltage
UV2 Control Circuit
Undervoltage An undervoltage has occurred in the control
circuit
UV3 MC Answer
Fault The in rush current suppressing contactor
opened during operation.
AUv Supply Under-
voltage While running, an undervoltage occurred on
the power supply side.
Detection level
400V Class: Approx 300V AC or less
600V: Approx. 400V AC or less
FdEv Power Fre-
quency Error The power frequency has exceeded the toler-
ance (F1-10)
SrC Input Phasing
Error The phase cycle direction on the input side
changed after control power input.
OC Overcurrent The Converter input current exceeded the OC
level. • Output short
• Decrease power
OV Overvoltage The main circuit DC voltage exceeded the
OV level
Detection level
400V Class: Approx 800V DC or higher
600V: Approx 1040V DC or higher Excessive regen load
OH Cooling Fin
Overheat The cooling fin temperature has exceeded the
value in L8-02. • Check fin, ambient temper-
ature
• Check the filter, fin
OH1 Cooling Fin
Overheat The cooling fin temperature has exceeded the
tolerance.
OL Converter Input
Overload The input overload level has been exceeded. Decrease load
Error Displays and Countermeasures (Continued)
Error
Display
Error Display
Content
Description Countermeasures