Yaskawa iQpump Controller User Manual - Manual (Page 142)

6.1 Fault Detection
142 YASKAWA TM.iQp.06 iQpump Controller User Manual
Uv2
CTL PS Undervolt
Control Power Supply Undervoltage
Undervoltage of the control circuit when running.
External load connected pulling
down the iQpump power supplies.
Cycle power off and on to the iQpump.
Repair or replace the Power PCB / Gate
iQpump PCB.
Remove all control wiring and test
iQpump.
Uv3
MC Answerback
Soft Charge Circuit Fault
The pre-charge contactor opened while the
iQpump was running.
Contacts on the soft charge
contactor are dirty and the soft
charge contactor does not function
mechanically.
Cycle power off and on to the iQpump.
Check the condition of the soft charge
contactor.
Repair or replace the Power PCB / Gate
iQpump PCB.
WARNING
Some features within the PI function group cause the iQpump to shut down momentarily (e.g. Sleep Function, Snooze
Function, Feedback Loss feature etc.) Upon recovery from the conditions that activate these features, the iQpump may
start unexpectedly. Therefore, when enabling these features take appropriate measures to notify personnel working with
this equipment that unexpected starting may occur.
Digital
Operator Display
Description Cause Corrective Action