20
21
TROUBLE SHOOTING
FAULT MESSAGE
POSSIBLE CAUSE
SOLUTIONS
Flashing of "UNDER V"
Actual voltage is lower than
the calibrated voltage,
pump is in under voltage
protection state
Check the power supply
at source
Flashing of "OVER V"
Actual voltage is higher
than the calibrated voltage,
pump is in over voltage
protection state
Check the power supply
at source
Control unit will attempt
to restart the pump every
5 minutes until line
voltage is restored to
normal
Flashing of "OVER LOAD"
Actual drawn current is
higher than the calibrated
current, pump is in over load
protection state
Control unit will attempt
to restart the pump every
30 minutes until running
current is restored to
normal
Pump impeller is jammed/
pump motor dragging/
pump bearing broken
Check pump impeller
or bearing
Flashing of "NO CALIBER"
Parameter calibration not
completed
Carry out parameter
calibration
Flashing of "DRY RUN"
Liquid level in the well/
sump is below the pump
inlet, pump is in DRY RUN
prevention state
Control unit will attempt
to restart the pump every
30 minutes (or set time)
until liquid level reaches
above the pump inlet
Flashing of "STALLED"
Current drawn exceeds
200%
Cut off power supply &
repair or replace pump
