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Contact the electric power company or an electrical
repair shop.
Connect the plug.
Check whether there is an open circuit in the
cabtyre cable or wiring.
Remove obstacles and check the operation of the
float.
Use sandpaper to remove the debris.
Repair or replace the level relay unit.
No proper power is supplied
(i.e. power outage).
Plug is not inserted.
Open circuit in cabtyre cable or poor
connection.
Malfunction in float.
Electrode is insulated by debris.
Malfunction in level relay unit.
Inspect the pump and remove the debris.
Remove obstacles and check the operation of the
stop float.
Provide the rated voltage or use an extension
cable that meets the specifications.
Check the nameplate and replace the pump or the
impeller.
Remove the debris from the strainer stand.
Repair or replace.
Place a concrete block under the pump to prevent
the pump from drawing in excess mud.
Foreign matter is wedged in the impeller,
causing the motor protector to trip.
The movement of the stop float is
obstructed, causing the start float alone to
perform the start and stop operations.
The voltage is too low.
A 50Hz unit is used at 60Hz.
The pump has been operated for a long
time with its strainer stand clogged.
Malfunction of motor (seizure or water
leakage).
The pump is drawing in too much mud.
Replace the bearings.
Motor bearings are damaged.
Remove the blockage. Or, replace the part.
Set the water level of the (stop) float higher than the
pump's minimum possible operating water level.
Repair or replace the level relay unit.
Use sandpaper to remove the debris.
Check whether there are any wires that are tangled
around the electrode. Check whether there are any
electrical devices that could generate
electro-magnetic interference, and relocate the unit
as necessary.
The movement of the floats is obstructed.
The switch in a float is faulty.
The water level of the (stop) float is set
lower than the pump's minimum possible
operating water level.
Malfunction in level relay unit
Electrode is shorted by debris.
Influence by electrical device in the vicinity
of the pump.
Replace the impeller.
Minimize the bends of the hose, and if the pump is
used in a dusty area, place it inside a mesh basket
during operation.
Remove the debris from the strainer stand.Place a
concrete block under the pump to prevent the
pump from drawing in excess mud.
Change the power connection.
Check the nameplate and replace the pump or the
impeller.
The impeller is worn.
The hose is clogged or kinked at its
midspan.
The strainer stand is clogged or is buried.
The motor rotates in reverse.
A 60Hz pump is used at 50Hz.
Pump fails to start; or, starts
but stops immediately.
Pump generates vibration or noise.
The pump does not stop
automatically.
Problem
Possible cause
Countermeasure
Pump starts but stops
immediately, causing the
motor protector to trip.
The pumping volume is low.
Remarks
Purchase date
Manufacturing number
Product model
