Repair manual

Troubleshooting
Troubleshooting.fm 205
7. Troubleshooting
Problem Possible Causes Measures
Pump fails to start. 1. No power is supplied
(i.e. power outage).
1. Contact electric power
company or an electrical
repair shop.
2. Open circuit or poor
connection of the cable
assembly
2. Check if there is an
open circuit in the cable
assembly or wiring.
3. Impeller is obstructed. 3. Inspect the pump and
remove the obstruction.
Pump starts but stops
immediately, causing the
motor protector to actuate.
1. Impeller is obstructed. 1. Inspect the pump and
remove the obstruction.
2. Voltage drop. 2. Correct the voltage to the
rated voltage, or use an
extension cable that meets
the standard.
3. A 50 Hz model is
operated at 60 Hz.
3. Check the nameplate and
replace the pump or the
impeller.
4. The strainer is obstructed,
and the pump was oper-
ated dry for long periods.
4. Remove the obstruction.
5. Motor abnormal. 5. Repair the motor or
replace with a new motor.
6. The pump is picking up
too much sediment.
6. Place a concrete block
under the pump to prevent
the pump from picking up
sediment.
The pump’s head and
pumping volume is
decreased.
1. The impeller is worn. 1. Replace.
2. The hose may be kinked
or clogged.
2. Minimize the number of
bends in the hose. (In an
area with a large amount
of debris, use the pump in
a meshed enclosure.