Walrus HS Series, Instruction Manual, Page: 6 / 8

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VIII. Troubleshooting
IX. Maintenance and service
Under normal operating conditions, the pump is maintenance free. It is especially critical, when
the ambient temperature reaches 40°C (104°F), to keep your pump site dry and maintain good
ventilation. It is always advisable to provide accessible space around the pump.
You may refer to troubleshooting check list to find out a quick solution for your problems.
However if the problems are still existed after your attempts or you need other services, please
contact your pump supplier. Do not attempt to disassemble the pump as it will void your
warranty.
Before starting work on the pump, make sure that the electricity supply has been
switched off and that it cannot be accidentally switched on.
Problem
1. pump does not
start
2. Pump cuts out
during operation
3. Electric shock
4. Pump runs
normal but with
very low
discharge flow
Cause
a. No power supply
b. Too low/high voltage
c. Seized-up pump
a. Seized-up pump
b. Overloaded motor
c. Poor water supply
d. Overheating due to
excessive water
temperature
Ineffective grounding
Poor water supply
Remedy
Connect the electricity supply
Check if supply voltage is within ± 10%
Place a screwdriver against the shaft end of
the motor to check it the rotor will spin
freely, and contact your pump supplier.
Same as above
Turn off the power supply and restart or
contact your pump supplier.
Check if pump suction inlet is blocked.
1. Wait till water temp. cool down before
restarting the pump.
2. For rapid restart, fill cold water to the
chamber to quickly cool down the liquid
temp.
Reactivate grounding.
check if water supply is adequate and if the
suction pipe is blocked.