Wilo PBI-L203MA, Installation, Operation And Maintenance Manual

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운반·설치상의 주의사항
TROUBLE SHOOTING (PUMP)
Trouble Cause
Trouble shooting
The motor does not
run.
The pump runs, but
doesn’t deliver
water.
Or the suction and
discharge pressure
is too low.
Water delivery is
unstable
The pump
abnormally vibrates
Overheating of the
pump
Motor stopped
due to overload
Connections are faulty. Tighten loose terminals and repair damaged wire.
Broken power cord Replace the cord.
Motor malfunction Fix or change the motor.
Low voltage
In case of lower than regulated voltage, contact an
electric power company
The suction piping leaks.
Check the connections of piping and completely
cover them up.
The mechanical seal leaks. Replace the mechanical seal.
Foreign material clogged the
pump parts.
Disassemble the pump and clean it.
The suction piping is clogged. Clean the piping.
The pump is not primed. Reprime the pump. Check the check valve and tighten it.
Low suction pressure and cavitation Compare the piping losses with NPSHa.
Power supply doesn’t reach to the
motor.
Measure the voltage of the motor terminal or
the size of cable wire.
The suction piping leaks.
Check the connections of piping and completely
cover them up.
Loosened anchor. Check anchor bolt / nut and tighten them.
Foreign material clogged the pump.
Disassemble the pump and clean it.
The pump doesn’t smoothly run. Clean the sticking around the pump.
Power connection failure Check the power of the pump.
Power supply is too low.
Check the voltage of the motor terminal.
Make sure that the voltage varies less than10%.
Foreign material clogged the
pump.
Disassemble the pump and clean it.
The ambient temperature is over
40℃.
The ambient temperature for the motor should be
lower than
40℃.
The input value of the
temperature relay is too low. Check the input current and regulate the value as
plated.
Input voltage is too low. Check the power cable and replace it if needed.
Temperature relay malfunction of
circuit breaker.
Replace it.
The diameter of suction piping is
smaller than that of suction plug. The diameter of suction piping should be equal to
that of suction plug.
Strainer or suction piping is partly
clogged.
Disassemble the pump and clean it.
Missing phase
Check the power cable and replace it if needed.
Check the terminal of power switch.
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