MULTIQUIP st3020bcul User Manual download pdf (Page 27)

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TROUBLESHOOTING

 Pump Troubleshooting

  

Pump Fails To Start

Incorrect voltage/amps?

Check that proper voltage (230 VAC, 60 Hz, single-

phase) is being supplied to the pump. Also check that

there is an adequate amount of current (amps) to run

the pump. Check power source circuit breaker.

Check electrical connec-

tions?

If using ﬂoat switches check wiring, inspect power

cord.

Blown power fuse or tripped

circuit breaker?

Replace fuse check circuit breaker, check cause of

blown fuse or tripped breaker.

Impeller locked?

Disconnect power cord and check for clogging. Un-

clog pump. Check overload protection device.

Wet motor windings?

Use multimeter to check motor insulation. Insulation

resistance must be approximately 15 megaohms. If

resistance is low, disassemble pump motor and bake

windings to dry them.

Defective motor and pump

bearings?

Check for excessive bearing wear, if worn replace

bearings. Replace motor if defective.

Pump Fails to Deliver Full

Output

Twisted or restricted dis-

charge hose?

Lay hose ﬂat un-kinked. Remove clog from hose line.

Clogged pump strainer? Clean strainer.

Low voltage?

Use a voltmeter to check voltage while pump is

energized. Voltage must be within ±10%. Check

power source (no load and load). If an extension cord

is used, make sure it has adequate current-carrying

capacity for the required length. See Table 4.

Impeller worn? Replace impeller.

Water in Mechanical

Seal Oil

Defective mechanical seal? Replace mechanical seal.

Loose Oil Fill Plug? Tighten securely. Apply teﬂon tape.

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MULTIQUIP st3020bcul User Manual Page 27

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