Multiquip st3020b1, st3020bcul manual Symptom, Solution

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

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

Incorrect voltage/amps?

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-

If using float switches check wiring, inspect power

tions?

cord.

Blown power fuse or tripped

Replace fuse check circuit breaker, check cause of

Pump Fails To Start

circuit breaker?

blown fuse or tripped breaker.

Impeller locked?

Disconnect power cord and check for clogging. Un-

clog pump. Check overload protection device.

Use multimeter to check motor insulation. Insulation

Wet motor windings?

resistance must be approximately 15 megaohms. If

resistance is low, disassemble pump motor and bake

windings to dry them.

Defective motor and pump

Check for excessive bearing wear, if worn replace

bearings?

bearings. Replace motor if defective.

Twisted or restricted dis-

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

charge hose?

Clogged pump strainer?

Clean strainer.

Pump Fails to Deliver Full

Use a voltmeter to check voltage while pump is

Output

energized. Voltage must be within ±10%. Check

Low voltage?

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

Defective mechanical seal?

Replace mechanical seal.

Seal Oil

Loose Oil Fill Plug?

Tighten securely. Apply teflon tape.