Troubleshooting
Motor won’t start.
– Check for improper or loose connections, open switches or relays, blown circuit breakers or fuses.
– Manually check rotation of motor shaft for free movement and lack of obstruction.
Motor cuts out – check for:
– Wiring, loose connections, etc.
– Low voltage at motor (frequently caused by undersized wiring).
– Binding and overload. (Amperage reading)
Motor hums, but does not start – check for:
– Governor stuck in open position
– Open capacitor.
Pump won’t prime.
– Make sure pump/strainer housing is filled with water and that cover gasket is clean and properly seated. Tighten hand nuts.
– Make sure all suction and discharge valves are open and unobstructed, and that pool water level is above all suction openings.
– Block off suction as close to pump as possible and determine if pump will develop a vacuum.
- If pump does not develop a vacuum and pump has sufficient “priming water”.
Tighten all bolts and fittings on suction side
Check voltage to make sure pump is up to speed.
Open pump and check for clogging or obstruction.
Remove and replace shaft seal.
- If pump develops a vacuum, check for blocked suction line or strainer, or air leak in suction piping.
Low Flow – Generally, check for:
– Clogged or restricted strainer or suction line; undersized pool piping.
– Plugged or restricted discharge line of filter (high discharge gauge reading).
– Air leak in suction (bubbles issuing from return fittings).
– Pump operation underspeed (low voltage).
– Plugged or restricted impeller.
Noisy Pump – check for:
– Air leak in suction causing rumbling in pump.
– Cavitation due to restricted or undersized suction line and unrestricted discharge lines. Correct suction condition or throttle discharge lines, if practical.
– Vibration due to improper mounting, etc.
– Foreign matter in pump housing.
– Motor bearings made unserviceable by wear, rust, or continual overheatings.
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