Pentair 4HP-HD - 3' STD service manual Section Vi. Troubleshooting Guide, Problem, Cause, Remedy

SECTION VI. TROUBLESHOOTING GUIDE

The following are some common causes of problems that may arise.

PROBLEM	CAUSE	REMEDY
Pump will not prime.	No water in strainer pot.	Add water to pot.
	Strainer pot lid is not tight.	Tighten lid.
	Damaged lid o-ring.	Replace o-ring.
	Water level is below skimmer.	Adjust pool water level.
	Strainer basket or skimmer basket	Clear basket.
	is clogged.
	Closed valve in piping system.	Check all valves and open all
	necessary valves.
	Pump is on low speed	Adjust to high speed.
	(two-speed units only).
	Air leak in suction line.	Find and fix leak.
	Water level is too low and the	Adjust pump level and insure
	pump cannot lift.	it is below water level.
Low flow — high filter pressure.	Filter is dirty.	Clean filter.
	Restriction in return line.	Open return line restriction.
Low flow — low filter pressure.	Strainer basket or skimmer basket	Clean basket.
	clogged.
	Clogged impeller.	Clean obstruction.
	Air leak in suction line.	Find and fix leak.
	Restriction in suction line.	Find and open restriction.
Motor does not turn.	Power switch is off.	Check power switch and reset.
	Circuit breaker has tripped.	Check circuit breaker and reset;
		if retrips contact electrician.
	Pump is in off-mode of a timer	Check timer mode.
	controlled circuit.
	Motor terminal connections are incorrect.	Have terminal connections checked
		by electrician.
	Motor shaft is locked by bad bearing.	Have motor bearings replaced
		or replace pump.
Motor over-heating.	Electrical supply connections are	Have terminal connections
	incorrect.	checked by electrician.
	Wiring to pump is undersized.	Consult electrician to rewire pump.
	Power Company supply voltage is low.	Notify Power Company.
	Ventilation is inadequate for motor.	Remove any restrictions to air flow.

P/N 350039 Rev. C 8-24-06 8