General IntelliFlo 4 Troubleshooting Problems

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Use the following general troubleshooting information to resolve possible problems with your IntelliFlo 4 pump.

Note: Switch the main power off to the pump before attempting service or repair.

Problem	Possible Cause	Corrective Action

Pump failure. Refer to	Pump will not prime - Air leak in suction.	Check suction piping and valve
Alarm and warning LED		glands on any suction gate
sequence on page 27.		valves.
		Secure lid on pump strainer pot
		and make sure lid gasket is in
		place.
		Check water level to make sure
		skimmer is not drawing air.
	Pump will not prime - Not enough water.	Ensure that the suction lines,
		pump, strainer, and pump volute
		are full of water.
	Pump strainer clogged.	Clean pump strainer pot.
	Pump strainer gasket defective.	Replace gasket.

Reduced capacity and / Air pocket or leaks in suction line.		Check suction piping and valve
or head.		glands on any suctin gate valves.
Refer to Alarm and
warning LED sequence	Clogged impeller.	Turn off electrical power to the
on page 27.		pump.
		Remove the (6) bolts that holds
		the volute to the seal plate.
		Slide the motor and seal plate
		away from the volute.
		Clean debris from impeller. If
		debris cannot be removed,
		complete the following steps.
		1. Remove diffuser and o-ring.
		2. Remove left hand thread anti-
		spin bolt and o-ring.
		3. Remove, clean and reinstall
		impeller.
		4. Reinstall anti-spin bolt and
		o-ring.
		Reinstall diffuser, and o-ring.
		Reinstall motor and seal plate
		into volute.
		Reinstall (6) bolts around seal
		plate and volute and tighten
		securely.

Pump strainer clogged.

Clean suction trap.

Pentair 4/160, 4/100 important safety instructions General IntelliFlo 4 Troubleshooting Problems