Troubleshooting - Pentair Pool Products WhisperFlo Owner's Manual

DO NOT run the pump dry. If the pump is run dry, the mechanical seal will be damaged and the pump will start leaking. If this occurs,
the damaged seal must be replaced. ALWAYS maintain proper water level in your pool (half way up skimmer opening). If the water
level falls below the skimmer opening, the pump will draw air through the skimmer, losing the prime and causing the pump to run dry,
resulting in a damaged seal.
Continued operation in this manner could cause a loss of pressure, resulting in damage to the pump case, impeller and seal.
B. Priming the Pump.
1. The pump strainer pot must be filled with water before the pump is initially started. Follow these steps to prime the
pump:
a. Remove the pump lid plastic clamp. Remove the pump lid.
b. Fill the pump strainer pot with water.
c. Reassemble the pump cover and plastic clamp onto the strainer pot. The pump is now ready to prime.
d. Open the air release valve on the filter, and stand clear of the filter.
e. Turn on the switch or time clock.
f. When water comes out of the air release valve, close the valve. The system should now be free of air and
recirculating water to and from the pool.
2. For 2-speed pumps:
a. Pump should run on high-speed for priming.
b. The pump should not run longer than 8 minutes before priming is achieved.
SECTION V. TROUBLESHOOTING
A. Failure to Pump.
1. Pump will not prime - too much air. - Remedy:
a. Check suction piping and valve glands on any suction gate valves.
b. Secure lid on pump strainer pot and make sure lid gasket is in place.
c. Check water level to make sure skimmer is not drawing air.
2. Pump will not prime--not enough water. - Remedy:
a. Make sure suction lines, pump strainer, and pump volute are full of water.
b. Make sure valve on suction line is working and open, (some systems do not have valves).
c. Check water level to make sure water is available through skimmer.
3. Pump strainer clogged. - Remedy:
a. Clean pump strainer pot.
4. Pump strainer gasket defective. - Remedy:
a. Replace gasket.
B. Reduced Capacity and/or Head.
1. Air pockets or leaks in suction line. - Remedy:
a. See item A.1. of this section, above.
2. Clogged impeller. - Remedy:
a. Disassemble; per SECTION III. A. Pump Disassembly.
b. Clean debris from impeller. If debris cannot be removed, complete the following steps.
(1) Remove left hand thread anti-spin bolt and O-ring.
(2) Remove, clean and reinstall impeller.
c. Reassemble; per SECTION III. B. Pump Reassembly.
3. Pump strainer clogged. - Remedy:
a. Clean suction trap.
Rev. H 04/20/12
CAUTION
NOTE
7 P/N 071109