4.
Strainer basket or skimmer basket loaded with debris. Remove the
strainer housing cover or the skimmer cover. Clean the basket, and refill the strainer housing
with water. Tighten the cover.
5.
Suction side clogged. Contact a qualified repair professional. If no suction is felt, check for line
blockage.
a.
If the pump develops a vacuum, check for a blocked suction line or a dirty strainer
basket. An air leak in the suction piping may be the cause.
b.
If the pump does not develop a vacuum and the pump has sufficient “priming water”:
i.
Re-check the strainer housing cover and all threaded connections for suction
leaks. Check if all system hose clamps are tight.
ii.
Check voltage to ensure that the motor is rotating at full rpm’s.
iii.
Open the housing cover and check for clogging or obstruction in suction. Check
the impeller for debris.
iv.
Remove and replace the shaft seal only if it is leaking.
Low Flow – Generally:
1.
Clogged or restricted strainer or suction line. Contact a qualified repair professional.
2.
Undersized water piping. Correct the piping size.
3.
Plugged or restricted discharge line of filter, valve partially closed (high gauge reading).
4.
Air leak in suction (bubbles issuing from return fittings). Re-tighten the suction and discharge
connections using PTFE tape. Inspect other plumbing connections, and tighten as required.
5.
Plugged, restricted, or damaged impeller. Replace the impeller including a new seal assembly.
Noisy Pump:
1.
Air leak in suction piping, cavitations caused by restricted or undersized suction line or leak at
any joint, low water level in water source, and unrestricted discharge return lines. Correct the
suction condition or throttle return lines, if practical. Holding your hand over the return fitting
will sometimes prove this, or by putting in a smaller eyeball fitting.
2.
Vibration due to improper mounting, etc. Mount the pump on a level surface and secure the
pump to the equipment pad.
3.
Foreign matter in the pump housing. Loose stones/debris hitting the impeller could be the cause.
Clean the pump housing.
4.
Motor bearings that are noisy from normal wear, rust and overheating can cause seal damage
which will allow water to seep into the bearings, causing the bearing to whine. All seal leaks
should be replaced immediately.
Interference With Home Automation/Power Line Communication Equipment:
1.
Make sure the terminal board connections agree with the wiring diagram on the pump data plate
label.
2.
Check for and correct any improper or loose wiring connections.
3.
Install noise filter (from automation/power line communication equipment vendor) to prevent
equipment interference.
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
_____________________________________________________________________________________
Hayward Flow Control
www.haywardflowcontrol.com
1-888-HAY-INDL (1-888-429-4635)
IS3401VSPFC Rev A 12/08/14
Pg. 34 of 36
