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8.
TROUBLE SHOOTING GUIDE
Symptoms
Pump will not start.
Insufficient water
pressure from pump.
No water being
discharged when
pump is running.
Pump runs on with
outlets closed.
Pump cycles (hunts)
on/off frequently.
Probable Cause
Electrical supply.
Pump Jammed.
Recommended static inlet/ outlet
heads exceeded.
Control panel damaged.
Pressure setting incorrect.
Strainer clogged (if fitted).
Inlet pipe work of insufficient
diameter.
Blockage in inlet pipe.
Pump is not primed with water.
Water supply failed.
Pump check valve stuck.
Pump drawing in air causing
cavitation when drawing water
from negative head situation.
Leak in system.
Debris under non-return valve
sealing face.
Recommended Action
Check power supply.
Check fuse (see fuse section).
Check circuit breaker is set.
Check wiring connections.
Contact Stuart Turner.
Re-position pump (see pump
location section).
Contact Stuart Turner.
Ensure pressure set on pump is
of required value.
Ensure the strainer is clear.
Check dimension of pipe work.
Ensure pipework is not blocked
or restricted.
Remove drain plug from bottom
of pump and ensure system is
filled with water.
Check water supply.
Contact Stuart Turner.
Check for leaks on inlet pipes.
Provide pump with positive
head supply of water.
Check tap washers, w/c valve
washers, pipe joints.
Run at full flow to try and flush
away debris or remove, clean or
replace non-return valve.
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Do you have a question about the MAINSBOOST VariQ and is the answer not in the manual?
Questions and answers
The pump is making a loud humming noise probably best described as vibration noise. The water pressure in the house is still normal. I tried resetting the pump but the noise came straight back instantly.
A loud humming or vibration noise in a Stuart Turner MAINSBOOST VariQ pump could be caused by the pump being mounted in a way that amplifies noise through loose panels or pipework. Care must be taken during installation to ensure secure mounting to avoid such noise issues.
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is it normal that variq pump in my home goes off frequently if no taps are on please
No, it is not normal. If the Stuart Turner MAINSBOOST VariQ pump turns off frequently when no taps are on, it may indicate a leak in the system, debris under the non-return valve sealing face, or improper pipework installation. Running the pump at full flow to flush debris or checking and replacing the non-return valve may help resolve the issue.
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Pump keeps making knocking noise approx every 30 sec when not in use.