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13
TROUBLE SHOOTING GUIDE
13.1
General Guide
Symptoms
Probable Cause
Recommended Action
Pump will not
start
Electrical supply.
Check power supply.
Check fuse (see fuse section).
Check circuit breaker is set.
Check wiring connections.
Pump Jammed.
If motor ‘Buzzes’ switch off power and
contact Stuart Turner.
Damaged pressure
switch.
Turn off power.
Release system water pressure.
Turn on power, pump should start. If NOT
contact Stuart Turner.
Recommended
static inlet/outlet
heads exceeded.
Re-position pump (see pump location
section).
Integral motor
thermotrip
activated.
Wait for thermotrip to auto-reset and check
that duty point and run time is within
specification (see technical specification).
Reduced/
intermittent flow
Incorrect or no
anti-aeration
flange fitted.
Check that the installation complies with
installation instructions.
Incorrect pipe
sizes.
Check for correct pipe sizing, see Section 7
Blocked inlet
filters.
Clean inlet filters (see maintenance section).
Hot water
temperature set
too high.
Reduce cylinder stat setting to 60 °C max.
Blocked shower
head spray plate.
Clean in accordance with manufacturers
instructions.
No hot water.
Air locked water
feed.
Vent hot water pump of air.
Check cold feed to hot water cylinder.
Check water level in cold water tank and
that all stopcocks and isolating valves are
open.
