Trouble Shooting - Stuart Turner PH 45 TS FL Installation, Operation & Maintenance Instructions Manual

6 TROUBLE SHOOTING GUIDE
Symptoms
Pump will not start.
Reduced/intermittent flow.
No hot water.
Pump runs on with outlets
closed.
Pump starts with all outlets
closed.
Probable Cause
Insufficient gravity flow.
Electrical.
Pump jammed.
Integral motor thermotrip
activated.
Incorrect or no anti-aeration
flange fitted.
Incorrect pipe sizes.
Blocked inlet filters.
Hot water temperature set
to high.
Blocked shower head spray
plate.
Air locked water feed.
Heating source not operating.
All hot water has been used.
Faulty thermostatic mixer
valve.
Jammed flow switch.
Damaged reed switch or
P.C.B.
Leak in system.
Air in system.
Recommended Action
Check flow rate minimum of 0.6 l/min required on full hot
and cold.
Check power supply.
Check fuse (see fuse section).
Check circuit breaker is set.
Check wiring connections.
If motor 'Buzzes' switch off power and contact Stuart
Turner.
Wait for thermotrip to auto-reset and check that duty
point and run time is within specification (see technical
specification).
Check that the installation complies with installation
instructions.
Check for correct pipe sizing, see Page 8 - Section 4.11.
Clean inlet filters.
Reduce cylinder stat setting to 80
Clean in accordance with manufacturers instructions.
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.
Check boiler is switched 'on'.
Check cylinder thermostat.
Check immersion heater.
Check cylinder contains hot water.
Check tank volume is adequate.
Consult makers instructions.
Remove outlet pipework and check that flow switch sits in
lowest position. Check float for free movement.
Check visually reed seated in groove on flow switch body.
Position a magnet directly in front of the reed, slowly move
the magnet up and down to a position that exceeds the
extent of the reed clamp. If the pump does not start a
possible reed switch or P.C.B fault is indicated.
Contact Stuart Turner.
Check tap washers, w/c valve washers, pipe joints.
Bleed through system without pump running until hot and
cold services run with no air.
- 14 -
C max.
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