Stuart Turner Techflo Turbo 15T - Manual (Page 18)

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8 TROUBLE SHOOTING GUIDE
Symptoms Probable Cause Recommended Action
Pump will not start. Insufficient gravity flow. Check flow rate minimum of 0.6 l/min required on full hot and
cold.
Electrical. 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 Techflow
Products.
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 that 22 mm pipework is used on inlets and outlets.
Blocked inlet filters. Clean inlet filters (see maintenance section).
Air in system. Run system on full hot with pump switched off (ie. gravity
only) for several minutes. Check that vents are fitted as
detailed in instructions.
Hot water temperature set to
high. Reduce cylinder stat setting to 65 o 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.
Heating source not operating. Check boiler is switched ‘on’.
Check cylinder thermostat.
Check immersion heater.
Check cylinder contains hot water.
All hot water has been used. Check tank volume is adequate.
Faulty thermostatic mixer valve. Consult makers instructions.
Pump runs on with outlets
closed. Jammed flow switch. Remove outlet hoses and check that flow switch sits in lowest
position. Check float for free movement.
Damaged reed switch or P.C.B. If pump continues to run, this indicates a closed circuit in
either the flow switch reed or P.C.B. in the terminal box.
Contact Techflow Products.
Leak in system. Check tap washers, w/c valve washers, pipe joints.
Pump starts with all outlets
closed. Air in system. Bleed through system without pump running until hot and cold
services run with no air.
Flexible hose leaks Not fitted correctly. Check that the hose is pushed firmly onto the pump inlet/
outlet connections and pipework.
Damaged ‘O’-rings. Check copper pipe ends are cleanly cut and deburred.