Stuart Turner Jet Pump 45 PS - Manual (Page 12)

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7 TROUBLE SHOOTING GUIDE
Symptoms Probable Cause Recommended Action
Pump will not start. Electrical supply. Check wiring connections.
Check all switches are ‘on’.
Check fuse (see fuse section).
Check circuit breaker is set.
Failed reed switch/PCB/
pressure switch Contact Pump Assist.
Recommended static inlet/outlet
heads exceeded. Re-position pump (see Section 2 - Location).
Internal motor thermotrip
activated. Wait for thermotrip to cool and auto-reset and investigate
cause of problem before re-starting.
Water starvation to pump. Refer to ‘dry running’ section.
Pump starts when outlets are off. Leak in system. Check tap washers, w/c valve washers, pipe joints.
or
Pump cycles (hunts) on/off
frequently.
Low charge pressure in
pressure vessel. Check charge pressure in pressure vessel
(see Section 5 - Maintenance).
Debris under non-return valve
sealing face. Run at full flow to try and flush away debris or remove, clean
or replace non-return valve.
Pump runs on when all terminal
outlets are closed. Leak in system. Check tap washers, w/c valve washers, pipe joints.
Reed clamp out of position. Ensure reed clamp is fitted correctly in location groove.
Failed 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, these
should be checked electrically.
Jammed flow switch. Isolate the pump electrically and hydraulically and remove
brass housing that contains the float. Check float for free
movement.
Pump runs, but no water. Pump air locked Remove priming plug, fill with water.
Refit plug.
Water supply low. Check water level in the supply tank or well and all stopcocks
are open.
Check outlet not restricted or blocked.
Air bubbles in suction pipe. Check connections are all airtight.
Reduced flow/performance. Blocked shower head spray
plate. Clean in accordance with manufacturers instructions.
Blocked pipework or pump. Isolate pump electrically and hydraulically, locate blockage
and remove.