9
Trouble Shooting Check List
A) MOTOR RUNS WHEN SWITCHED ON BUT DOES NOT PUMP.
1. Suction line and pump body not lled with water.
2. Air leaks in suction lines or suction pipe not under water.
3. Air trapped in suction lines (also possible with ooded suction due to
uneven rise in piping; eliminate humps and hollows).
4. No water at source or water level too low.
5. Valve on suction line closed.
B) PUMP SWITCHES ON AND OFF FREQUENTLY (CYCLING).
1. Check that tank air pressure is correct.
2. Leaking taps, oat valves etc. Check plumbing.
3. Leaking check valve/foot valve.
4. Pressure Switch may require adjustment to cater for ooded suction
installations – consult your Davey dealer for advice.
C) MOTOR DOESN’T START WHEN SWITCHED ON
1. Power not connected.
2. Supply voltage too low.
3. “Over temperature” cut out tripped.*
4. Motor not free to turn e.g. a jammed impeller.
5. Internal motor fault.
NOTE: For protection, single phase Davey pump motors are tted with
an automatic “over temperature” cut-out. Constant tripping of this
overload device indicates a problem e.g. Low voltage at pump, excessive
temperature (above 50°C) in pump enclosure.
Care should also be taken when servicing or disassembling pump to avoid
possible injury from hot pressurised water. Unplug pump, relieve pressure
by opening a tap on the discharge side of the pump and allow any hot
water in the pump to cool before attempting to dismantle.
WARNING: When servicing or attending pump, always ensure power
is switched off and lead unplugged. Electrical connections should be
serviced only by qualied persons. If the electrical supply lead of this
pressure system is damaged, it must only be replaced by authorised Davey
service personnel as special tools are required.
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