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10. Trouble Shooting
WARNING: When servicing
or attending pump, always
ensure power is switched off
and lead unplugged. Electrical
connections should be serviced
only by qualified persons.
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.
A. IF MOTOR RUNS, BUT PUMP DOES
NOT DELIVER WATER, OR FLOW RATE
IS REDUCED, ONE OR MORE OF THE
FOLLOWING MAY BE THE CAUSE:
1.
Pump not primed:
Refer instructions on Priming and Operation.
2.
Leaks in Piping or from seal:
Check suction piping and repair any leaks.
A leaking seal may also prevent pump operating.
3.
Low water level:
Foot valve (entry) out of water or suction lift too
great because of reduced water level. Extend
piping and/or re-site pump closer to the water.
4.
Total pump delivery head too great:
Calculate total pump head and check against
pump’s published performance. Reduce head,
use larger pipe or use higher head pump.
5.
Piping or pump blocked:
Check both piping and pump internals and
unblock as required. Special attention should
be paid to inspecting the internals of the
impeller for blockages.
6.
Defective valves:
Check that foot valve can open and valves in
piping will allow water to pass (are they installed
in the correct direction?) Repair or replace any
defective valves.
7.
Incorrect direction of rotation – 3 phase models:
Check that impeller rotates in an anti-clockwise
direction when viewed from suction end.
TO CHANGE DIRECTION OF
ROTATION FOR 3 PHASE MODELS,
SWAP ANY TWO POWER LEADS
AT MOTOR – REFER “POWER
CONNECTION INSTRUCTIONS”.
B. IF MOTOR FAILS TO RUN, ONE OR MORE OF
THE FOLLOWING MAY BE THE CAUSE:
1.
Pump not connected:
Check power point to ensure power is available.
Check fuses and main power supply switch.
The electrical connections and
checks must be made by a
qualified electrician and comply
with applicable local standards.
2.
Voltage too low:
Eliminate long leads or replace with heavier,
higher capacity leads.
3.
Overload tripped:
Determine the cause of overload tripping
and rectify.
4.
Motor not free to turn:
Remove end cap, and using a screwdriver in slot
at end of shaft, check that motor shaft is free to
turn. If not free, remove pump body and rectify
cause of binding.
5.
Internal motor fault:
Have unit checked by your local Davey Dealer.
11. Spare Parts
When ordering spare parts, it is essential
to give both pump model and motor type
numbers from nameplate as well as the
full description on part required.
