~ 6 ~
Trouble Shooting Check List
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 eg. a jammed impeller.
5. Internal motor fault.
MOTOR DOES NOT START WHEN TAP IS OPENED
1. Automatic switch has detected loss of prime.
MOTOR RUNS WHEN SWITCHED ON BUT DOES NOT PUMP
1. Suction line and pump body not filled with water.
2. Air leaks in suction lines or suction pipe not under water.
3. Air trapped in suction lines (also possible with flooded 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 lines closed.
MOTOR RUNS WHEN SWITCHED ON BUT DOES NOT PUMP, PUMPS POORLY OR FAULT LIGHT ON
CONTROLLER IS LIT (PUMP STOPS)
1. Suction line and pump body not filled with water.
2. Air leaks in suction lines or suction pipe not under water.
3. Air trapped in suction lines (also possible with flooded 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 lines closed.
6. Check valve installed in wrong direction.
7. Suction lift too high.
8. Leaking air bleed screw.
9. Blocked jet or venturi.
10. Blocked impeller.
PUMP STOPS, BUT RESTARTS QUICKLY - NO FLOW DEMAND (AUTO MODELS ONLY)
1. Leaking suction line, checkvalve or footvalve.
2. Suction pipe too long and/or too flexible.
PUMP DOESN’T SUPPLY ADEQUATE PRESSURE
1. Suction lift is too high.
2. Pump impellers partially blocked.
3. Jet blocked.
4. Partially blocked suction line.
5. Wrong pump selected.
6. Change the installation.
NOTE: For protection, the pump motor is fitted with an automatic “over temperature” cut-out. Constant
tripping of this overload device indicates a problem eg. low voltage at pump, excessive temperature (above
50
o
C) in pump enclosure.
During servicing, use only approved, non-petrochemical based oring and gasket lubrication. If unsure, consult
your Davey Dealer for advice.
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 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 qualified persons.
Summary of Contents for SJ35-04
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