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ENGLISH
7. MAINTENANCE
No specific maintenance during operating.
7.1 Spare parts
For repair of the hydraulic part of the motor (ask us).
8. OPERATING TROUBLE
POWER TO THE PUMP MUST BE OFF before any work
is done.
CAUTION !
TROUBLE
8.1 PUMP DOES NOT
START UP
8.2 NO OUTPUT OR A
VERY LOW OUTPUT
8.3 VERY FREQUENT
STARTS OF THE
PUMP
CAUSE
a) Inadequate voltage or voltage drop:
b) Motor power cable break:
c) Motor protection ON:
a) Very low voltage:
b) The suction strainer is obstructed:
c) The sense of rotation is not correct
(three-phase motor):
d) No water or very low water level in
borehole:
a) Pressure gauge contactor difference
too low:
b)
Inadequate electrode set-up:
c) Bladder tank capacity is too low or
bladder insufficiently inflated:
REMEDIAL ACTION
a) Check voltage on start-up, an insufficient cable cross-section can
cause a voltage drop that prevents the motor from operating normally.
b) Measure the resistance between phases. Re-assemble the pump if
required and check the cable.
c) Check the current set on thermal relay and compare it to the mentio-
ned value.
Important
: if it trips repetitively, do not insist (look at the cause). Forcing
the unit to operation can damage the motor (by overheating) in a very
short time limit (around one minute).
a) Check the power supply at the switch box.
b) Reassemble the pump, clear and clean it.
c) Interchange the two phase wires inside the switch box.
d) Check this level ; it must be at least 0.20 m above the pump delivery
(during operating).
a) Increase the gap between shutdown and start-up.
b) Adjust distance between electrodes to ensure an appropriate time bet-
ween pump ON/OFF.
c) Check and adjust pressures (ON/OFF).
Check tank inflation (the tank must be water-less). This pressure must be
0.3 bar less than the pump starting pressure.
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Increase capacity with an additional tank or change the tank.
