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Cont ...
SECTION 3 - PRINTED CIRCUIT BOARD REPLACEMENT
The parts required to replace the printed circuit board are:
ITEM
QTY
ITEM
QTY
23
Screws, Self Tapping
(K40 x 16 mm)
4
26
Adhesive Foam Pad
1
25
Printed Circuit Board
1
Note: - When fitted this printed circuit board will detect the following fault conditions:
•
Dry running caused by water starvation to the pump.
If the above fault condition occurs, then the pump will stop.
The fault should therefore be rectified before restarting the pump.
Check that there is sufficient water supply to the pump and also ensure that all outlets are
closed.
•
Protective Logic Sequence
If water starvation occurs and the power supply to the pump remains uninterrupted, the pump
controller will perform the following protective sequence.
1) If the pump detects water starvation, it will stop operation after a 1 minute period.
2) The pump will remain in the off condition for a period of 5 minutes.
3) The pump will then re-start and if the water starvation condition remains present, the pump
will then stop operation after a 1 minute period.
4) The pump will remain in the off condition for a period of 5 minutes.
5) The pump will then re-start and if the water starvation condition remains present, the pump
will then stop operation after a 1 minute period.
6) The pump will remain in the off condition for a period of 5 minutes.
7) The pump will then re-start and if the water starvation condition remains present, the pump
will then stop operation after a 1 minute period.
8) After three consecutive resets are performed the pump will remain in the off condition
indefinitely.
9) To restart the pump, the power supply should be first isolated for a period of at least 10
seconds before switching on again.
If the pump fails to operate normally after three attempts to re-start, then please consult Stuart
Turner Pump44 (0) 800 31 969 80.
•
Fault Finding
The PCB is also fitted with a “power on” indicator light. This will remain illuminated when
mains power is supplied to the board.
The indicator light is located on the PCB within the terminal box.
This operation should only be carried out by a competent person
