11.2
Flow Switch Circuit Test
1. First confirm visually that the flow switch reed clamp has not been dislodged
during handling or installation. The clamp must be fully located within its flow
switch body groove as shown (fig 5).
Reed
Clamp
Magnet
2. To carry out the following test you will need to obtain a magnet, a typical fridge
magnet is suitable.
3. Ensure the power supply is switched on.
4. Position the magnet directly in front of the reed clamp as shown. If pump does
not start, then slowly move the magnet up and down to a position that exceeds
the extent of the reed clamp. The pump should instantaneously start at some
point during this extent of movement.
If this does not happen, this indicates a possible fault with the reed switch or the
P.C.B which is located within the pump casing. These should be checked
electrically. Consult Stuart Turner for further instructions.
Figure 5
16
Groove
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