38
221469B
3 Fault Finding
4689
YES
Isolate supply. Isolate external controls
from terminals 1 and 2 of the five pole
connector. Link terminals 1 and 2 in the 5
pole connector. Restore supply.
Does pump operate?
Isolate supply. Disconnect wiring at
selector switch. With switch in the "ON"
position is there continuity across switch terminals?
Check wiring of external controls,
rectify as necessary.
Reconnect selector switch.
Disconnect block 4 from PCB.
Is there continuity across selector switch pins on
block 4?
Link terminals 5 and 6 on block 6.
Restore supply.
Does pump operate?
NO
YES
YES
NO
YES
NO
Faulty switch. Replace.
Faulty control PCB. Replace.
Does pump operate?
YES
NO
NO
Check continuity from block 4 to
selector switch. Rectify as necessary
Check continuity of cable between
five pole connector and block 6.
Rectify as necessary.
Diagram 3.8
Continued from diagram 3.7
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