RESISTANCE DHW MICROSWITCH AND HARNESS

Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to Resistance

Remove connector A5 from the PCB
DHW taps OFF

Measurement:

Measure the resistance across connection 6 (black wire) and connection 5 (white wire) at the disconnected connector A5.
Resistance should be open circuit.

bx pt combi instant e68347 pcb in situ.gif

Note: The test corresponds to the numbering on the connector and not that stated on the PCB.