VOLTAGE PUMP AT PCB

Gas Off

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to AC Volts

Turn Hot Water Tap On

Remove connector CN10 (pump cable) from the PCB and make safe

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure

Mains Power On

Measure for AC voltage on pins 3 and 4 where
connector CN10 was fitted.
Expect mains voltage.

Note.
On some PCB's the connector will be labelled as CN09 not CN10, however the test points and expected results remain the same.