Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Use Insulation Mat as required
Gain access to PCB
Selector switch set to CH/DHW position
Boiler DHW thermostat set to MAX
Gain access to PCB
Selector switch set to CH/DHW position
Boiler DHW thermostat set to MAX
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow the fan to run and the ignition sequence to commence.
Measure the AC voltage between pin 1 (blue) and
pin 2 (brown) on connector CN5 during the ignition phase.
Expect mains voltage.
Note:
The appliance may go to lockout, reset as required until the test is complete.
Measure the AC voltage between pin 1 (blue) and
pin 2 (brown) on connector CN5 during the ignition phase.
Expect mains voltage.
Note:
The appliance may go to lockout, reset as required until the test is complete.
Isolate as per TOPs P4
and refit as necessary