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 fan to run and ignition sequence to commence.
Measure the AC voltage between pin 3 (blue) on CN1
and pin 1 on CN7-3
Expect mains voltage.
Note:
The appliance will only try to ignite once before going to lockout.
Reset appliance as required until the test is completed.
Measure the AC voltage between pin 3 (blue) on CN1
and pin 1 on CN7-3
Expect mains voltage.
Note:
The appliance will only try to ignite once before going to lockout.
Reset appliance as required until the test is completed.
Isolate as per TOPs P4
and refit as necessary