Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
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:
Test 1: - No Demands.
Measure for AC voltage between pin 3 white (rectification voltage)
on connector CN6 to pin 3 blue (neutral) on connector CN1.
Expect approximately 95 Volts AC.
Test 2: - Turn hot water tap ON.
Allow the fan to run and ignition sequence to commence.
As the burner ignites, measure for AC voltage between pin 3 white (rectification voltage) on connector CN6 to pin 3 blue (neutral) on connector CN1.
Expect approximately 85 Volts AC.
Note:
The appliance may go to lockout, reset as required until the test is complete.
Measure for AC voltage between pin 3 white (rectification voltage)
on connector CN6 to pin 3 blue (neutral) on connector CN1.
Expect approximately 95 Volts AC.
Test 2: - Turn hot water tap ON.
Allow the fan to run and ignition sequence to commence.
As the burner ignites, measure for AC voltage between pin 3 white (rectification voltage) on connector CN6 to pin 3 blue (neutral) on connector CN1.
Expect approximately 85 Volts AC.
Note:
The appliance may go to lockout, reset as required until the test is complete.
