Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Turn Hot Water Tap On
Gain access to PCB (use Insulation Mat as required)
Pull connector X4 back slightly to expose soldered points on PCB as shown
Pull connector X4 back slightly to expose soldered points on PCB as shown
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Reset appliance to skip self check and allow boiler to begin ignition sequence.
During the sparking stage of the ignition sequence approximately
22V DC should be present between pin 1 (red) and pin 2 (black)
at connector X4 on the PCB.
Note:
If boiler goes to lockout reset as necessary until test complete.
During the sparking stage of the ignition sequence approximately
22V DC should be present between pin 1 (red) and pin 2 (black)
at connector X4 on the PCB.
Note:
If boiler goes to lockout reset as necessary until test complete.
Isolate as per TOPs P4
and refit as necessary