Set Appliance State:
Mains Power Off
Gas Off
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Mode Selector Switch to DHW position
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Is there Mains Voltage present between connector M1 connection 1 (Blue) and connection 2 (Black)?
Note:
Mains voltage measurements must be taken whilst the spark ignition sequence is operating.
The sparking will only continue for approximately 10 seconds before the boiler goes to lockout.
Turn selector switch to reset/lockout position after test.
Note:
Mains voltage measurements must be taken whilst the spark ignition sequence is operating.
The sparking will only continue for approximately 10 seconds before the boiler goes to lockout.
Turn selector switch to reset/lockout position after test.
Isolate as per TOPs P4
and refit as necessary