Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Gain access to PCB (use Insulation Mat as required)
Disconnect plug marked "EMS" on left hand side of boiler wiring and make safe
Disconnect plug marked "EMS" on left hand side of boiler wiring and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Reset boiler.
Does the fault code reoccur or does the boiler now enter standby?
Does the fault code reoccur or does the boiler now enter standby?
Isolate as per TOPs P4
and refit as necessary