Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Gain access to PCB (use Insulation Mat as required)
Boiler Switch in Standby position
Central Heating switch in OFF (central) position
Boiler Switch in Standby position
Central Heating switch in OFF (central) position
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Turn on hot water tap and observe DHW demand LED on modulation control board.
