Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Gain access to the PCB
Observation:
What type of external controls are connected to the boiler 24 Volt, 240 Volt or EBUS?
OBSERVATION EXTERNAL CONTROLS FITTED
24V external controls
wiring connection
wiring connection
240V external controls
wiring connection
wiring connection
EBUS external controls
wiring connection
wiring connection
Wire present in terminal RT