Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Link out the opentherm terminals as shown in the image
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow fan purge to complete (2 minutes).
Does the boiler now recognise and respond to a central heating demand?
Note:
If the boiler now responds to the central heating demand do not remove the link at this stage.
Does the boiler now recognise and respond to a central heating demand?
Note:
If the boiler now responds to the central heating demand do not remove the link at this stage.
Isolate as per TOPs P4
and refit as necessary