Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Place a wire link between the left two terminals of the main terminal strip (Room stat / timer)
Place a wire link between the left two terminals of the low voltage terminal strip (Opentherm)
Note that link may already be fitted to one or more terminals
Place a wire link between the left two terminals of the low voltage terminal strip (Opentherm)
Note that link may already be fitted to one or more terminals
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the boiler now fire on a heating demand?
Note:
If boiler still does not fire for heating leave
links in place until diagnosis is complete.
Note:
If boiler still does not fire for heating leave
links in place until diagnosis is complete.
