Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove the external controls wiring or external controls link from terminals 5 and 6 of the terminal strip and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow fan purge to complete (2 minutes).
Does the boiler still try to fire for a CH demand once the fan purge has completed?
Does the boiler still try to fire for a CH demand once the fan purge has completed?
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Isolate as per TOPs P4
and refit as necessary