Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Unplug all external wiring connections and make safe
Ensure NO demands are present
Note:
A new boiler out of the box or a new PCB will have a wire link across the 24 volt external controls connections, this should be removed (only applicable for EBUS controls)
Ensure NO demands are present
Note:
A new boiler out of the box or a new PCB will have a wire link across the 24 volt external controls connections, this should be removed (only applicable for EBUS controls)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the CH symbol remain on
the display (CH demand)?
the display (CH demand)?
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 connector x100.gif)
Isolate as per TOPs P4
and refit as necessary