Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect EBUS wiring and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow the 4 minute pump purge to complete.
With the EBUS external controls disconnected does
the boiler respond to a CH demand?
With the EBUS external controls disconnected does
the boiler respond to a CH demand?
Isolate as per TOPs P4
and refit as necessary