DISCONNECT INTERNAL TIMER/PROGRAMMER

Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

If fitted, disconnect timer/programmer or receiver from connector X5 & make safe (see note)
No demands

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure

Mains Power On

Observation:

With X5 disconnected, does the pump still
run continuously and / or boiler attempt to
fire after self-check has completed?

vm vitodens 25 kw combi inner boiler dis pcb.gif

Connector X5 for time switch or wireless receiver (if fitted)

Note.
If no timer/programmer or wireless receiver is fitted to connector X5 then choose "PUMP STILL RUNS AND/OR BOILER STILL ATTEMPTS TO FIRE" from below.