CH OPERATION

Set Appliance State:

CH Demand

CH temperature control to max

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

Mains Power On

Observation:

Note:
This appliance incorporates a Siphon Fill program, this keeps the boiler running on minimum output for central heating for 15 minutes and is activated every time the boiler is turned off and then back on again or if the boilers central heating thermostat is turned to summer mode and then turned back up.
Turning the appliance off then on again starts the cycle from the beginning.
If the boiler does not exit Siphon fill program after elapsed time and/or is intermittent, click Factory reset procedure

wc greenstar cdi h99778 pcb siphon fill mode.gif

The siphon fill program is indicated by the following symbol, alternating with the central heating flow temperature in the display.

Allow the boiler to ignite and run on central heating operation, after siphon fill program completion is the heating operating correctly?