ADDITIONAL SYMBOLS GUIDE

Observation:

Alternates with boiler temperature to signify minimum output when in service mode.
Alternates with boiler temperature to signify maximum output when in service mode.
Displays to signify the boiler is in air purge mode. Will automatically reset after approximately 8 minutes if left uninterrupted, the burner will not ignite while the symbol is displayed.
Alternates with boiler temperature to signify preheat mode in operation.

wc greenstar cdi h99778 pcb service mode min.gif

wc greenstar cdi h99778 pcb service mode max.gif

wc greenstar cdi h99778 pcb air purge mode.gif

wc greenstar cdi h99778 pcb siphon fill mode.gif

wc greenstar cdi h99778 pcb pump blocked.gif

wc greenstar cdi h99778 pcb temp gradient too high.gif

wc greenstar highflow erp dis preheat mode.jpg

Alternates with boiler temperature to signify siphon fill mode, Will automatically reset after 15 minutes if left uninterrupted.
Alternates with the boiler temperature to signify a blocked pump, refer to fault code E9.
Alternates with the boiler temperature to signify an excessive temperature gradient, refer to fault code E9.

For further information on the appliances various service mode functions and symbols please refer to Adapt.