Greenstar heatslave 12/18 combi( condensing)

[PhoenixServices]

been to look at this boiler to "service" numerous faults with install.

Tried to fire the heating but boiler did nothing. Fires up on hot water fine.

External Honeywell wireless stat and 2 channel timer calling for heat, 230 at heating controls on board.
What voltages and when should I be getting on the diverter wires?
Also seemed to have 230 on limit stat but wouldn't reset. Is this normal?

Was far too late and in a crampt shed to be looking at this. Will have to go back tommorrow.

 

[Vee]

Should be 230V. Not easy to get to the pins to check for voltage though. Best to remove head and check for movement of the manual lever. Diverter valve body might be sticking.