57
EVOMAX
-
Installation & Servicing
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87 no CH but DHW ok
Set for Winter operation (see Frame 36)
no
Is the boiler set for Winter operation?
yes
Are the Timer and Room Thermostat calling for Heat?
Ensure that the Timer and Room
Thermostat are calling for heat
no
yes
Are the Radiator Valves open?
Open the Radiator Valves
no
yes
Is an OpenTherm device connected to the boiler (note
that the Ideal Prog Room Stat is an OpenTherm device)?
Does the wiring from the boiler to the
OpenTherm device have continuity?
yes
no
Rectify wiring from boiler
to OpenTherm device
no
Is there 230Vac at (A)?
There is no voltage from the Timer/
Room Stat. This is not a boiler fault.
Ensure voltage is supplied to the
boiler by correcting external wiring
no
yes
Is there 230Vac at (B)?
Check wiring from PCB to (B)
no
yes
yes
Does wiring to external CH Pump have continuity and is
to the correct connections?
Rectify wiring to external CH pump
no
yes
Is the CH pump stuck
Replace the CH pump
no
yes
Free the pump
(B)
(A)
206210-3.indd 57
09/06/2011 13:35:01
