IDEAL Evomax 30 Installation & Servicing Manual page 58

88 no DHW but CH ok
Are the Timer and Cylinder Thermostat/
Thermistor calling for Heat?
yes
Is an OpenTherm device connected to the
boiler (note that the ideal programmable Room
Stat is an OpenTherm device)?
no
Is there 230Vac at (C)?
yes
Does the system have a DHW Pump or Power Open
Diverter Valve?
yes
Is the boiler correctly set for a DHW Pump or Power
Open Diverter Valve?
yes
Is there 230Vac at (D)?
yes
Does wiring to external DHW Pump have continuity and
is to the correct connections?
yes
Is the boiler set for DHW priority (default setting)?
yes
Is the DHW Pump/Valve stuck
58
fAuLt fInDInG
no
Ensure that the Timer and Cylinder Stat/Thermistor
are calling for heat (if a DHW Thermistor is used
see Frame 38 for setting DHW Temp.)
yes
Does the wiring from the boiler to the
OpenTherm device have continuity?
There is no voltage from the
Timer/Cylinder Stat. This
no
is not a boiler fault. Ensure
voltage is supplied to the boiler
by correcting external wiring.
no
no
no
no
no
no
yes
(C)
Is the system correctly set for a Power
Closed Diverter Valve?
no
Set boiler correctly (See page 41)
Check wiring from PCB to (D)
Rectify wiring to external DHW pump/valve
Set boiler for DHW priority (see Frame 41)
Replace the DHW pump/valve
Free the pump/valve
(D)
EVOMAX -
Installation & Servicing
yes
no
Rectify wiring
from boiler to
OpenTherm
device
yes