Installation Manual
COMBI - TA05A005.C0604
19
FAULT POSSIBLE
CAUSE REMEDY
1
)
the boiler electrical power is on, the
pump circulates and the fan runs but
the flame doesn’t ignite and the boiler
does not lock-out.
a.
air pressure switch
a.
replace it
2
)
the pump circulates and the fan runs
but the flame does not ignite, there is
no sparkling and after 10 seconds the
boiler locks- out.
b.
limit thermostat 90°c
b.
replace it
3
)
the boiler has stopped, everything is
locked-out, only water pressure
indicators 1-1.5 are on.
c.
heating sensor damaged
c.
replace it
4
)
the boiler ignites but only at the
minimum power.
d.
ignition board wires reserved
(colour: grey-brown)
d.
connect properly
5
)
the pump circulates and the fan runs,
the flame ignites but after 10 seconds
stops and locks-out.
e.
live-neutral wires inverted,
f.
ionisation electrode damaged
g.
ignition board damaged
h.
no earth, electrical supply live-live
e.
connect properly
f.
replace it
g.
replace it
h.
make proper earth connection
6)
the boiler ignites, the temperature rises
very fast and the boiler locks-out.
i.
circulating pump broken
i.
replace it
7
)
the boiler is off, lights are off,
everything is off.
j.
no electrical power
k.
water pressure switch broken
j.
check boiler power supply
k.
replace it
8
)
the pump circulates but the fan doesn’t
run, no lock-out.
l.
exhaust fan broken
m.
air pressure switch faulty
l.
replace it
m.
replace it
