Table 10
Fault/Error
Cause
Solution
1-
The
boiler does not start
up
- Lack
of
electricity. -
Check
the electricity connections.
by
turning the
ON/OFF
button
to
'ON'
position.
(L3
is
not
ON).
2-
Flame failure lockout: - No flame
in
burner after 5
-
Press
the
reset push-button
PB1
When turning the
ON/OFF
button ignition trials.
and
hold
it for 2 seconds. - If
the
to
'
ON
' position,
LED
L4
tums
ON
lockout
condition
continues
after
to
indicate
the lockout position
pressing
the
reset push-button,
after
LED
L3
blinks for several
check
the
gas
inlet
and
supply
seconds.
valves.
- Having all tries
expired,
consult
qualified
service.
3-
CH
NTC
error:
LED
L3
is
blinking
-
CH
sensor
is
out
of
operating
-
Check
the
CH
inlet
valve
and
fast
and
L4
is
ON.
range
and
this
condition lasted
radiator
valves whether it
is
open
for more than 1 0 seconds.
or
not.
-
The
system stays in
blocking
condition
until
CH
sensor
is
in
operating
range. If
repeated,
consult
qualified
service.
4-
DHW
NTC
error:
LED
L6
is
-
DHW
sensor
is
out
of
operating
-
Check
the
CH
inlet
valve
and
blinking fast
and
L4
is
ON. range
and
this
condition lasted
radiator
valves whether it
is
open
for more than 1 0 seconds.
or
not.
-
The
system stays in
blocking
condition
until
DHW
sensor
is
in
operating
range. If
repeated,
consult
qualified
service.
5- High
limit lockout: -
If
limit thermostat
is
open, error
-
Check
the
flue
connections
I
LED
L4
is
blinking fast. will
be
generated. chimney.
-
Press
the
reset push-button
PB
1
and
hold
it for 2 seconds.
-
If the lockout condition continues
after
pressing
the
reset push-
button,
consult
qualified
service.
6-
APS
Error:
LED
L7
is
blinking - Insufficient flue draught -
Check
the flue connections.
fast
and
L4
is
ON.
-
Press
the reset push-button
PB
1
and
hold it for 2 seconds.
-
If
the lockout condition continues
after pressing the reset push-button,
consult qualified service.
36
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