31
Service info
2.10 FAILURE CODES
In case of failure the burner is automatically switched off, and the
cobination of different LEDs on the panel board (E.F.G. see fig. 34)
show the fault code.
Each fault is characterised by a priority level: if different failures
are detected at the same time, the code of the highest priority one
is shown.
The following failure codes are recognised:
2.10.1 - LOCKOUT (priority 7)
Description:
Lockout of the flame control due to H.L. thermostat or smoke
thermostat cut-off or loss of flame signal.
2.10.2 - LACK OF WATER (priority 6)
Description:
Insufficient water pressure: intervention of minimum water pressu-
re switch.
2.10.3 - IGNITION FAILURE (priority 5)
Description:
No flame has been detected within 20" from the start of the ignition
procedure and the burner control lockout has not intervened.
2.10.4 - WRONG FLAME DETECTION (priority 4)
Description:
False flame has been detected at ignition start-up
2.10.5 - CH TEMPERATURE SENSOR (priority 3)
Description:
CH sensor interruption or short circuit.
2.10.6 - DHW TEMPERATURE SENSOR (priority 2)
Description:
DHW sensor interruption or short circuit. This failure is not de-
tected if DHW mode is disabled.
2.10.7 - FROST (priority 1)
Description:
Freezing of the heat exchanger is detected if CH sensor < 2°C;
ignition in inhibited until CH sensor reaches 5°C.
WARNING:
If within the end of the ignition there is no flame detection the
boiler goes into permanent lockout.
To reset it will be necessary to push the reset button.
E
FG
E
FG
E
FG
E
FG
EF G
E
FG
EFG
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
OFF
OFF
ON
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
OFF
OFF
BLINK
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
OFF
BLINK
ON
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
OFF
ON
ON
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
ON
OFF
BLINK
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
BLINK
OFF
BLINK
LED
Status
CH MODE (E)
FLAME (F)
LOCKOUT (G)
BLINK
BLINK
BLINK
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