4.6 - ERROR CODES
The symbol ashes on the display monitor when the boiler detects an
anomaly.
1) In the event of an anomaly that does not stop boiler operation, press
the unblock key to display the error code; in the event the boiler is in
stand-by, the error code appears and remains xed on the display.
2) In the event of an anomaly that causes boiler down time, the error
code ashes directly on the display.
Each fault is characterised by a priority level: if two faults are detected
at the same time, the code with the highest priority is displayed. The
fault codes are listed below:
( Num ) = see key Par. 2.2
SyMBOL
ONSERVICE
PANEL
CODE
REGOLA-
FACILE
CODE
EASY
r
DESCRIPTION SOLUTIONS
09 09 EXTERNAL PROBE
interrupted
Check the wiring, if needed
replace the external probe
14 14
RETURN PROBE
Auxiliary (SRR) sensor inter-
rupted
Check the wiring, if needed re-
place the auxiliary sensor (22)
45 2
OVER PRESSURE WATER
Detected if pressure transdu-
cer is present H
2
O > di 2,5 bar
is reset automatically when
pressure is H
2
O < 2 bar
Wait values return to the stan-
dard limits / Replace Transdu-
cer.
Check expansion vessel pre-
load.
30 30 SERVICE PARAMETERS
Service parameters altered
due to possible electromag-
netic interferences
Reset the altered parameters
via the panel and/or regola-
facile
21 21 POOR WATER CIRCULA-
TION
Poor circulation in primary
circuit
Check pump operation (12)
and speed, if there are any
obstructions or system closure.
17 17
FLAME CONTROL FREQUEN-
CY BEYOND LIMIT
Depends on the power supply
mains (Frequency and voltage
beyond default limits)
Wait for the values to return to
the default limits
15 15 WATER CIRCULATION
INSUFFICIENT
Primary circuit water circula-
tion insucient (∆t > 35° C)
Check pump operation (12)
and speed - remove any heat-
ing system obstructions - clean
the scaled domestic hot water
exchanger
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