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Maintenance instructions
ENGLISH
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 CODE
REGOLA-
FACILE
PRIO-
RITY
DESCRIPTION SOLUTIONS
09 0 EXTERNAL PROBE
interrupted
Check the wiring, if needed
replace the external probe
14 1
RETURN PROBE
Auxiliary (SRR) sensor inter-
rupted
Check the wiring, if needed re-
place the auxiliary sensor (22)
30 2 SERVICE PARAMETERS
Service parameters altered due
to possible electromagnetic
interferences
Reset the altered parameters
via the panel and/or regola-
facile
21 3 POOR WATER CIRCULATION
Poor circulation in primary
circuit
Check pump operation (12)
and speed, if there are any
obstructions or system closure.
17 4
FLAME CONTROL FREQUENCY
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 5 WATER CIRCULATION
INSUFFICIENT
Primary circuit water circulation
insufcient (∆t > 35° C)
Check pump operation (12)
and speed - remove any heat-
ing system obstructions - clean
the scaled domestic hot water
exchanger
22 6 INCORRECT SENSOR
POSITIONING
Flow and return sensors in-
verted
Check the wiring (11) (22)
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