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COMMISSIONING AND MAINTENANCE
SUPPLY GAS PRESSURE CHECK
− Turn the main system switch "off"
− Access the module and identify the unit you want to
check (it is not necessary to do it for all the units)
− Loosen by about two turns the pressure inlet screw (1) up-
stream of the gas valve and connect the pressure gauge
− Power the thermal module by setting the system's and
the appliance's master switches to "On".
− Press the MENU key, select "System test" and press ● to
confirm.
Menu
"
"
Domestic Hot Water (DHW)
"
"
Information
"
"
Settings
"
"
System Test
"
"
− select the unit between "Master" and "Dep1 ... N"
System Test
"
"
Boiler
Managing
"
"
"
− select "Max. power" with the ▲ / ▼ keys and press ● to
confirm. The fan starts turning at its maximum speed
(which can vary based on the model).
System Test
"
"
Test State
High Power
"
"
"
Fan Speed
0
rpm
"
"
"
Ionisation
0.0 μA
"
"
DESCRIPTION
G20
G30
G31
Wobbe index
45,7
80,6
70,7
Nominal supply pressure
20
28-30
37
After the checks:
− select "OFF" with the ▲ / ▼ keys and press ● to confirm.
− Disconnect the pressure gauge and tighten again the
pressure test point screw (1) upstream from the gas valve.
System Test
"
"
Test State
Off
"
"
"
Fan Speed
0
rpm
"
"
"
Ionisation
0.0 μA
"
"
− After completing the operations, close the module doors.
76
3.3
Error List
When a display has a technical fault, a numeric error code ap-
pears that will enable the maintenance operator to identify the
possible cause.
"
There are 3 categories of errors:
1
Permanent: errors that require a manual reset
2
Temporary: errors that are automatically reset once the
cause that generated them is removed or stopped
3
Notices: simple warnings that do not block the appliance's
operation
3.3.1
Permanent Errors
Nr.
Error
Description
E2PROM_READ_ER-
0
ROR
"
"
Three unsuccessful ignition at-
1
IGNIT_ERROR
tempts in a row
2
GV_RELAY_ERROR
Failure detected in the GV relay
SAFETY_RELAY_ER-
3
Failure detected in safety relay
ROR
MJ/m
3
BLOCKING_TOO_
Control had a blocking error for
4
LONG
more than 20 hours
mbar
FAN_ERROR_NOT_
Fan is not running for more than
5
RUNNING
60 seconds
FAN_ERROR_TOO_
Fan runs too slow for more than
6
SLOW
60 seconds
FAN_ERROR_TOO_
Fan runs too fast for more than 60
7
FAST
seconds
8
RAM_ERROR
Internal software error
WRONG_EEPROM_
Contents of Eeprom is not up to
"
9
SIGNATURE
date
"
Wrong safety parameters in Ee-
10
E2PROM_ERROR
prom
11
STATE_ERROR
Internal software error
12
ROM_ERROR
Internal software error
The external overheat protection
is enabled or the T_Supply sensor
15
MAX_TEMP_ERROR
measures a temperature of over
100°C (212°F)
Flue temperature exceeded the
16
FLUE_GAS_ERROR
maximum flue temperature
17
STACK_ERROR
Internal software error
18
INSTRUCTION_ERROR Internal software error
19
ION_CHECK_FAILED
Internal software error
FLAME_OUT_TOO_
Flame still present 10 seconds after
20
LATE
closing the gas valve
FLAME_BEFORE_IG-
21
Flame is detected before ignition
NIT
Flame lost three times during a
22
Loss of flame
request
CORRUPTED_ER-
Error code RAM byte was corrupted
23
ROR_NR
to an unknown error code
29
PSM_ERROR
Internal software error
30
REGISTER_ERROR
Internal software error
3.3.2
Temporary Errors
Nr.
Error
100
WD_ERROR_RAM
101
WD_ERROR_ROM
102
WD_ERROR_STACK
103
WD_ERROR_REGISTER
106
REFHI_TOO_HIGH / REFHI_TOO_LOW
107
REFHI_TOO_HIGH / REFHI_TOO_LOW
108
REFHI_TOO_HIGH / REFHI_TOO_LOW
109
REFHI_TOO_HIGH / REFHI_TOO_LOW
110
REFHI_TOO_HIGH / REFHI_TOO_LOW
Internal software error
111
REFHI_TOO_HIGH / REFHI_TOO_LOW
112
REFHI_TOO_HIGH / REFHI_TOO_LOW
113
REFHI_TOO_HIGH / REFHI_TOO_LOW
114
FALSE_FLAME
115
LOW_WATER_PRESSURE_ERROR
118
WD_COMM_ERROR
119
RETURN_OPEN
120
SUPPLY_OPEN
122
DHW_OPEN
123
FLUE_OPEN
126
RETURN_SHORTED
127
SUPPLY_SHORTED
129
DHW_SHORTED
130
FLUE_SHORTED
133
Net Freq Error
134
RESET_BUTTON_ERROR
163
T_SELECTION1_OPEN
164
Boiler model not detected
3.3.3
Warnings
Nr.
Error
CC_LOSS_COMMUNI-
200
CATION
CC_LOSS_COMMUNI-
201
CATION
202
OUTDOOR_WRONG
203
T_SYSTEM_WRONG
204
T_CASCADE_WRONG
207
DHW sensor error
208
Zone sensor error
Boiler request dis-
209
abled
77
COMMISSIONING AND MAINTENANCE
Description
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
Flame is detected in a state
in which no flame is allowed
to be seen.
Low water pressure error
Watchdog communication
error
Return sensor open
Supply sensor open
DHW sensor open
Flue sensor open
Return sensor shorted
Supply sensor shorted
DHW sensor shorted
Flue sensor shorted
Net. freq. error detected by
the watchdog
Too many resets in a short
time period
Heat exchanger's flow rate
too low
Boiler model not set
Description
Cascade system: the burner of the
managing module has lost the signal
of one of the depending thermal
module burner
Cascade system: the managing mod-
ule has lost the signal of one of the
depending thermal module
Outdoor sensor is open of shorted
T_System sensor is open of shorted
T_Cascade sensor is open of shorted
DHW sensor error
Zone sensor error
Boiler request disabled
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