58
COMMISSIONING AND MAINTENANCE
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
0
E2PROM_READ_ERROR
Internal software error
1
IGNIT_ERROR
Three unsuccessful ignition
attempts in a row
2
GV_RELAY_ERROR
Failure detected in the GV
relay
3
SAFETY_RELAY_ERROR
Failure detected in safety
relay
4
BLOCKING_TOO_LONG
Control had a blocking error
for more than 20 hours
5
FAN_ERROR_NOT_RUN-
NING
Fan is not running for more
than 60 seconds
6
FAN_ERROR_TOO_SLOW
Fan runs too slow for more
than 60 seconds
7
FAN_ERROR_TOO_FAST
Fan runs too fast for more
than 60 seconds
8
RAM_ERROR
Internal software error
9
WRONG_EEPROM_SIG-
NATURE
Contents of Eeprom is not up
to date
10
E2PROM_ERROR
Wrong safety parameters in
Eeprom
11
STATE_ERROR
Internal software error
12
ROM_ERROR
Internal software error
15
MAX_TEMP_ERROR
The external overheat pro-
tection is enabled or the
T_Supply sensor measures
a temperature of over 100°C
(212°F)
16
FLUE_GAS_ERROR
Flue temperature exceeded
the maximum flue temper-
ature
17
STACK_ERROR
Internal software error
18
INSTRUCTION_ERROR
Internal software error
19
ION_CHECK_FAILED
Internal software error
20
FLAME_OUT_TOO_LATE
Flame still present 10 seconds
after closing the gas valve
21
FLAME_BEFORE_IGNIT
Flame is detected before
ignition
23
CORRUPTED_ERROR_NR
Error code RAM byte was cor-
rupted to an unknown error
code
29
PSM_ERROR
Internal software error
30
REGISTER_ERROR
Internal software error
3.3.2
Temporary Errors
Nr.
Error
Description
100 WD_ERROR_RAM
Internal software error
101
WD_ERROR_ROM
Internal software error
102
WD_ERROR_STACK
Internal software error
103
WD_ERROR_REG-
ISTER
Internal software error
106 REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
107
REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
108 REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
109 REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
110
REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
111
REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
112
REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
113
REFHI_TOO_HIGH /
REFHI_TOO_LOW
Internal software error
114
FALSE_FLAME
Flame is detected in a state in
which no flame is allowed to be
seen.
115
LOW_WATER_PRES-
SURE_ERROR
Low water pressure error
118
WD_COMM_ERROR
Watchdog communication error
119
RETURN_OPEN
Return sensor open
120
SUPPLY_OPEN
Supply sensor open
122
DHW_OPEN
DHW sensor open
123
FLUE_OPEN
Flue sensor open
126
RETURN_SHORTED
Return sensor shorted
127
SUPPLY_SHORTED
Supply sensor shorted
129
DHW_SHORTED
DHW sensor shorted
130
FLUE_SHORTED
Flue sensor shorted
133
Net Freq Error
Net. freq. error detected by the
watchdog
134
RESET_BUTTON_ER-
ROR
Too many resets in a short time
period
163
T_SELECTION1_OPEN Heat exchanger's flow rate too low
3.3.3
Warnings
Nr.
Error
Description
200
CC_LOSS_
COMMUNI-
CATION
Cascade system: the burner of the man-
aging module has lost the signal of one of
the depending thermal module burner
201
CC_LOSS_
COMMUNI-
CATION
Cascade system: the managing module
has lost the signal of one of the depend-
ing thermal module
202 OUTDOOR_
WRONG
Outdoor sensor is open of shorted
203 T_SYSTEM_
WRONG
T_System sensor is open of shorted
204 T_CASCADE_
WRONG
T_Cascade sensor is open of shorted
