76
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_ER-
ROR
Internal software error
1
IGNIT_ERROR
Three unsuccessful ignition at-
tempts in a row
2
GV_RELAY_ERROR
Failure detected in the GV relay
3
SAFETY_RELAY_ER-
ROR
Failure detected in safety relay
4
BLOCKING_TOO_
LONG
Control had a blocking error for
more than 20 hours
5
FAN_ERROR_NOT_
RUNNING
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_
SIGNATURE
Contents of Eeprom is not up to
date
10
E2PROM_ERROR
Wrong safety parameters in Ee-
prom
11
STATE_ERROR
Internal software error
12
ROM_ERROR
Internal software error
15
MAX_TEMP_ERROR
The external overheat protection
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 temperature
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_IG-
NIT
Flame is detected before ignition
23
CORRUPTED_ER-
ROR_NR
Error code RAM byte was corrupted
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
managing 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 depending thermal module
202 OUTDOOR_WRONG
Outdoor sensor is open of shorted
203 T_SYSTEM_WRONG
T_System sensor is open of short-
ed
204 T_CASCADE_WRONG T_Cascade sensor is open of
shorted
