Temporary Errors; Warnings; State - Riello TAU Unit 50 Installation And Maintenance Manual

COMMISSIONING AND MAINTENANCE
3.4.2

Temporary Errors

Nr. Error
100 WD_ERROR_RAM
101 WD_ERROR_ROM
102 WD_ERROR_STACK
103 WD_ERROR_REGISTER
REFHI_TOO_HIGH / REF-
106
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
107
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
108
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
109
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
110
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
111
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
112
HI_TOO_LOW
REFHI_TOO_HIGH / REF-
113
HI_TOO_LOW
114 FALSE_FLAME
LOW_WATER_PRESSURE_ER-
115
ROR
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
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.
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
3.4.3

Warnings

Nr. Error
CC_LOSS_COMMUNI-
200
CATION
CC_LOSS_COMMUNI-
201
CATION
202 OUTDOOR_WRONG
203 T_SYSTEM_WRONG
204 T_CASCADE_WRONG
64
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
module has lost the signal of one
of the depending thermal module
Outdoor sensor is open of shorted
T_System sensor is open of short-
ed
T_Cascade sensor is open of
shorted