74
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
Error
Code
Anomaly signalled
Cause
Boiler status / Solution
139
Deaeration in
progress
Signalling to remote venting function devices (except
CAR
V2
).
(1)
141
Alarm due to
connection to
outdated zones
control unit
The zones control unit does not have suitable firmware for
communicating with the boiler.
Update zones control unit fw (or
replace the board with the latest
version) (1)
142
Dominus Offline
Alarm
The Dominus is disconnected or not powered.
No communication between Dominus and the boiler.
Check that the Dominus is correctly
connected and powered
Replace the Dominus or the display
board (1)
178
Anti-legionella cycle
not successful
The anti-legionella cycle was not completed successfully
within a preset time.
Check the set anti-legionella time.
Check the thermal exchange to the
storage tank.
The error is reset by changing the
operating mode, or by pressing the
ON - OFF button (1).
300*
RF address 0
concentrator off-line
alarm
Lack of communication on BUS (wires) between concen-
trator with address “0” and boiler.
Check concentrator-boiler-display
board connection wiring
Check correct association
Replace concentrator board or display
board (1)
301*
RF address 1
concentrator off-line
alarm
Lack of communication on BUS (wires) between concen-
trator with address “1” and boiler.
Check concentrator-boiler-display
board connection wiring
Check correct association
Replace concentrator board or display
board (1)
302*
RF address 2
concentrator off-line
alarm
Lack of communication on BUS (wires) between concen-
trator with address “2” and boiler.
Check concentrator-boiler-display
board connection wiring
Check correct association
Replace concentrator board or display
board (1)
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Service Centre)
(2) The anomaly can only be verified in the list of errors in the “Information” menu
(3) Error displayed only on CAR
V2
(*) Errors visible below zone area icons.
The reset of the error signal (following a solving operation) can take up to 10 minutes. It is recommended to “force” the commu-
nication between the probe and concentrator by briefly pressing the probe button; in this way the RF communication between
the two devices will be forced and the error signal will be quickly cancelled.