37
–
HEATING RETURN SENSOR ERROR
“ALL 30” (fig. 23/v)
When the heating return temperature
sensor(SR) ids open or short circuited
the display shows ALL30. During such
error the boiler continues normal fun-
ctioning.
Fig. 23/v
–
CASCADE DELIVERY SENSOR
ERROR“ALL 31” (fig. 23/w)
In cascade systems, should the casca-
de delivery temperature sensor(SMC)
become open or short circuited, the
display will show ALL31. during this
error the boilers will continue normal
functioning.
Fig. 23/w
–
THREE ZONE CONFIGURATION ERROR
“ALL 32” (fig. 23/k)
When RS-485 boards are not sufficient
number and/or at least one board is
not a mixed area, the boiler stops and
the display shows the error ALL 32.
The boiler re-start when you activate
the correct configuration for systems
with 3 zones.
Fig. 23/k
–
RS-485 COMUNICATION
ERROR IN MODBUS MODE
“ALL 33” (fig. 23/j)
When PAR 16 is different from “- -” and
there isn’t comunication between boiler
board and RS-485 board (in MODBUS
mode and at least 4 minutes) the boiler
stop and the display shows ALL 33.
The boiler re-start when the communi-
cation is restored or set PAR 16 = “- -”.
Fig. 23/j
–
RS-485 COMUNICATION
ERROR IN CASCADE MODE
“ALL 34” (fig. 23/x)
When il PAR 15 is different from “- -” and
there isn’t comunication between boiler
board and RS-485 board (in CASCADE
mode) the boiler stop and the display
shows ALL 34.
The boiler re-start when the communi-
cation is restored or set PAR 15 = “- -”.
Fig. 23/x
–
COMMUNICATION ERROR BETWE-
EN RS-485 BOARD AND RS-485 BO-
ARD “ALL 35” (fig. 23/z)
When PAR 15 is different from “- -”
and there isn’t comunication between
RS-485 board and RS-485 board the
boiler stop and the display shows ALL
35.
The boiler re-start when the commu-
nication is restored or set PAR 15 = “-
-”.
Fig. 23/z
ATTENTION: cascade installations with
a CR 73 connected, the following errors
can be displayed:
- ALARM 70
When there is an error that stops the
cascade connecting (Cascade flow
probe ALL 31) the remote control di-
splay CR 73 shows 70 error.
Check the fault on the cascade.
- ALARM 71
When there is an error in one of mo-
dules and the others continue to ope-
rate, the remote control display CR 73
shows 71 error. Check the fault on
the cascade.
