–
HEATING RETURN PROBE ANOMALY
“ALL 30” (fig. 23/24)
When the heating return probe (SR) is
open or shor t-circuited, the display
shows anomaly ALL 30. During such
anomaly the boiler continues normal
functioning.
–
CASCADE DELIVERY SENSOR ANO-
MALY “ALL 31” (fig. 23/25)
When t he cascade deliver y sensor
(SMC) is open or shorted, ALL 31 shall
be displayed.
During such anomaly, the boiler will conti-
nue to operate normally.
–
THREE-ZONE SYSTEM CONFIGURA-
TION ANOMALY “ALL 32” (fig. 23/26)
When the boards connected to the RS-
485 are not enough and/or at least one
of them it is not mixing zone board, the
boiler stops and anomaly ALL 32 is
displayed. The boiler restarts when the
boiler three-zone system configuration is
activated
–
RS-485 BOARD COMMUNICATION
ANOMALY IN MODBUS MODE “ALL
33” (fig. 23/27)
When PAR 16 is different from “- -”and
there is no communication between the
boiler board and the RS-485 board in
MODBUS mode for at least four minu-
tes, the boiler stops and anomaly ALL
33 is displayed.
The boiler restarts when communication
is restored or when PAR 16 = “- -” is set.
–
RS-485 BOARD COMMUNICATION
ANOMALY IN CASCADE MODE “ALL
34” (fig. 23/28)
When PAR 15 is different from “- -” and
there is no communication between the
boiler board and the RS-485 board in
CASCADE mode, the boiler stops and
anomaly ALL 34 is displayed.
The boiler restarts when communication
is restored or when PAR 15 = “- -” is set.
–
RS-485 AND RS-485 COMMUNICA-
TION ANOMALY “ALL 35” (fig. 23/29)
When PAR 15 is different from “- -” and
there is no communication between the
two RS-485 boards, the boiler stops and
anomaly ALL 35 is displayed. The boiler
restarts when communication is resto-
red or when PAR 15 = “- -” is set.
CAUTION: In t he event of
sequence/cascade connection, error
codes 70 and 71 will appear on the SIME
HOME remote control display:
- ALARM 70
When an anomaly affects cascade ope-
ration (cascade delivery sensor ALL
31), SIME HOME r emo t e contr ol
display will show alarm 70. Verify the
anomaly in the cascade.
- ALARM
71
When an anomaly occurs in one of the
modules and the others keep operating
to the extent permitted, the SIME
HOME remote control display will show
alarm 71. Verify the anomaly in the
cascade.
68
Fig. 23/29
Fig. 23/24
Fig. 23/25
Fig. 23/27
Fig. 23/28
Fig. 23/26
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