Bosch ICM Notice D'installation page 18

18 | Operating and fault indications
LED OFF
No. Function Diagnosis
5, boiler 1 Operation: No heat
6, boiler 2 demand to the
7, boiler 3 boiler; boiler
8 boiler 4 operational
G
Operation: No
boiler connected
Configuration/
Fault: No
communication
between the ICM
module and this
boiler, although it is
installed.
Table 9 Operating and fault indications on the ICM module
1) Another boiler will be enabled automatically in case of heat demand.
5.4 Operating and fault indications via the
FB100 or FW200
The operating and fault indications of all boilers and the
ICM module can be checked on the Hydronic 3.
Information on the status LEDS on the ICM are
described in table 10. Information on status messages
on Heatronic 3 user interfaces are described in the
documentation for the controller and the boiler.
Indicator Description
A8 Break in BUS
communication
D5 Supply temperature
sensor defective.
b4 Internal electronic
fault
Table 10 Operating and fault indications via the FB100 or
FW200
6 720 643 835 (2011/06)
ON
Remedy Diagnosis
– Operation: Heat
demand to the
boiler; boiler in
operation
–
Check the
corresponding BUS
cable.
Remove fault on the
boiler.
Replace ICM
module.
Remedy
Check connecting cable
•
between the boiler and the ICM
module for cable breaks.
Replace ICM module.
•
Check supply temperature
•
sensor and connecting lead.
Eliminate the error on the
•
corresponding boiler.
Replace ICM module.
•
If the fault appears on one of
•
the boilers: Replace the PCB on
the relevant boiler.
If the fault is not attributable to
•
one of the boilers: Replace the
ICM module.
Flashing
Remedy Diagnosis
– Configuration:
Communication
between this boiler
and the ICM
module.
Fault: boiler fault
Fault: No
communication
between the ICM
module and this
boiler because it
has been
deliberately
removed.
Fault:
Communication
error between the
ICM module and
boiler.
5.5 Replacing the fuse for the heating
zone pump connection
B Interrupt the power supply.
B Open the ICM module cover (master) (
page 7).
B Replace fuse [1] with one of the same type (5 AF,
ceramic, filled with sand). A spare fuse [2] is provided
in the ICM module cover.
2
1
Fig. 11 Replacing the fuse
B Close the ICM module cover (
Remedy
Wait until the
configuration has
completed.
Remove fault on the
boiler.
Reset the
configuration
( chapter 4.3).
Check the
corresponding
connection cable.
Replace ICM
1)
module.
fig. 7,
7 746 800 090-11.1O
fig. 7, page 7).