Bosch ICM Notice D'installation page 17

LED OFF
No. Function Diagnosis
3 Switching Operation: No
contact for switching contact
H
remote not activated; not a
fault fault.
indication
Fault: No switching
120 VAC
contact activated,
but no line voltage.
4 Communic Operation: No
ation communication
J
between this ICM
module and the
previous module or
the heating
controller
Hydronic 3.
Fault: No
communication
between this ICM
module and the
previous module or
the heating
controller
Hydronic 3.
Table 9 Operating and fault indications on the ICM module
ON
Remedy Diagnosis
– Fault: boiler
attached to the ICM
not operational.
Check power Fault: Supply
supply. temperature sensor
defective.
Replace ICM
module.
Fault: System
pressure too low.
Fault: no
communication
between the ICM
module and all
connected boilers
for at least 1
minute.
Standard operating Operation:
mode with only Communication
1 ICM module or between this ICM
with the ICM module and the
master without previous module or
Hydronic 3. the heating
controller
Hydronic 3.
Check the
corresponding
connection cable.
Replace the ICM
module or heating
controller.
Operating and fault indications | 17
Flashing
Remedy Diagnosis
Remove fault(s) on
the boiler(s).
Check temperature
sensor on the ICM
master and its lead.
Replace the ICM
module.
Add water to the
system.
Check the
corresponding
connection cable.
Replace ICM
module.
– Configuration:
Communication
between this ICM
module and the
previous module or
the heating
controller (2-wire
BUS).
Fault: No
communication
between this ICM
module and the
previous module or
the heating
controller (2-wire
BUS), although
these components
are installed.
Fault: No
communication
between this ICM
module and the
previous module or
the heating
controller (2-wire
BUS) because these
components have
been deliberately
removed
Remedy
Wait until the
configuration has
completed. The LED
will then be
illuminated steadily.
Check the
corresponding
connection cable.
Replace the ICM
module or heating
controller.
Reset the
configuration
( chapter 4.3).
6 720 643 835 (2011/06)