Operating And Fault Indications; Operating And Fault Indications Via The Boiler Displays; Fault Message Via The Remote Fault Indication - Bosch ICM Notice D'installation

16 | Operating and fault indications

5 Operating and fault indications
Operating state and faults are indicated in 4 different
ways:
• via the display of the boiler that is experiencing a
fault;
• via the remote fault indication;
• via the LEDS on the ICM module;
• via the display of the FW200 or FB100 controller.
5.1 Operating and fault indications via the
boiler displays
The operating and fault condition of each boiler can be
checked on their displays. For further details about the
operating and fault indications, see the boiler
documentation.
5.2 Fault message via the remote fault
indication
For example, a fault indicator can be connected to the
dry contact fault output (
state of the remote fault indication is also shown via an
LED on the ICM ( table 9, page 16).
LED OFF
No. Function Diagnosis
1 Line Fault: No line
voltage voltage.
K
2 Heating Operation: Pump
pump OFF
I
Table 9 Operating and fault indications on the ICM module
6 720 643 835 (2011/06)
chapter 3.2.3, page 13). The
ON
Remedy Diagnosis
Check power Operation:
supply. Standard operation.
Replace ICM
module.
Operation: Pump
ON.
Fault: Pump will not
start although the
LED is ON, as the
fuse for pump
output has blown.
5.3 Operating and fault indications via
LED
Generally, 3 different states in the overall system can be
identified:
• configuration (during start-up and after a reset);
• standard operation;
• fault present.
Depending on the state of the overall system, the LEDS
on the ICM module ( fig. 10) provide information on
the operating status or faults present of the individual
components, which allows specific troubleshooting
( table 9, page 16).
2 4
1 3
Fig. 10 Operating and fault indications via LED
1 K Line voltage (green)
I
2 Heating pump (secondary zone) (green)
H
3 Switching contact for remote fault indication 120 VAC
(red)
J
4 Communication between ICMs (green)
G
5 boiler 1 (green)
G
6 boiler 2 (green)
G
7 boiler 3 (green)
G
8 boiler 4 (green)
Flashing
Remedy Diagnosis
–
–
Replace fuse
( chapter 5.5,
page 18).
5 6 7 8
7 746 800 090-10.1O
Remedy