Bosch FR 120, Installation And Operating Instructions Manual

Page: 53 / 68

6 720 800 817 (2012/02)
Troubleshooting
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53
Fault 02
Internal fault
Some parameters reset to factory settings
due to EEPROM problem 205 Some parameters reset to
default.
Check parameter settings and
readjust as necessary. Identify
faulty controller and replace.
Fault 02
Internal fault
FR120 can no longer control the CH system 255 FR 120 can no longer control
the heating system.
Identify faulty controller and
replace.
Fault 03
Room temp sensor faulty 20 The room temperature sensor
built into FR 120 / FR 10 has
suffered a break. Identify faulty controller and
replace.
21
There is a short circuit on the
room temperature sensor built
into the FR 120 / FR 10.
Fault 10
System configuration: invalid 190 Incorrect type of connection 1-
2-4 set.
Check system configuration
and set BUS as connection
type.
Fault 11
System configuration: new BUS device
New ISM detected. Power up all ISMs
simultaneously and start automatic system
configuration. 131
132 New ISM detected. Power up all ISM
simultaneously and start
automatic system
configuration.
Fault 11
System configuration: new BUS device
New IPM detected. Check and modify
system configuration.
135
137
New IPM detected. Check and adjust system
configuration.
Fault 12
System configuration: BUS device missing
ISM1/ISM2not detected. Check connection.
170
171
ISM1/ISM2 no longer detected
in spite of having been
configured. Check connection.
Fault 12
System configuration: BUS device missing
IPM for cylinder downstream of low loss
header not detected. Check connection and
identification.
172
173
IPM for cylinder downstream of
low loss header not detected. Check and correct code. With
the IPM isolated from the
power supply.
Fault 12
System configuration: BUS device missing
IPM with identification x not detected.
Check connection and identification.
178
179
IPM with code x not detected Check and correct code. With
the IPM isolated from the
power supply.
Fault 13
System configuration: BUS device changed
or replaced
Check system configuration for DHW or start
automatic system configuration.
157 BUS subscriber changed or
replaced.
Check system configuration for
DHW heating or start automatic
system configuration.
Information displayed (
Æ
Items 1, 3 and 4 in Fig. 16)
Text Code Cause Remedy (by contractor)