Bosch Worcester FW 100 Installation & User's Instructions page 67

Information displayed (
Text
Fault 02
Internal fault
Some parameters reset to factory settings
due to EEPROM problem
Fault 02
Internal fault
FW 100 can no longer control the heating
system!
Fault 03
Room temp sensor faulty
Fault 11
System configuration: new BUS device
New ISM detected. Power up all ISMs simul-
taneously and start automatic system con-
figuration.
Fault 12
System configuration: BUS device missing
ISM1 not detected. Check connection.
Fault 13
System configuration: BUS device changed
or replaced
Check system configuration for DHW or
start automatic system configuration.
Fault 13
System configuration: BUS device changed
or replaced
Check system configuration for heating cir-
cuit!
Fault 15
Outside temperature sensor not connected
Outside temperature is not available.
Fault 19
Unable to save parameter settings
Fault 20
System configuration: invalid
Fault 27
FW100 not found!
Tab. 23
Pos. 1, 3 and 4 in fig. 26)
Code
205
255
20
21
131
132
170
171
157
158
159
30
202
193
191
6 720 617 763 (2008/09)
Cause
Some parameters reset to
default.
FW 100 can no longer control
the heating system.
There is a circuit break on the
room temperature sensor built
into the FW 100.
There is a short circuit on the
room temperature sensor built
into the FW 100.
New ISM detected.
HLC has tripped or is faulty.
ISM1 no longer detected
despite having been config-
ured.
BUS device changed or
replaced.
Outside temperature sensor
not recognised.
BUS device is configured but
not available at present.
Invalid coding in remote con-
trol for the heating circuit.
Remote control cannot detect
heating controller FW 100.
Troubleshooting
Remedy (by installer)
Check parameter settings
and readjust them as neces-
sary. Replace faulty control-
ler.
Replace faulty controller.
Replace faulty controller.
Power up all ISMs simultane-
ously and start automatic
system configuration.
Check HLC.
Check solar parameter T2
( Section 6.5, page 47).
Is thermal disinfection
active?
Check connection.
Check system configuration
for domestic hot water sys-
tem or start automatic sys-
tem configuration.
Check system configuration
for heating circuit
Check outside temperature
sensor and remedy interrup-
tion, if necessary.
Check system layout, check
system configuration, modify
if necessary and set parame-
ter again.
In combination with FW 100
only coding 1 is possible in
the remote control.
Check Bus connection.
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