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6 720 645 349 (2010/09)
Troubleshooting | 59
Information displayed
(Æ items 1, 3 and 4 in Fig. 25)
Text Code Cause Remedy (by contractor)
Fault 01
BUS communication fault
10 BUS subscriber FB 100
assigned to IPM no longer
responds.
Check BUS subscriber, BUS
connection and repair circuit
break if necessary.
200 Heating appliance no longer
reporting.
201 Incorrect BUS subscriber
connected.
Identify and replace incorrect
BUS subscriber.
Fault 02
Internal fault
40 Incorrect BUS subscriber
connected.
Identify and replace incorrect
BUS subscriber.
41 Two identical codes entered at
IPM.
Switch system off and correct
coding.
42 DIP switch on IPM in
intermediate position.
50 Thermal disinfection via IPM
failed.
Turn flow temperature
controller on heating appliance
fully clockwise.
100 ISM not responding. Check BUS connection and
repair circuit break if
necessary.
254 Fault message overflow.
Fault 02
Internal fault
Some parameters reset to factory settings
due to EEPROM problem
205 See display text.
1)
Check parameter settings and
readjust as necessary. Identify
and replace faulty controller/
remote control.
Fault 02
Internal fault
FW100/FB100 can no longer control CH
system
255 See display text.
1)
Identify and replace faulty
controller/remote control.
Fault 03
Room temp sensor faulty
20 Room temperature sensor built
into FW 100/FB 100/FB 10 has
suffered a break.
Identify and replace faulty
controller or remote control.
21 Short circuit on room
temperature sensor built into
FW 100/FB 100/FB 10.
Fault 10
System configuration: invalid Remote
control detected or set for non-existent
heating circuit. Check identification.
195 See display text.
1)
Check system layout, check
system configuration, and
modify if necessary.
1) The display text is shown at the BUS subscriber (e.g. remote control) that has identified the fault. The other BUS
subscribers will instead display the code that corresponds to the display text.
59


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