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Troubleshooting | 87US/CA
Display (Æ Item 1, 3 and 4 in fig. 29)
Text Code Cause Remedy (by installer)
Fault 01
BUS communication fault.
10 BUS device assigned to the
IPM FB 100 no longer answers.
Check BUS device, BUS
connection and repair circuit
break if necessary.
200 Boiler no longer reporting.
201 Incorrect BUS device
connected.
Identify and replace incorrect
BUS device.
Fault 02
Internal fault
40 Incorrect BUS device
connected.
Identify and replace incorrect
BUS device.
41 Two identical IDs set on IPM. Switch system off and correct
ID.
42 Code switch on IPM in
intermediate position.
50 Thermal disinfection via IPM
failed.
Turn the supply temperature
control on the boiler clockwise
as far as it will go.
100 ISM not responding. Check BUS connection and
repair circuit break if
necessary.
254 Overflow of fault messages.
Fault 02
Internal fault
Some parameters reset to factory settings
due to EEPROM fault!
205 See display text
1)
Check parameter settings and
readjust them as necessary.
Identify defective controls and
replace.
Fault 02
Internal fault
FW200/FB100 can no longer control
heating system.
255 See display text
1)
Identify defective controls and
replace.
Fault 03
Room temp sensor defective
20 There is a circuit break on the
room temperature sensor built
into the FW 200/FB 100.
Identify defective controls or
remote control and replace.
21 There is a short circuit on the
room temperature sensor built
into the FW 200/FB 100.
Fault 10
System configuration: invalid
Remote control detected or set for non-
existent heating circuit. Check ID.
194
195
See display text
1)
Check system layout, check
system configuration, modify if
necessary.
Fault 10
System configuration: invalid
Only one unmixed heating circuit permitted
in FW200 system.
196
197
198
199
1) The display text is shown on the BUS device (e.g. remote control) that detected the fault. On the other BUS
devices, instead of this, the code is displayed and corresponds to the display test.
87


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