93
In the event of a fault, red fault indicator
A
flashes.
" "
flashes on the display and
"Fault"
is shown.
R
bar
A
Fig. 63
The fault code is displayed with
OK
.
For some faults, the type of fault is also displayed in
plain text.
For an explanation of the fault code, see the following
pages.
Acknowledging a fault
Follow the instructions on the display.
Note
■
The fault message is transferred to the standard
menu.
■
A fault message facility, if connected, will be
switched off.
■
If an acknowledged fault is not remedied, the fault
message will be re-displayed the following day and
the fault message facility restarted.
Calling up acknowledged faults
Select
"Fault"
in the standard menu. The current
faults will be displayed in a list.
Calling up fault codes from the fault memory (fault
history)
The 10 most recent faults (including resolved ones)
are saved and can be scanned.
Faults are sorted by date.
Service menu:
1. Press
OK
and
å
simultaneously for approx. 4 s.
2.
"Fault history"
3.
"Display?"
Deleting fault history
Service menu:
1. Press
OK
and
å
simultaneously for approx. 4 s.
2.
"Fault history"
3.
"Delete?"
Fault codes
Fault code dis-
played
System characteristics
Cause
Measures
0F
Control mode
Service
"0F" is only displayed in
the fault history
Service required
Note
After servicing, set code "24:0".
10
Regulates as if the outside
temperature were 0 °C
Short circuit, outside tem-
perature sensor
Check outside temperature sensor
(see page 101)
18
Regulates as if the outside
temperature were 0 °C
Lead break, outside tem-
perature sensor
Check outside temperature sensor
(see page 101)
19
Regulates as if the outside
temperature were 0 °C
Communication error,
wireless outside tempera-
ture sensor
Check wireless connection (place
wireless outside temperature sen-
sor close to the wireless base sta-
tion). Log off outside temperature
sensor, then log on again. Replace
if required (see "Wireless base sta-
tion" installation and service in-
structions).
Troubleshooting
Fault display
5773 238 GB
Diagnosis
