Troubleshooting Fault Display; Fault Codes - Viessmann Vitodens 242-F Installation And Service Instructions Manual

Fault display
In the event of a fault, red fault indicator
" " flashes on the display and "Fault" is shown.
A
R
bar
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.

Fault codes

Fault code dis- System characteristics
played
0F Control mode
10 Regulates as if the outside
temperature were 0 °C
18 Regulates as if the outside
temperature were 0 °C
19 Regulates as if the outside
temperature were 0 °C
Calling up acknowledged faults
A flashes.
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
2. "Fault history"
3. "Display?"
Deleting fault history
Service menu:
1. Press OK and
2. "Fault history"
3. "Delete?"
Cause
Service
"0F" is only displayed in
the fault history
Short circuit, outside tem-
perature sensor
Lead break, outside tem-
perature sensor
Communication error,
wireless outside tempera-
ture sensor
Troubleshooting
simultaneously for approx. 4 s.
å
simultaneously for approx. 4 s.
å
Measures
Service required
Note
After servicing, set code "24:0".
Check outside temperature sensor
(see page 101)
Check outside temperature sensor
(see page 101)
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).
93