Fault Codes - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Fault display
(cont.)
Calling up acknowledged faults
Press OK for approx. 4 s.
The 10 most recent faults (including resolved ones)
are saved and can be called up.
Calling up fault codes from the fault memory (fault
history)
The 10 most recent faults (including those remedied)
are saved and can be called up.
Faults are sorted by date.

Fault codes

Displayed Const.
fault code
10 X
18 X
19 X
1A X
1b X
1F X
20 X
Weather- System characteris-
comp. tics
X Regulates as if the
outside temperature
were 0 C
°
X Regulates as if the
outside temperature
were 0 C
°
X Regulates as if the
outside temperature
were 0 C
°
X Burner blocked
X Burner blocked
X Burner blocked
X Regulates without
flow temperature sen-
sor (low loss header)
1. Press OK and simultaneously for approx. 4 s.
å
2. Select " " and activate fault history with OK.
ã
3. Select fault messages with / .
Deleting fault history
While the list is displayed, press OK until
Confirm with OK.
Cause
Short circuit, out-
side temperature
sensor
Lead break, out-
side temperature
sensor
Communication in-
terruption, outside
temperature sen-
sor RF
(outside tempera-
ture sensor RF, KM
BUS to wireless
base station, wire-
less base station or
wireless repeater
faulty or defective)
Flow sensor 1, left
(plug 163) faulty
Flow sensor 2,
right (plug 163A)
faulty
Differential flow
rate too large
Short circuit, sys-
tem flow tempera-
ture sensor
Troubleshooting
flashes.
Measures
Check outside tempera-
ture sensor (see
page 91)
Check outside tempera-
ture sensor (see
page 91)
Check wireless connec-
tion (place outside tem-
perature sensor RF and
wireless repeater close to
the boiler).
Check KM BUS to wire-
less base station.
Log off outside tempera-
ture sensor and wireless
repeater, then log them
on again.
Wireless base sta-
tion
Replace outside tempera-
ture sensor RF.
Replace wireless repeat-
er.
Replace wireless base
station.
Replace sensor (see
page 93)
Replace sensor (see
page 93)
Clean heat exchanger by
flushing.
Check low loss header
sensor (see page 92)
83