Fault Codes - Viessmann Vitocrossal 200 Service Instructions For Contractors

Troubleshooting
Fault display
6. / to scroll through the fault
codes.
To clear the fault memory from the oper-
ating display, press the following keys:
1. S longer than 2 s, " " flashes.
2. until "4" is shown under Service.
3. S "4" will be displayed under Sta-
tus.

Fault codes

General process errors
Fault display on the display and programming unit on the burner.
Note
Carry out measures in the described order.
All fault codes are saved to the fault memory and the last 10 can be called up.
Displayed System characteris-
fault code tics
F 80 Burner control unit in
a fault state; system
cools down; burner
control unit locked
out
F 81 Burner control unit in
a fault state
F 82 Burner control unit in
a fault state; system
cools down; burner
control unit locked
out
48
(cont.)
4. until "3" is shown under Service.
5. S "1" is shown under Status and
"dEL" under Service.
6. S to confirm the deletion. If deleted
successfully, "1" will be shown
under Service; if it failed, "0" will
appear.
7. S to change to the operating dis-
play.
Cause
Short circuit, boiler
water temperature
sensor, burner
control unit
Sensor drift, boiler
water temperature
sensor, burner
control unit
Short circuit, flue
gas temperature
sensor (A or B),
burner control unit
Measures
Check lead and dual sen-
sor; replace sensor if re-
quired
Check lead and dual sen-
sor; replace sensor if re-
quired
Check lead and sensors
(A and B), replace sensor
if required