Troubleshooting Diagnosis - Viessmann VITOCROSSAL 200 Service Instructions Manual

Troubleshooting
Diagnosis
Faults with indication on the display and programming unit
(fault codes)
Message codes
Message System character-
code istics
A Burner OFF
A Burner OFF
C Burner OFF
New parameter
memory stick
F Burner is in a fault
state
F2 (flash- Burner OFF
ing)
General process error
Fault code System character-
istics
F AA Fan pressure is pro-
duced during the air
pressure switch idle
state check
F AA The air pressure
switch contact is not
in the idle state
F AB Air pressure switch
shows no air pres-
sure, fan does not
operate
F AB Air pressure switch
shuts down during
operation
40
Cause Measures
Gas pressure lim- Check the gas pressure
iter fault limiter
Lack of gas Notify your gas supply
company
Data transfer from Enter password (hexa-
the new para- decimal number be-
meter memory tween 0 and 255 or 00
stick with a pass- and FF)
word
See fault code See fault code steps
Connected dis- Use current display
play is invalid
Cause Measures
Wind influence on Check the flue gas
fan draught (chimney)
Air pressure Replace the air pressure
switch faulty switch
Air pressure Replace air pressure
switch is faulty, switch, connect or set
connected or set correctly
incorrectly
Flue gas back Remove flue gas back
pressure, con- pressure, check for con-
densate banked densate banked up, and
up reset the burner control
unit