Buderus 800 - Servicing; 5.1 Operating codes

Servicing 5
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
39
5 Servicing
5.1 Operating codes
NOTE
If the code displayed on the burner-control
unit is not listed under the operating codes
or fault warnings, the burner-control unit
itself is malfunctioning.
Display
Display after
pressing the ser-
vice button
Meaning
0
800 Series is ready for operation
A
Burner interval circuit, 10 minutes from start of burner
C
Waiting for the three-way valve and/or pump to switch
H
Ready for operation
L
First safety period
P; U
Safety period
Y
Flow water temperature setting reached (switching difference +2 K)
-.
800 Series runs in heating mode
A
Chimney sweep mode
H
Normal heating mode
Y
Service mode
=.
800 Series runs in hot water mode
H
Normal hot water mode
r
Reset (after reset button has been pressed for 5 sec. UBA is reset to the switch-on
condition)