Messages – Universal Automatic Burner (UBA)
1
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
7
Table 2
Displayed UBA fault warning messages
Display
Display after
pressing the
service button
Meaning
Trouble-
shooting
flow diagram
7
Mains voltage
A
Voltage in UBA too low or too high
C
Mains voltage interrupted following a fault warning message
F
F3 fuse defect, or UBA system error
H
Voltage peaks in UBA
L
UBA timer error
8
General fault/gas-pressure
y
External switching contact, e.g. temperature monitor for floor heating, has
been tripped
9
System error
A
System error
C
Incorrect cable connection at KIM, or KIM defective
F, H, P
System error (UBA defective)
L
Wiring to gas-burner assembly incorrect, or loose wiring connections
in UBA
U
KIM defective
E
UBA system fault
Any indication,
except
P
UBA system fault
P
Non-compatible UBA fitted