Buderus 11S, Servicing Manual

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Messages – Universal Automatic Burner (UBA) 1
Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk
6 Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
1.5 Fault messages
Display
Display after
pressing the
service button
Meaning
Trouble-
shooting
flow diagram
2
Water flow
C
Safety sensor exceeds 100 °C page 10
P
Excessive temperature increase at safety sensor page 11
3
Air volume flow
C
Bad plug-in connection at cable loom, or damaged wiring page 12
4
Temperatures
A
Feed sensor above 100 °C page 13
C
F2 fuse malfunction, or exhaust-gas sensor tripped
page 15
F
Safety sensor exceeds 100 °C page 17
H
Dripping tap page 18
L
Short circuit in safety sensor page 19
P
Safety sensor, loose contact or defective page 20
U
Short circuit in feed sensor page 21
y
Feed sensor, loose contact or defective page 22
5
Communication
C
600 series has switched off after disconnection of diagnosis plug
page 23
6
Flame monitoring
A
F1 fuse defective, or no ionisation message after ignition page 24
C
Ionisation message, but no flame page 28
H
Flame dies out after gas valve is opened page 29
L
Flame goes out during warm-up phase page 30