Troubleshooting
3
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
12
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
Fig. 9
Fault warning message 3C: Bad plug-in connection at cable loom, or damaged wiring
Remove the casing (page 48)
No
No
Yes
"reset"
Replace cable
Use the corresponding flow diagram
to diagnose and deal with the fault.
Wiring OK?
"reset"
Flashing
Bad plug-in connection at cable loom,
or damaged wiring
C
3
New fault warning
message?
Fit the casing (page 48)
600 Series 11S / 19S / 24S / 24C
OK
Check for a damaged or broken
connection lead between plugs
03-20 and 04-20 of the 20-core
lead to the UBA
No
Yes
New fault warning
message
3C
?
Yes
