Servicing
5
44
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
Code
Meaning
9U
KIM defective
Possible
cause
Action
1
KIM connected incorrectly or KIM defective
Check the KIM connector and fan connector.
If the connectors are fine then contact Buderus
Code
Meaning
E
with
any
character
but
P
UBA defective
Possible
cause
Action
1
Regulating device may have to cope with interference
– Check if for example induction fields interfere with the
regulating device
– Check if the are any peaks in the electrical network
caused by maybe windmills or a power generator
2
UBA may be defective
– Press reset. If fault code remains then try to temporarily
connect a different UBA (see subsection 5.3.3)
Code
Meaning
EP
Non compatible UBA fitted
Possible
cause
Action
1
Regulating device may have to cope with interference
– Check if for example induction fields interfere with the
regulating device
– Check if the are any peaks in the electrical network
caused by maybe windmills or a power generator
2
KIM connected incorrectly or KIM defective
– Check the KIM connector and fan connector. If the
connectors are fine then contact Buderus
Problem
:
No DHW, despite the system being operational
– Set chimney sweep switch to "0"
– Check three-way valve replace if necessary
– Check DHW sensor and replace if necessary
Problem
:
No heating, despite that there is a demand for heat and the boiler is operational
– Check regulating device configuration and/ or the wiring
– Check the wiring between the regulating device and the UBA (see subsection 5.3.6)
– Check all the wiring
– Check the UBA and replace if necessary (see subsection 5.3.3)