Buderus 600 - 11S Installation And Servicing Instructions page 43

Servicing
Code Meaning
8Y
Gas fault
Possible
cause
1 External switching contact (e.g. temperature-
monitoring device for underfloor heating has been
tripped or gas pressure too low
Code Meaning
9A
System error
Possible
cause
1 Regulating device may have to cope with interference
2 UBA may be defective
Code Meaning
9C
KIM error
Possible
cause
1 KIM connected incorrectly or KIM defective
Code Meaning
9F/H
System error
Possible
cause
1 Regulating device may have to cope with interference
2 UBA may be defective
Code Meaning
9L
Gas valve assembly error
Possible
cause
1 Wiring to the gas valve incorrect, or loose wiring
connections in UBA
2 UBA may be defective
3 Peaks in the electrical network
Subject to modifications resulting from technical improvements!
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004
Action
Check gas pressure detector is defective or the wires have
not been properly connected to the back of the UBA (see
subsection 5.3.6)
Action
– 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
– Check for dripping hot water taps on the combination
boiler only
Press reset. If fault code remains then try to temporarily
connect a different UBA
Action
Check the KIM connector and fan connector.
If the connectors are fine then contact Boulter Buderus
Action
– 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
Press reset. If fault code remains then try to temporarily
connect a different UBA (see subsection 5.3.3)
Action
– Check the electrical connections of the gas valve.
– Measure the resistance of the gas valve (18-55 Ohm)
– Check if for example induction fields interfere with the
regulating device
– Press reset. If fault code remains then try to temporarily
connect a different UBA (see subsection 5.3.3)
– Check if the are any peaks in the electrical network
caused by maybe windmills or a power generator
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
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