Boulter Buderus Benchmark 600 Series, Installation And Servicing Instruction

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Servicing 5
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004 43
Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-boilers.com
Code Meaning
6L
Blinking fault code : Flame goes out during operation
Possible
cause Action
1 Gas/air ratio not in order Check and adjust the gas/air ratio (see subsection 2.1.8)
2 Wrong gas supply pressure Check the gas-supply pressure (see subsection 2.1.7)
3 Earthing cable may be faulty Check the earthing cable connections (yellow/green wire)
4
Ionisation electrode may be faulty
Check the cabling on the ionisation electrode, check the
ionisation electrode and replace when necessary
(see subsection 2.1.11 and subsection 5.3.13).
5 Recirculation of flue gas Check the flue gas system
6
Gas valve shuts down during operation
Check connections and wiring of the gas valve and replace
when necessary
Code Meaning
6P
Blinking fault code : Glow ignitor has been on too long
Possible
cause Action
1 Try to reset the boiler by pressing the reset button for
2 seconds
2
KIM may be defect
Check if UBA 3 is fitted tightly onto the boiler
(see subsection 5.3.2).
If this is the case then contact the Boulter Buderus service
department.
Code Meaning
7C Blinking fault code : Mains supply interrupted
Possible
cause Action
1 A problem with the mains supply Carry out a power test procedure for safe testing of the
mains electrical supply
2 Reset button pressed too briefly Press the Reset button for two seconds
Code Meaning
7L Blinking fault code : Internal UBA error
Possible
cause Action
1 Bad UBA connection Check UBA connector
UBA may be defective Replace UBA (see subsection 5.3.2)
KIM may be defective Call the service department of Boulter Buderus
Code Meaning
8Y Blinking fault code : External switch contact is open
Possible
cause Action
1 External switch contact (e.g. temperature-monitoring
device for underfloor heating has been tripped or gas
pressure too low – Check wiring and connections of the external switch
contact
– Check the external switch contact