Buderus Logamax plus GB142-24 Servicing Instructions page 40

7 Diagnosis
Repl. CC
page 39
16
Check the gas/air ratio.
See page 108.
Is the gas/air ratio
okay?
Check the hot water tank
for scale build-up.
Is the hot water tank
scaled up?
Check to see if any other external part
of the heating circuit is a possible cause of
the fault.
Are such items detected?
44
page 83
40 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
No
Yes
Yes
No
Yes
No
Adjust the gas/air ratio.
See page 108.
Decalcify the tank.
Place the affected components out of service.
8
page 31