Buderus Logamax plus GB142-24 Servicing Instructions page 52

7 Diagnosis
Operating code 2P
Temperature increase of supply sensor or safety
2 P 2 1 2
sensor is more than 7.5 °F/sec (5 K/sec).
Wait approx. 30 seconds until the boiler
automatically becomes operational again.
fault message
Are all servicing cocks
open?
Is the pressure
in the heating system (measured on
the boiler) at least
14.5 psi (1 bar)?
Is at least
one thermostatic valve open?
Check the supply and safety sensors
(page 89).
Are the supply and safety
sensors okay?
Check the primary
circulation pump.
Is the primary circulation
pump okay?
44
page 83
52 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
No
2 P
?
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Operating code
Open the servicing cocks.
Fill and bleed the heating system.
Open a thermostatic valve.
Replace the supply and/or safety sensors
(page 91).
Replace the primary
circulation pump.
8
page 31