Buderus Logamax plus GB142-24 Servicing Instructions page 53

Operating code 2U
The temperature difference between the supply
2 U 2 1 3
and return sensors is more than 90 °F (50 K).
Wait approx. 30 seconds until the boiler
automatically becomes operational again.
fault message
Are all servicing cocks
open?
Is at least
one thermostatic valve open?
Check the supply and return sensors
(page 89).
Are the supply and return
sensors okay?
Check the primary
circulation pump.
Is the primary circulation
pump okay?
44
page 83
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
No
2 U
?
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Operating code
Open the servicing cocks.
Open a thermostatic valve.
Replace the supply and return sensors
(page 91).
Replace the primary
circulation pump.
Diagnosis
8
page 31
7
53