Buderus Logamax plus GB142-24 Servicing Instructions page 51

Locking boiler fault code 2L TT
page 50
22
Check the primary circulation pump for
soiling.
Is the primary circulation pump
soiled?
Is the expansion
tank correctly connected to
the supply conduit?
Check whether the pressure sensor is soiled.
See page 116.
Is the pressure sensor
soiled?
Replace the pressure sensor.
See page 116.
Has the malfunction been
repaired?
44
page 83
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
Yes
No
Yes
No
Yes
No
Yes
No
Clean the circulation pump (inside).
Connect the expansion tank to the return
conduit.
Clean the pressure sensor.
Diagnosis
8
page 31
7
51