Check The Fuse On The Rear Of The Uba 3; See; Is The Fuse Okay; Replace The Fuse - Buderus Logamax plus GB142-24 Servicing Instructions

7 Diagnosis
No display, part 2
page 28
7
Disconnect the following boiler components
from the electrical power supply:
- the blower, see page 86,
- the primary circulation pump,
see page 126.

Check the fuse on the rear of the UBA 3

again using a volt-ohm-multimeter.
See page 84.

Is the fuse okay?

Turn the operating switch on the BC10 to
position "1" (ON). See page 9, par. 4.2.
Is there any indication on the

BC10 display?

Turn the operating switch
to "0" (OFF).
Connect the external primary
circulation pump.
Turn the operating switch on the BC 10 to
position "1" (ON). See page 9, par. 4.2.
Is there any indication on the
BC10 display?
10
page 31
30 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
No
Yes
No
Yes
No
Yes
Replace the fuse again.
See page 84.
9
page 32
Replace the external primary
circulation pump.
Replace the fuse again.
See page 84.