Buderus Logamax plus GB142-24 Servicing Instructions page 32

7 Diagnosis
No display, part 4No display, part 5
Use a volt-ohm-multimeter to check the
supply wires of the primary circulation pump,
the blower and the hot surface ignitor for signs
See page 87 and page 93.
Are the wires okay?
Use a volt-ohm-multimeter to measure
contacts L and N of the transformer for
Is the resistance approx. 50 Ohms?
Measure the supply cord of the transformer to
make sure it is not broken or shorted.
Is the supply cord okay?
Replace the supply cord of the transformer
and replace the fuse again.
32 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
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9
of short circuiting.
Yes
resistance.
Yes
No
See page 84.
Replace the cable loom or the affected part
thereof and the fuse again.
No
See page 84.
Replace the transformer,
see page 109.
No
And replace the fuse again.
See page 84.
Yes
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