TOP 600 XTPRO: Service & Maintenance Manual - rev. 2.0
6.2. THERE IS NO RESISTANCE
This error can be caused by absence of the speed signal, problems with the excitation circuit,
overheating of the alternator or defective alternator brushes.
THERE IS NO
RESISTANCE
Are the Watt and RPM
values shown on the display
different from zero?
NO
YES
1
Execute the procedure
"The RPM valuel is
incorrect"
Is the alternator excitation
circuit ok?
Execute the procedure
"The resistance is
incorrect"
YES
Is the alternator
overheated?
NO
Allow it to cool down and
then try again. The
thermal cutout is probably
tripped.
YES
Replace the brushes
NO
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
(1)
Disconnect the orange cable (excitation) from the alternator. Place the tester probes between
the point where it was connected and the black cable. The measured resistance should be
approximately 4 Ohm.
Page 6.5
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