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TROUBLESHOOTING
(c) By touching the - side of the tester to the N terminal
of transistor module and the + side of tester to U, V
and W of transistor module, measure the resistance.
If all the resistances are from 1 to 5 kΩ, it is normal.
(d) By touching the + side of the tester to the N terminal
of transistor module and the - side of tester to U, V
and W of transistor module, measure the resistance.
If all the resistances are greater than 100 kΩ, it is
normal.
[Case 2 and 3]
If items (a) to (d) are performed and the results are satisfactory, the diode module is normal.
Measure it under 1 kΩ range of a tester. Do not use a digital tester.
(a) By touching the + side of the tester to the + terminal
of the diode module and the - side of tester to the
~ terminals (3 NOs.) of the diode module, measure
the resistance. If all the resistances are from 5 to
50 kΩ, it is normal.
(b) By touching the - side of the tester to the + terminal
of the diode module and the + side of tester to the
~ terminals (3 Nos.) of the diode module, measure
the resistance. If all the resistances are greater than
500 kΩ, it is normal.
(3) Checking Procedures on Diode Module (In Case of 5 to 20HP)
Outer Appearance and Internal Circuit of Diode Module
[Case 1]
+
+
P
B
N
U
V
W
P
B
N
U
V
W
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