1-114
TROUBLESHOOTING
(c) 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.
(d) 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.
Remove all the terminals of the ISPM before check.
If items (a) to (h) are performed and the results are
satisfactory, ISPM 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 P1 terminal
of ISPM and the - side of tester to R, S and T of
ISPM, measure the resistance. If all the resistances
are more than 100 kΩ, it is normal.
(b) By touching the - side of the tester to the P1 terminal
of ISPM and the + side of tester to R, S and T of
ISPM, measure the resistance. If all the resistances
are more than 1 kΩ, it is normal.
(4) Checking Procedures ISPM (In Case of 24 and 30HP)
Internal Circuit of ISPM
R
S
T
P1
N
TB3
+
-
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
P1
R, S, T
TB3
+
-
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
P1
R, S, T
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