Hitachi Summit RAC-18YH6, Руководство по обслуживанию, Страница: 89 / 96

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P U V W U
P N
V W N
Diagnosis procedure for power module using multimeter
[Inverter section]
Set the multimeter to resistance range of
100. If 100 is not provided, measure with the range of
x
1 to 100.
If the pointer does not swing when the following continuity check is performed, it is normal.
(When a digital multimeter is used, + and - terminals will be reversed, since the orientation of built-in
battery is inverted.)
Note:
If internal circuit of power module is disconnected (open) and pointer of the mutimeter does not swing,
it may be assumed to be normal. If the pointer swings when + and - terminals are connected in
reverse, it is normal. Compare swing statuses for U, V and W phases: If the statuses at all 3 points are
the same, it is normal.
x x
x
RAS_AW_083-092e 2008.03.06, 21:04 87