Hitachi RAS-5HVRNM1E Service Manual page 322

8 Troubleshooting
2. Inverter module checking procedure
• Internal Circuit of Rectified Part of DIP-IPM
Non-faulty if [1] – [8] are checked and satisfied. (Measure with 1 kΩ range of a tester.)
N O T E
DO NOT use a digital tester
1. Touch [+] of the tester to DIP-IPM 52C terminal, and [-] to
DIP-IPM R, S terminals to measure the resistance. Normal if
all three terminals have 1 kΩ or greater.
2. Contrary to [1], touch [-] of the tester to DIP-IPM 52C
terminal, and [+] to DIP-IPM R, S terminals to measure the
resistance.
Normal if all three terminals have 100 kΩ or greater.
3. Touch [-] of the tester to [-] of DIP-IPM DMI (soldered part),
and [+] of the tester to DIP-IPM R, S terminals to measure the
resistance.
Normal if all three terminals have 1 kΩ or greater
4. Contrary to [3], touch [+] of the tester to [-] of DIP-IPM DMI,
and [-] of the tester to DIP-IPM R, S terminals to measure the
resistance.
Normal if all three terminals have 100 kΩ or greater
1. Tester.
2. Contact with specified terminals to measure.
• Internal Circuit of Rectified Part of Inverter Module (Cont.)
314
SMGB0060 rev. 1- 12/2010
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