Hitachi RAS-(4-6)HVRNS2E - Page 324

8 Troubleshooting
314
SMGB0064 rev.0 - 08/2011
2. Inverter module checking procedure
• Internal Circuit of Rectied Part of DIP-IPM
Non-faulty if [1] – [8] are checked and satised. (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 specied terminals to measure.
1
2
• Internal Circuit of Rectied Part of Inverter Module (Cont.)