Hitachi Set Free mini-HNRQ1 Series, Service Manual

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Checking Method for Inverter Module
Rectifier and Inverter Circuit of Inverter Module. Remove all the terminals of the inverter module before check
If all the items (below table) are performed and all items are satisfied, the inverter modu le is non-defective.
Test Point
Analog Tester Result
Digital Tester Result
+ side of tester -Side of tester
AC-L1/AC-N L-COM More than 1k Ohm 0.5V or smaller
AC-L1/AC-N N More than 100k Ohm Overload
L-COM AC-L1/AC-N More than 100k Ohm Overload
N AC-L1/AC-N More than 1k Ohm 0.5V or smaller
U/V/W P More than 1k Ohm 0.5V or smaller
U/V/W N More than 100k Ohm Overload
P U/V/W More than 100k Ohm Overload
N U/V/W More than 1k Ohm 0.5V or smaller
● APFC Circuit of Inverter Module
If all the items (below table) are performed and all items are satisfied, the inverter m odule is non-defective.
Test Point
Analog Tester Result
Digital Tester Result
+ side of tester -Side of tester
L1/L2 P More than 1k Ohm 0.5V or smaller
P L1/L2 More than 100k Ohm Over Load
L1/L2 N More than 5M Ohm Over Load
N L1/L2 More than 0.5M Ohm Over Load
TROUBLESHOOTING