Carrier 42QHF009DS Service Manual page 78

Dc inverter multi type
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3. IPM continuity check
Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital
tester to measure the resistance between P and UVWN; UVW and N.
Digital tester
(+)Red
(-)Black
N
U
P
V
W
Normal resistance value
(Several MΩ)
78 / 78
Digital tester
Normal resistance value
(+)Red
(-)Black
U
V
N
W
(+)Red
(Several MΩ)

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