Midea MCH2U-18PHH2, Service Manual

Page: 96 / 131

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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
Normal resistance
value
Digital tester
Normal
resistance
value
(+)Red (-)Black
∞
(Several MΩ)
(+)Red (-)Black
∞
(Several MΩ)
P
N U
N
U V
V W
W (+)Red
4. AC Fan Motor.
Measure the resistance value of each winding by using the tester.
Position Resistance Value
RPG20B RPG28H
Black - Red
381Ω±8% (20
℃
)
(Brand: Weiling)
342Ω±8% (20
℃
)
(Brand: Dayang)
183.6Ω±8% (20
℃
)
(Brand: Weiling)
180Ω±8% (20
℃
)
(Brand: Wolong)
White - Black
267Ω±8% (20
℃
)
(Brand: Weiling)
253Ω±8% (20
℃
)
(Brand: Dayang)
206Ω±8% (20
℃
)
(Brand: Weiling)
190Ω±8% (20
℃
)
(Brand: Wolong)
Measure the resistance value of each winding by using the tester.