Service Manual

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% (68ºF)
(Brand: Weiling)
342Ω±8% (68ºF)
(Brand: Dayang)
183.6Ω±8% (68ºF)
(Brand: Weiling)
180Ω±8% (68ºF)
(Brand: Wolong)
White - Black
267Ω±8% (68ºF)
(Brand: Weiling)
253Ω±8% (68ºF)
(Brand: Dayang)
206Ω±8% (68ºF)
(Brand: Weiling)
190Ω±8% (68ºF)
(Brand: Wolong)
Measure the resistance value of each winding by using the tester.