Heat Controller B-DVH09SD-0 Service Manual page 43

Heat Controller
10.3.7 Index: IPM continuity check
Turn off the power, let the electrolytic capacitors discharge completely, and dismount the IPM.
Use a digital tester to measure the resistance between P and U,V,W,N; U,V,W and N.
Digital tester
(+)Red
P
Note:
1) DVC09SD-0, DVH09SD-0, DVC12SD-0, DVH12SD-0 models:
Measure the black pin and red pin of the motor connector, the resistance should be around 50Ω at 20℃(68℉)
2) DVC18SD-1 and DVH24SD-1 models:
Measure the black pin and red pin of the motor connector, the resistance should be around 84.5Ω at 20℃(68℉)
3) DVC24SD-1 and DVH24SD-1 models:
Measure the black pin and red pin of the motor connector, the resistance should be around 88.5Ω at 20℃(68℉)
Normal resistance value
(-)Black
N
∞
U
(Several MΩ)
V
W
Digital tester
(+)Red (-)Black
U
V
N
W
(+)Red
43
DVC/DVH Inverter Mini-Split
Normal resistance value
∞
(Several MΩ)
P-U