Mars Comfort-Aire Century VCD-SA Series Service Manual page 157

Service Manual - VCDxxSA
Digital tester
(+)Red (-)Black
P
Note: The picture and the value are only for reference, actual condition and specific value may vary.
Normal voltage of P and N
In standby
In operation
With passive PFC module
>200VDC
Resistance value
N
∞
U
(Several MΩ)
V
W
208-240V(1-phase,3-phase)
around 310VDC
With partial active PFC
module
>310VDC

Digital tester
(+)Red
U
V
W
-
With fully active PFC
module
>370VDC
Troubleshooting 
Resistance value
(-)Black
∞
N
(Several MΩ)
380-415V(3-phase)
around 530VDC
/
>450VDC