Variable Speed Compressor Winding Resistance
This compressor operates with 3-phase variable frequency PWM
variable voltage. For troubleshooting fault codes related to compressor
resistances, follow these steps: 

1. Disconnect compressor power leads from the inverter MOC
terminals, U (YEL), V (RED), and W (BLK). 

2. Measure the resistance between YEL to RED, YEL to BLK, and RED to BLK and compare to Table 7 values. Each resistance set should be equal. 

3. Measure the resistance to ground for each lead. 

4. If the resistances check out, reconnect power leads to appropriate terminal. 

5. If the resistances appear to be abnormal, it will be necessary to measure the resistance at the compressor fusite terminals.

6. During the removal of the compressor fusite cap, do not remove the RTV sealant. Remove the harness plug, measure resistances, and compare to Table 7. 

7. Special care will need to be taken with the replacement of the compressor fusite cap. Make sure the two holes in the compressor fusite terminal box are still full of RTV sealant before the cap is reinstalled. The factory RTV can be reused as long as none of it has been removed during the cap removal. 

8. Reinstall compressor sound blanket making sure discharge thermistor and compressor power harness are routed as they were from the factory

Table 7 – Variable Speed Compressor Resistance

(winding resistance at 70°F? 20°F)*VH8 Models