Been working trying to resolve an issue with the Vintage A/C unit is not working. The A/C clutch is not engaging and the Infinity Rear power cell light number 10 is not appearing when power is supplied. I have checked for the Inverter in the wiring for the fans control and it is there. I tried to taking the triary switch out the equation by jumping the a/c control circuit from the Infinity system and A/C thermostat switch. We are getting normal voltage input side of the inverter and we get 4.87V (off) or 8.5V (on) at the output going to Master-cell. Any ideas?