04-27-2013, 05:25 AM
Chester,
Nameplate data, documentation, and current measurements all show that the current draw for an A/C compressor is greater than 10 amps. So, 10 amp breakers would not support the load and would just trip. I'm not sure what is going on, but I will wager the breakers are rated above 10 amps. You also said the condenser fan was not running at high speed. Does this imply it is running at low speed and you are not convinced it is switching to high speed on stage two cooling? If that is the case, then the starting capacitors are not an issue, although changing them out for new is both easy and inexpensive. The difference between low and high speed on the fan is mostly easily observed by opening the bay door and running the unit in stage one cooling. Do that by making the thermostat setpoint only 1 degree above actual temperature. Then, move the T/S setpoint several degrees above actual and you have 3 minutes to get in position at the unit to hear the change in fan speed. You should hear the second compressor come on as well. I found the change in fan speed to be smaller than one might imagine. The fan current changed only about one amp as I recall.
You didn't mention it, but do the breakers ever trip? If the breakers don't trip and the fans run at all I would lean toward circuit board relay problems or connector problems. As you gather more information I hope we can be more helpful. Russ
Nameplate data, documentation, and current measurements all show that the current draw for an A/C compressor is greater than 10 amps. So, 10 amp breakers would not support the load and would just trip. I'm not sure what is going on, but I will wager the breakers are rated above 10 amps. You also said the condenser fan was not running at high speed. Does this imply it is running at low speed and you are not convinced it is switching to high speed on stage two cooling? If that is the case, then the starting capacitors are not an issue, although changing them out for new is both easy and inexpensive. The difference between low and high speed on the fan is mostly easily observed by opening the bay door and running the unit in stage one cooling. Do that by making the thermostat setpoint only 1 degree above actual temperature. Then, move the T/S setpoint several degrees above actual and you have 3 minutes to get in position at the unit to hear the change in fan speed. You should hear the second compressor come on as well. I found the change in fan speed to be smaller than one might imagine. The fan current changed only about one amp as I recall.
You didn't mention it, but do the breakers ever trip? If the breakers don't trip and the fans run at all I would lean toward circuit board relay problems or connector problems. As you gather more information I hope we can be more helpful. Russ
Russ White
2016 Winnebago Vista LX 30T
#530 ( Sold )
1999 45' Double Slide - Factory upgrade 2004