Series: Pro Training – Troubleshooting An Inverter Driven Compressor

Pro Training Blog Series

Robert Frost once famously fretted over which two diverging roads in the woods to take. He presented the case of a traveler that has come to a crucial decision that must be made. The same theme often rings true in HVAC diagnosis. The technician finds themselves at a diagnostic crossroads, if you will, and a choice must be made: 

  • The variable-speed blower motor will not run. Is it the board or is it the motor/module? 
  • My inverter system is throwing an error code. The service manual says it could be the compressor or the board. 
  • My HVAC system will not communicate. Is it the indoor control board, the outdoor control board, or the wiring? 

Today I am going to review troubleshooting an inverter compressor and the control that drives it. Often in analyzing service manuals you find flow charts that look like this: 

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Series: Pro Training – Non Disposable A/C Units

Pro Training Blog Series

I don’t know about you, but I can say comfortably that I do not find myself in the position of having thousands of dollars I want to dispose of. If you find yourself in a different position, please contact me and I will be happy to help you relieve yourself of those burdensome funds. I am using that statement because I know we can all never agree on the exact “average” cost of a Ductless AC installation, but I feel confident we can all agree that the number is over $1000. My point being that the price point means I am not interested in just “throwing it away” at the first sign of trouble. These machines or appliances are not disposable. They can be maintained, and they can be repaired. However, both of those concepts must begin with us doing something that many of us feel uncomfortable with … opening the machine up. 

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Series: Pro Training – Ductless Drain Safety Installation

Pro Training Blog Series

The United States market has come a long way on embracing ductless HVAC units. From 20 years ago when you would occasionally see a unit installed on a sunroom to present day when this technology is regularly used to combat discomfort in bonus rooms, additions, garages, and even whole home applications. Along the way code has had to change in order to adapt to the more widely used ductless technology. One of these areas of adaption is in the protection of a wall mounted indoor unit from condensation overflow. Unlike traditional installations where auxiliary drain pans are widely used, the standard wall mounted indoor unit only has the internal drain pan. This design leaves open the possibility of wall and/or flooring damage should the drain line become obstructed.

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