When dealing with HVAC systems, notice that there are two systems at work, and two possibilities for failure: the HVAC control system, and the actual HVAC unit. Determine if your problem is in the function of the controller (blank screen, not turning on, relay does not click on when fan or thermostat is set past current temperature), or in the HVAC unit (thermostat relay is clicking but HVAC fan does not turn on, condenser outside fan is not spinning, etc.) If the air conditioner was 'grounded', as I understand it, I would think your HVAC breaker would trip. This should help you figure out your problem.
12 kw
a centrifigal air conditioner
400 watts
You need to first know the wattage of the motor and locked rotor current can be tested at a lab only
You probably should investigate that. Nobody here can help you.
the Sunpentown WA-6591S Window Air Conditioner with remote has thermostat.
thermostat could be bad, or location of it, air flow over it.
The air conditioner or heater continually runs.
Yes
It could be you have a stuck fan relay, a contactor that is sticking, or your thermostat is bad.
If your air conditioner is set to cool and it is heating you have a broken thermostat.
System could have a humidistat installed...
Drop the temp on the thermostat.
The furnace or air handling unit in the house.
No. If your referring to the fan on switch on the thermostat. The answer is no only the indoor fan runs if the thermostat is properly wired.
Most likely it is a bad thermostat. The switch on the radiator fan could also have failed.
If central air conditioner turns on but is not blowing through the vents, check the filter. If it is dirty, change it. Change the thermostat into cool, this will defrost the air conditioner.