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
400 watts
a centrifigal air conditioner
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.
A thermostat controls the temperature of an air conditioner by sensing the current temperature in a room and comparing it to the desired temperature set by the user. When the room temperature is higher than the desired temperature, the thermostat signals the air conditioner to turn on and cool the room. Once the room reaches the desired temperature, the thermostat signals the air conditioner to turn off.
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.
An air conditioner can freeze due to low refrigerant levels, restricted airflow, or a malfunctioning thermostat.
The furnace or air handling unit in the house.
An air conditioner can freeze up due to low refrigerant levels, restricted airflow, or a malfunctioning thermostat.