High Discharge Pressure or Compressor Overload Fault

What does High Discharge Pressure or Compressor Overload Fault mean?

This fault indicates that the discharge pressure in the system is too high, or a compressor has tripped due to overload.

• Compressor internal motor protector open
• External overload tripped
• Defective high pressure cutout switch
• Defective CR relay
• Low refrigerant charge
• Incorrect superheat setting
• Compressor is overloaded

Click steps to track your progress.

1. 1

   Verify refrigerant charge is not low.

2. 2

   Check and adjust superheat setting (3-5°C recommended).

3. 3

   Verify correct compressor rotation.

4. 4

   Ensure the compressor is not overloaded.

5. 5

   Determine cause and reset external overload if tripped.

6. 6

   Replace defective high pressure cutout switch or CR relay if necessary.