9 Times 9 Times Continuous 99 4-Way valve error
4-Way Valve Error – When the indoor heat exchanger temperature is compared with the room temperature,
and either following condition is detected continuously two times, the compressor stops:
• Cooling or Dry operation [Indoor heat exchanger temp.] – [Room temp.] > 20°F (10°C)
• Heating operation [Indoor heat exchanger temp.] – [Room temp.] < -20°F (-10°C)
-Check connection of molex plug.
-Check each thermistor.
-Check the solenoid coil and 4-way valve.
-Check AC voltage of 4-way valve.
10 Times 1 Time Continuous A1 Discharge temperature error
Discharge Temperature Error - Protection stop by discharge temperature ≥230°F (110°C) during compressor
operation generated 2 times within 24 hours.
-Check if 3-way valve is open.
-Check EEV, strainer.
-Check outdoor unit fan, heat exchanger.
-Check discharge thermistor.
-Check refrigerant amount, leak check.
10 Times 3 Times Continuous A3
Compressor temperature
error
Compressor Temperature Thermistor Error – Protection stop by compressor temperature ≥226°F (107.8°C) during
compressor operation generated 2 times within 24 hours.
-Check if 3-way valve is open.
-Check EEV, strainer.
-Check outdoor unit fan, heat exchanger.
-Check compressor thermistor, loose connection.
-Check refrigerant amount, leak check.
10 Times 5 Times Continuous A5 Low pressure error
Low Pressure Error – Protection stop by suction pressure < 0.02MPaG continued for 5 minutes, repeats 5 times
within 2 hours.
-Check if 3-way valve is open.
-Check EEV, strainer.
-Check outdoor unit fan, heat exchanger.
-Check discharge thermistor.
-Check refrigerant amount, leak check.
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