9 Times 7 Times Continuous 97 Outdoor unit fan motor error
Outdoor Unit Fan Motor Error – When outdoor fan motor rotation speed is less than 100 RPMs in 20 seconds
after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60 seconds is
repeated 3 times in a row, compressor and fan motor stops.
-Check rotation of fan, locked motor, or resistance for motor to rotate.
-Check ambient temperature around motor, excessive high temperature around motor or surrounding
equipment that causes heat.
-Ohm fan motor windings, check for DC voltage to motor.
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.
10 Times 5 Times Continuous A5 Low pressure error
Low Pressure Error – Protection stop by suction pressure ≤7.35 PSI continued for 5 minutes, repeats 5 times
within 2 hours.
-Check if 3-way valve (gas side) is open.
-Clogged strainer.
-Check ohm resistance value of EEV coil.
-Check suction pressure sensor.
-Check refrigerant amount.
13 Times 2 Times Continuous J2 Branch box error
Branch Box Error – When the branch box stops communicating with connected indoor units.
-Reset power supply and operate.
-Check molex plugs for loose or erroneous connections.
-Check for defective or crossed eld wiring.
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