4 Times 1 Time Continuous 41 Indoor room thermistor error
Indoor Room Thermistor Error – Room temperature thermistor detected an abnormal temperature.
-Check thermistor for open or short. Check thermistor resistance value. (Refer to “Thermistor characteristics
table”).
-Controller PCB defective.
4 Times 2 Times Continuous 42
Indoor heat ex. (Pipe) thermistor
error
Indoor Heat Ex. (Pipe) Thermistor Error – Evaporator pipe thermistor detected an abnormal temperature.
-Check thermistor for open for open or short. Check thermistor resistance value (Refer to “Thermistor
characteristics table”).
-Controller PCB defective.
5 Times 1 Time Continuous 51 Indoor unit fan motor error
Indoor Unit Fan Motor Error – When the condition that actual frequency of indoor fan is below 1/3 of target
frequency is continued more than 56 seconds.
-Check rotation of fan.
-Check ambient temperature around motor.
-Check indoor unit fan motor resistance values.
-Replace controller PCB.
5 Times 3 Times Continuous 53 Drain pump error
Drain Pump Error – When the oat switch is on for more than 3 minutes, error will trigger.
-Check operation of oat switch, blockages, dust, etc.
-Remove oat and check on/off switching operation by using a meter.
-Check connector of (CN9) / wire.
-Check drain hose for blockages.
5 Times 7 Times Continuous 57 Damper error
Damper Error – When limit switch was not able to detect the closing though the damper is closed. (Upper air
ow)
-Check operation of limit switch.
-Check for loose connection of CN18 / shorted or pinched wire.
-Check damper for obstructions of damper movement.
-Check damper movement.
5 Times 8 Times Continuous 58 Intake grille error
Intake Grille Error – When the micro switch is detected open while running the compressor.
-Check limit switch.
-Check connector (CN11) / wire.
-Replace controller PCB.
6 Times 2 Times Continuous 62 Outdoor unit main PCB error
Outdoor Unit Main PCB Error – Access to EEPROM failed due to some cause after outdoor unit started.
-Reset power supply and operate.
-Check external cause; voltage drop, poor ground connection.
-Replace Main PCB.
6 Times 3 Times Continuous 63 Inverter error
Inverter Error – Error information received from the inverter PCB.
-Reset power to disconnect
-Check connection of molex plugs on inverter PCB for loose connections.
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