3 Times
10
Times
Continuous
3A
Indoor unit communication
circuit (WRC) error
Indoor Unit Communication Circuit (WRC) Error – When the indoor unit detects the configuration of the remote
controller group is abnormal or the indoor unit detects lack of primary remote controller.
-Check the connection of the terminal; check the connection of the terminal between the remote controller and
indoor unit, or check between indoor unit if there is a disconnect or short of the cable.
-Check indoor unit controller PCB; check terminal voltage of the controller PCB connector on CNC01 (power
supply for remote) If 12vDC, remote controller failure, replace remote controller. If 0vDC, controller PCB failure,
replace controller PCB.
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 character-
istics 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
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 transistor PCB.
-Check wiring (Power supply to filter PCB to transistor PCB); connector and wiring connection, cable open.
-Replace transistor PCB
-Replace main PCB
-Replace filter PCB
