CONTENTS
3. TROUBLESHOOTING
1. Error code ....................................................................................................03-1
1-1. How to check the error memory......................................................................................03-1
1-2. How to erase the error memory ......................................................................................03-1
1-3. Error code table (Indoor unit and wired remote controller)..............................................03-2
1-4. Error code table (Wireless LAN indicator).......................................................................03-3
2. Troubleshooting with error code ...............................................................03-4
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit).............03-4
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) ...............03-6
2-3. E: 32. Indoor unit main PCB error (Indoor unit) ..............................................................03-8
2-4. E: 35. MANUAL AUTO button error (Indoor unit)............................................................03-9
2-5. E: 41. Room temperature sensor error (Indoor unit).....................................................03-10
2-6. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) ........................................03-11
2-7. E: 51. Indoor unit fan motor error (Indoor unit) .............................................................03-12
2-8. E: 62. Outdoor unit main PCB error (Outdoor unit).......................................................03-13
2-9. E: 64. PFC circuit error (Outdoor unit) ..........................................................................03-14
2-10. E: 65. IPM error (Outdoor unit) ...................................................................................03-15
2-11. E: 71. Discharge thermistor error (Outdoor unit).........................................................03-17
2-12. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit)............................03-18
2-13. E: 74. Outdoor temperature thermistor error (Outdoor unit)........................................03-19
2-14. E: 84. Current sensor error (Outdoor unit) ..................................................................03-20
2-15. E: 94. Trip detection (Outdoor unit) ............................................................................03-21
2-16. E: 95. Compressor motor control error (Outdoor unit) ................................................03-22
2-17. E: 97. Outdoor unit fan motor error (Outdoor unit)......................................................03-23
2-18. E: 99. 4-way valve error (Outdoor unit).......................................................................03-24
2-19. E: A1. Discharge temperature error (Outdoor unit).....................................................03-26
3. Troubleshooting without error code........................................................03-28
3-1. Indoor unit—No power..................................................................................................03-28
3-2. Outdoor unit—No power...............................................................................................03-29
3-3. No operation (Power is on)...........................................................................................03-30
3-4. No cooling/No heating ..................................................................................................03-31
3-5. Abnormal noise.............................................................................................................03-33
3-6. Water leaking................................................................................................................03-34
4. Troubleshooting with error code (For wireless LAN adapter)...............03-35
4-1. E: 18. External communication error between indoor unit and WLAN adapter .............03-35
4-2. Wireless LAN adapter error ..........................................................................................03-36
4-3. Network communication error between wireless LAN router and WLAN adapter.........03-37
4-4. E: 18. Communication error..........................................................................................03-39
4-5. E: 18. Wireless LAN adapter non-energized.................................................................03-41
4-6. Wireless LAN adapter Sleep mode (Indoor unit) ..........................................................03-42
4-7. Mobile app setting method............................................................................................03-43
5. Service parts information .........................................................................03-48
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