Troubleshooting
Page 82
For Super-slim cassette type:
Operation
lamp
Timer
lamp
Defrosting
lamp
Alarm
lamp
Display Error Information Solution
OFF Flash OFF OFF E2
Indoor room temperature sensor T1 is in open
circuit or has short circuited
Page 96
Flash OFF OFF OFF E3
Evaporator coil temperature sensor T2 is in
open circuit or has short circuited
Page 96
OFF OFF Flash OFF E4
Condenser coil temperature sensor T3 is in
open circuit or has short circuited (except for
18k/24k/36k cooling-only models)
Page 96
Flash Flash OFF OFF E7
Indoor unit EEPROM parameter error Page 97
OFF OFF OFF Flash E8
Water level alarm malfunction
Page 98
Flash Flash Flash OFF Ed
Protection of Low pressure (only for 48k
and 60k models)
Page 105
Flash OFF OFF Flash EC
Refrigerant leakage detection Page 99
Flash OFF Flash Flash F0
Communication malfunction between main
PCB and up-down panel PCB
Page 100
OFF Flash Flash Flash F1
Up-down panel malfunction Page 101
OFF ON Flash Flash F2
Up-down panel is not closed -
For other errors:
The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a
temperature reading.
Troubleshooting:
Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement.
If the unit responds, the display board requires replacement.
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