80
Multi VRF Indoor
Unit Service Manual
Notes: [1] Bright and dark intermittently; [2] Bright and dark simultaneously
Error display of mainboard LED of wall-mounted type indoor unit (Ling Ge Feng)
Error Error Code Error Error Code
Prevention against low temperature E2 Error with oil temperature sensor 2 (digital) Fb
Outdoor ambient temperature sensor error F4 Indoor ambient temperature sensor error F0
Outdoor tube-inlet sensor error F5 Exhaust overtemperature E4
Outdoor tube-middle sensor error F6 Low-pressure protection E3
Outdoor tube-exit sensor error F7 Overcurrent Protector E5
F8 High-pressure protection E1
Indoor tube-inlet sensor error F1 Communication error E6
Indoor tube-middle sensor error F2 High-pressure valve error Fc
Indoor tube-exit sensor error F3 Low-pressure valve error Fd
Error with exhaust temperature sensor 2 (digital) F9 E7
FA
Error Electrical source LED Error Electrical source LED
Tube-inlet sensor error
Tube-middle sensor error
Tube-exit sensor error
Room sensor error
Defrost
Antifreeze
Communication error
Outdoor unit failure
Auxiliary heater error
Floor and wall mounted type:The “88” display reveals the error code, while the indicating LED indicates
Floor standing type:The “88” display reveals the error code, while the indicating LED indicates the status
1�2 Number of Indoor Unit
Note:
Press the SW3 button of outdoor unit for successive 2 times within 2s, and the number of indoor unit will
be detected. In that case, LED1~ LED4 will blink in turn while LED5 and LED6 will be dark. The number of
indoor unit will be shown 12s later.
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