Daikin split system air conditioner fault codes

Complete list of 32 checked codes for Daikin split system air conditioners, with what each code means and whether you can fix it yourself.

Reference sheet from https://faultcodeindex.com/daikin/split-system-air-conditioner/ (checked against Daikin manuals).

32 codes

Code	Meaning	What you can do
A1	Indoor unit circuit board fault	Call a pro
A5	Freeze-up or high-pressure protection tripped	Call a pro
A6	Indoor fan motor fault	Call a pro
AH	Streamer unit fault	Call a pro
C4	Indoor coil temperature sensor fault	Call a pro
C7	Front panel will not open or close	You can often fix it
C9	Room temperature sensor fault	Call a pro
CC	Humidity sensor fault	Call a pro
E1	Outdoor unit circuit board fault	Call a pro
E5	Compressor overload cutout	Call a pro
E6	Compressor will not start	Call a pro
E7	Outdoor fan motor fault	Call a pro
E8	Mains input overcurrent	Call a pro
EA	Cooling-heating changeover fault	Call a pro
F3	Compressor discharge too hot	Call a pro
F6	High-pressure protection in cooling	Call a pro
F8	Compressor overheated and stopped	Call a pro
H0	Compressor sensor circuit fault	Call a pro
H6	Position detection sensor fault	Call a pro
H8	DC current or voltage sensor fault	Call a pro
H9	Outdoor air temperature sensor fault	Call a pro
J3	Discharge pipe sensor fault	Call a pro
J6	Outdoor coil temperature sensor fault	Call a pro
J8	Liquid pipe sensor fault	Call a pro
L3	Electrical parts overheating	Call a pro
L4	Inverter heatsink overheating	Call a pro
L5	Inverter output overcurrent	Call a pro
P4	Heatsink temperature sensor fault	Call a pro
U0	System short of refrigerant	Call a pro
U2	Supply voltage out of range	Call a pro
U4	Indoor-outdoor communication fault	Call a pro
UA	Mismatched indoor and outdoor units	Call a pro

Model ranges