Daikin Mini Split Error Codes

34 codes · manual-verified where marked · draft entries clearly flagged

E-codes

Daikin E1 error code draft
E1 returns. Tell them the code is outdoor PCB abnormality. Technician boundary Stop here: compressor and elect…
Daikin E3 error code draft
E3 returns. Tell them the code is high-pressure switch actuation. Technician boundary Stop here: refrigerant o…
Daikin E5 error code
E5 on Daikin mini splits means the compressor has overloaded or, on some models, the high-pressure switch trip…
Daikin E6 error code draft
E6 returns or the outdoor unit clicks/hums without starting. Tell them the code is compressor lock/startup abn…
Daikin E7 error code draft
E7 returns, the blade is damaged, or the fan is not visibly blocked. Tell them the code is outdoor DC fan lock…
Daikin E8 error code draft
E8 returns or any breaker trips. Tell them the code is input overcurrent detection. Technician boundary Stop h…
Daikin E9 error code draft
E9 returns. Tell them the MXM table identifies the outdoor electronic expansion valve coil. Technician boundar…

Daikin F3 error code draft
F3 means the compressor discharge temperature is too high or the unit is limiting operation to protect itself.…
Daikin F6 error code draft
F6 means the system limited or stopped cooling because pressure/temperature conditions were too high. The safe…
Daikin F8 error code draft
F8 returns after airflow is corrected or the outdoor unit struggles to run. Tell them the code is compressor i…

Daikin H0 error code draft
H0 returns. Tell them the code is compressor system sensor abnormality. Technician boundary Stop here: compres…
Daikin H3 error code draft
H3 returns. Tell them the MXM table lists high-pressure sensor/switch abnormality. Technician boundary Stop he…
Daikin H6 error code draft
H6 returns or the outdoor unit will not start. Tell them the code is compressor position sensor abnormality. T…
Daikin H7 error code draft
H7 returns. Tell them the MXM table lists fan IPM temperature error. Technician boundary Stop here: electrical…
Daikin H8 error code draft
H8 returns. Tell them the code is DC voltage/current sensor abnormality. Technician boundary Stop here: compre…
Daikin H9 error code draft
H9 returns. Tell them the code is outdoor air thermistor abnormality. Technician boundary Stop here: compresso…

Daikin L0 error code draft
L0 returns. Tell them the MXM table lists outdoor inverter system fault. Technician boundary Stop here: compre…
Daikin L3 error code draft
L3 means the outdoor electrical box area got too hot or the unit believes it did. Blocked outdoor airflow and …
Daikin L4 error code draft
L4 means the outdoor inverter heat sink/radiation fin temperature is too high or the sensor path suggests it i…
Daikin L5 error code
L5 on Daikin mini splits means the inverter output current to the compressor is abnormal (output overcurrent /…
Daikin L6 error code draft
L6 appears. Tell them the MXM table lists compressor motor ground/short circuit. Technician boundary Stop here…
Daikin L8 error code draft
L8 returns. Tell them the MXM table lists compressor overload or motor wire disconnection. Technician boundary…
Daikin L9 error code draft
L9 returns. Tell them the MXM table lists compressor lock. Technician boundary Stop here: compressor and elect…

Daikin P1 error code draft
P1 returns or any breaker trips. Tell them the code is power voltage imbalance/phase loss. Technician boundary…
Daikin P4 error code draft
P4 returns. Tell them the code is inverter heat sink/radiation fin thermistor abnormality. Technician boundary…

Daikin U0 error code
U0 on Daikin mini splits means refrigerant shortage or pressure drop is detected. On current R-32 systems trea…
Daikin U1 error code draft
U1 returns or any breaker trips. Tell them the code is reversed/lost phase. Technician boundary Stop here: com…
Daikin U2 error code draft
U2 returns, lights dim, or a breaker trips. Tell them the code is Daikin voltage protection. Technician bounda…
Daikin U4 error code
U4 on Daikin mini splits means the indoor and outdoor units are not communicating reliably. It is almost never…
Daikin U5 error code draft
U5 returns or the controller will not communicate. Tell them the code is indoor-to-remote-controller transmiss…
Daikin U6 error code draft
U6 returns. Tell them the MXM table lists indoor-unit transmission. Technician boundary Stop here: compressor …
Daikin U7 error code draft
U7 returns. Tell them the code is outdoor PCB/outdoor-unit transmission. Technician boundary Stop here: compre…
Daikin U8 error code draft
U8 returns. Tell them the code is main/sub remote-controller transmission. Technician boundary Stop here: comp…
Daikin U9 error code draft
U9 returns. Tell them the MXM table points to transmission within a single system. Technician boundary Stop he…