Daikin air conditioner error codes

Modern air conditioning equipment usually has self-diagnostics systems. Such systems check whether the operation of an air conditioner is normal, and if any errors are detected, informs a user on it. Error messages are displayed in the form of codes on either the internal unit or the remote control of an air conditioner.

Modern air conditioning equipment is usually based on microprocessors. For this reason, control process over air conditioning is automatic, which enables the continuous control over the integrity of the equipment. And if the equipment faces a failure, the entire system stops thus preventing its total breakdown and helping a service technician to determine a faulty component by displaying an error code on the display.

Daikin manufactures the climate control equipment of different type and power. The error codes of the self-diagnostics system by Daikin are displayed in the form of alphanumeric codes.

Daikin air conditioner Error Codes & Description

Indoor Unit

00 Normal condition
A1 Indoor unit PCB abnormality
A5 Freeze-up protection control or heating peak-cut control
A6 Fan motor or related abnormality
C4 Indoor heat exchanger thermistor or related abnormality
C9 Room temperature thermistor or related abnormality
U4 Signal transmission error (between indoor unit and outdoor unit)
UA Unspecified voltage (between indoor unit and outdoor unit)

Outdoor Unit

00 Normal condition
UA Unspecified voltage (between indoor unit and outdoor unit)
UH Anti-icing function in other rooms
(U0) Refrigerant shortage
U2 Low-voltage detection or over-voltage detection
U7 Signal transmission error (on outdoor unit PCB) (24/32 class only)
A5 Anti-icing function
E1 Outdoor unit PCB abnormality (24/32 class only)
(E5) OL activation (compressor overload)
(E6) Compressor lock
E7 DC fan lock
E8 Input overcurrent detection
EA Four-way valve abnormality (18 class only)
F3 Discharge pipe temperature control
F6 High pressure control in cooling
H0 Compressor sensor system abnormality (24/32 class only)
H6 Position sensor abnormality
H8 CT or related abnormality
H9 Outdoor temperature thermistor or related abnormality
J3 Discharge pipe thermistor or related abnormality
J6 Outdoor heat exchanger thermistor or related abnormality
J8 Liquid pipe thermistor or related abnormality
J9 Gas pipe thermistor or related abnormality
P4 Radiation fin thermistor or related abnormality
L3 Electrical box temperature rise
L4 Radiation fin temperature rise
L5 Output overcurrent detection

Daikin air conditioner error codes

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