Daikin Mini-Split Error Codes
Complete list of Daikin mini-split error codes with causes and how to fix them.
A1
🟡
Daikin Mini-Split error code A1: PCB defect (indoor unit).
Technician Required
A3
🟢
Daikin Mini-Split error code A3: Drain level system malfunction.
✓ DIY Possible
A5
🟡
Daikin Mini-Split error code A5: Freeze-up or high-pressure protection.
Technician Required
A6
🟡
Daikin Mini-Split error code A6: Fan motor overload / overcurrent.
Technician Required
A7
🟡
Daikin Mini-Split error code A7: Swing flap motor malfunction.
Technician Required
A9
🟡
Daikin Mini-Split error code A9: Electronic expansion valve malfunction.
Technician Required
AH
🟢
Daikin Mini-Split error code AH: Humidity sensor malfunction.
✓ DIY Possible
AJ
🟡
Daikin Mini-Split error code AJ: Capacity setting error.
Technician Required
C4
🟢
Daikin Mini-Split error code C4: Thermistor malfunction (liquid pipe sensor).
✓ DIY Possible
C5
🔴
Daikin Mini-Split error code C5: Thermistor malfunction (gas pipe sensor).
Technician Required
C9
🟢
Daikin Mini-Split error code C9: Thermistor malfunction (indoor air sensor).
✓ DIY Possible
CA
🟢
Daikin Mini-Split error code CA: Thermistor malfunction (discharge air sensor).
✓ DIY Possible
CJ
🟢
Daikin Mini-Split error code CJ: Thermistor malfunction (humidity sensor).
✓ DIY Possible
E1
🟡
Daikin Mini-Split error code E1: PCB defect (outdoor unit).
Technician Required
E3
🔴
Daikin Mini-Split error code E3: High pressure protection.
Technician Required
E4
🔴
Daikin Mini-Split error code E4: Low pressure protection.
Technician Required
E5
🟡
Daikin Mini-Split error code E5: Inverter overcurrent protection.
Technician Required
E6
🟡
Daikin Mini-Split error code E6: Compressor motor lock protection.
Technician Required
E7
🟡
Daikin Mini-Split error code E7: Fan motor overcurrent protection.
Technician Required
E8
🟡
Daikin Mini-Split error code E8: Input overcurrent protection.
Technician Required
EA
🟡
Daikin Mini-Split error code EA: Four-way valve defect.
Technician Required
EC
🔴
Daikin Mini-Split error code EC: Refrigerant overcharge or expansion valve …
Technician Required
EE
🟡
Daikin Mini-Split error code EE: EEPROM error.
Technician Required
F3
🟡
Daikin Mini-Split error code F3: Discharge pipe high temperature protection.
Technician Required
H6
🟡
Daikin Mini-Split error code H6: Position sensor (DC motor) abnormal.
Technician Required
H7
🟡
Daikin Mini-Split error code H7: Fan motor position sensor malfunction.
Technician Required
H8
🟡
Daikin Mini-Split error code H8: CT (current transformer) input circuit …
Technician Required
H9
🟢
Daikin Mini-Split error code H9: Outdoor air thermistor malfunction.
✓ DIY Possible
J1
🟢
Daikin Mini-Split error code J1: Pressure sensor malfunction.
✓ DIY Possible
J3
🟢
Daikin Mini-Split error code J3: Discharge pipe thermistor malfunction.
✓ DIY Possible
J5
🟢
Daikin Mini-Split error code J5: Suction pipe thermistor malfunction.
✓ DIY Possible
J6
🟢
Daikin Mini-Split error code J6: Outdoor coil thermistor malfunction.
✓ DIY Possible
J8
🟢
Daikin Mini-Split error code J8: Liquid pipe thermistor malfunction.
✓ DIY Possible
J9
🟢
Daikin Mini-Split error code J9: Subcooling coil outlet thermistor malfunction.
✓ DIY Possible
L1
🟡
Daikin Mini-Split error code L1: PCB malfunction (outdoor unit).
Technician Required
L4
🟡
Daikin Mini-Split error code L4: Radiation fin temperature rise protection.
Technician Required
L5
🟡
Daikin Mini-Split error code L5: Output overcurrent protection.
Technician Required
L8
🟡
Daikin Mini-Split error code L8: Output overcurrent protection (compressor).
Technician Required
L9
🟡
Daikin Mini-Split error code L9: Compressor startup failure.
Technician Required
LC
🟡
Daikin Mini-Split error code LC: Communication error between inverter and …
Technician Required
P1
🟡
Daikin Mini-Split error code P1: Phase loss detection.
Technician Required
P4
🟢
Daikin Mini-Split error code P4: Radiation fin thermistor malfunction.
✓ DIY Possible
U0
🔴
Daikin Mini-Split error code U0: Insufficient refrigerant.
Technician Required
U2
🔴
Daikin Mini-Split error code U2: Low voltage or overvoltage protection.
Technician Required
U4
🟡
Daikin Mini-Split error code U4: Communication failure between indoor and …
Technician Required
UA
🟡
Daikin Mini-Split error code UA: Combination error.
Technician Required
UC
🟡
Daikin Mini-Split error code UC: Centralized control system mismatch.
Technician Required