If you have a Daikin mini split that is not working, the fault codes can be pulled using the remote control.
A flashing green light often appears on a Daikin unit when there is a problem.
The remote control Cancel button is used to pull the code from the unit.
Once the code is known, the problem can be troubleshot and fixed.
The Cancel button on the remote control is held for 5-6 seconds until a 00 is shown on the display.
Once in the mode, the Cancel button will cycle through the codes giving short beeps for non-errors and a long beep for the problem error.
This has been tested and works with L-Series, Q-Series, Cobra models, and more.
Below are the steps to follow to find the error code on a Daikin mini split.
How To Find the Fault Code on a Daikin Mini Split System
- On the remote control, find the Cancel button.
- Press and hold the Cancel button for 6 seconds.
- 00 will flash on the remote display.
- Press the Cancel button again once to cycle through the fault codes.
- A short beep will be heard each time the Cancel button is pressed. A Long beep will be the error code.
Daikin Mini Split Fault Code Meaning
Once the code is found, it can be looked up using the Daikin error code chart.
For example, the error code U4 was found above, with the chart showing there is a communication problem between the indoor and outdoor units.
A U4 error code can often be cleared by turning off the power to both indoor and outdoor units at the breaker.
Read here for a full list of Daikin Mini Split Error Codes.
Daikin Mini Split Error Codes and Meanings
| Error Code | Status |
|---|---|
| 00 | NORMAL |
| U0 | REFRIGERANT SHORTAGE |
| U2 | OVER-VOLTAGE DETECTION |
| U4 | SIGNAL TRANSMISSION ERROR (BETWEEN INDOOR AND OUTDOOR UNIT) |
| A1 | INDOOR UNIT PCB ABNORMALITY |
| A5 | FREEZE-UP PROTECTION OR HEATING PEAK-CUT CONTROL |
| A6 | FAN MOTOR (DC MOTOR) ABNORMALITY |
| C4 | INDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY |
| C7 | FRONT PANEL OPEN /CLOSE FAULT |
| C9 | ROOM TEMPERATURE THERMISTOR ABNORMALITY |
| EA | FOUR WAY VALVE ABNORMALITY |
| E1 | OUTDOOR UNIT PCB ABNORMALITY |
| E5 | OL ACTIVATION (COMPRESSOR OVERLOAD) |
| E6 | COMPRESSOR LOCK |
| E7 | DC FAN LOCK |
| F3 | DISCHARGE PIPE TEMPERATURE CONTROL |
| H0 | COMPRESSOR SYSTEM SENSOR ABNORMALITY |
| H6 | POSITION SENSOR ABNORMALITY |
| H8 | DC VOLTAGE / CURRENT SENSOR ABNORMALITY |
| H9 | OUTDOOR TEMPERATURE THERMISTOR ABNORMALITY |
| J3 | DISCHARGE PIPE THERMISTOR ABNORMALITY |
| J6 | OUTDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY |
| L4 | RADIATION FIN TEMPERATURE RISE |
| L5 | OUTPUT OVERCURRENT DETECTION |
| P4 | RADIATION FIN THERMISTOR ABNORMALITY |
Summary
If you have a Daikin mini split that is not working properly, finding the error code is the first step to fixing it.
The code can be found on many Daikin models using the remote control and Cancel button.
Once the code is found, it can be looked up using the error code chart, which will show the problem.
Be sure to write down the code in case a technician is called to look at the unit.
Daikin split unit running after Orange light blinking unity shutdown
After a few days of the thermostats being set at 50 and mostly in activity, the green light blinks and the system will not work. Cycling the power at the CB panel solves the problem and the system works fine