If you have an error code on a Daikin mini split, the problem can be found by using a chart with the codes listed.
Sometimes Daikin unit will not be working, and no code displays, in which case the remote control can be used to find the error code.
To use the remote control to find an error code, press the Cancel button on the remote control for 5-6 seconds until 00 is shown on the display.
After the 00 flashes, the Cancel button will cycle through the codes giving short beeps for non-errors and a long beep for the problem error.
Read here for how to find a Daikin error code using the remote control.
Below are the error codes on the left and the malfunction to the right.
For example, for an E1 error code, it would be a defective outdoor PCB.
The chart also gives possible causes; for example, the E1 could be a defective outdoor PCB or a defective connection of the inside or outside relay wires.
Daikin Mini Split Error Codes List
Daikin Mini Split Error Code List 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 |
How to Troubleshoot a Daikin Mini Split
Troubleshooting a Daikin mini split starts with knowing what part of the unit had malfunctioned.
To know which part has malfunctioned, the error code on the unit will need to be looked up on an error code chart.
If there is no code on the unit, the remote control can be used to also pull up errors.
Once the problem is known, more specific causes and fixes can be done to get the system back up and working.
Daikin mini splits are good units that will work for many years with no issues, but sometimes things can go wrong.
When they do go wrong, finding the code and looking it up chart is the first step to solving the problem.
There are many components inside a unit with a code that will display when that component goes bad or fails.
Have you had an issue with a Daikin mini split? Let us know your thoughts below..