Short Description
To self diagnose any underline issue with your Daikin product refer to the given set of error codes.
Fault diagnosis by remote controller
The remote controller can receive relevant error codes from the indoor unit.
When 
is held down for about 5 seconds, "00" blinks in the temperature display section.
Press repeatedly until a long beep is produced.
- The code indication changes as shown below, and notifies with a long beep.
| CODE | MEANING | |
|---|---|---|
| System | 00 | NORMAL |
| UA | INDOOR-OUTDOOR UNIT COMBINATION FAULT | |
| U0 | REFRIGERANT SHORTAGE | |
| U2 | DROP VOLTAGE OR MAIN CIRCUIT OVERVOLTAGE | |
| U4 | FAILURE OF TRANSMISSION (BETWEEN INDOOR UNIT AND OUTDOOR UNIT) | |
| INDOOR UNIT | A1 | INDOOR PCB DEFECTIVENESS |
| A5 | FREEZE-UP PROTECTOR | |
| A6 | FAN MOTOR FAULT | |
| C4 | FAULTY HEAT EXCHANGER TEMPERATURE SENSOR | |
| C9 | FAULTY SUCTION AIR TEMPERATURE SENSOR | |
| OUTDOOR UNIT | E1 | CIRCUIT BOARD FAULT |
| E5 | OL STARTED | |
| E6 | FAULTY COMPRESSOR START UP | |
| E7 | DC FAN MOTOR FAULT | |
| E8 | OVERCURRENT INPUT | |
| F3 | HIGH TEMPERATURE DISCHARGE PIPE CONTROL | |
| F6 | HIGH PRESSURE CONTROL (IN COOLING) | |
| H0 | SENSOR FAULT | |
| H6 | OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR | |
| H8 | DC CURRENT SENSOR FAULT | |
| H9 | FAULTY SUCTION AIR TEMPERATURE SENSOR | |
| J3 | FAULTY DISCHARGE PIPE TEMPERATURE SENSOR | |
| J6 | FAULTY HEAT EXCHANGER TEMPERATURE SENSOR | |
| L3 | ELECTRICAL PARTS HEAT FAULT | |
| L4 | HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK | |
| L5 | OUTPUT OVERCURRENT | |
| P4 | FAULTY INVERTER CIRCUIT HEATSINK TEMPERATURE SENSOR |
