All AC Error Code List
Companies use some codes to show errors related to AC ie Air conditioners. This makes it easier for the user, manufacturer, and mechanic to understand and fix errors. Each air conditioner company uses different codes.
List of all AC Error Codes for Inverter
| CODE | MEANING |
|---|---|
| 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) |
| A1 | INDOOR PCB DEFECTIVENESS |
| A5 | FREEZE-UP PROTECTOR |
| A6 | FAN MOTOR FAULT |
| C4 | FAULTY HEAT EXCHANGER TEMPERATURE SENSOR |
| C9 | FAULTY SUCTION AIR TEMPERATURE SENSOR |
| 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 |