MARQ INVERTER AC ERROR CODE
Md AFSAR •
| ERROR CODE | MEANING/ FAULT |
| EE | Indoor unit EEPROM fault / system memory error |
| E0 | Outdoor unit EEPROM / error fault |
| E1 | Indoor fan fault (motor or fan issue) |
| E2 | Indoor fan zero-crossing detection abnormality |
| E3 | Indoor coil or sensor fault |
| E4 | Indoor ambient temperature sensor fault |
| E6 | Communication error between indoor & outdoor units |
| E7 | Main board ↔ driver board communication fault |
| F1 | Compressor starting abnormal (phase failure / reverse) |
| F2 | Compressor out-of-step fault |
| F3 | IPM (power module) fault |
| F4 | Compressor shell or over-protection fault |
| F5 | Exhaust temperature sensor fault |
| F6 | Suction temperature sensor fault |
| F7 | Outdoor coil temperature sensor fault |
| F8 | Outdoor ambient temperature sensor fault |
| F9 | Outdoor DC fan fault |