Carrier Mini-Splits: 38 - 40GVQ
Re: Error Codes
| ERROR CODES AT INDOOR UNIT | |
| CODE | DESCRIPTION |
| EE | Indoor PCB Malfunction. Replace indoor main board. |
| E2 | Anti-freeze Protection. Outdoor ambient temperature is too low. |
| E4 | Discharge temperature sensor out of range. |
| E5 | Low voltage protection |
| E6 | Communication malfunction |
| E8 | System overload protection |
| U8 | Indoor board malfunction |
| H6 | Indoor motor malfunction |
| C5 | Missing jumper from indoor board |
| F1 | Return air temperature sensor malfunction |
| F2 | Indoor pipe temperature sensor malfunction |
| F3 | Outdoor ambient temperature sensor malfunction |
| F4 | Condenser temperature sensor malfunction (open or shorted) |
| F5 | Discharge temperature sensor malfunction (open or shorted) |
| F6 | Overload limit, compressor speed reduction |
| F8 | Over current compressor speed reduction |
| F9 | Compressor discharge temperature high, compressor speed reduction |
| PH | Over voltage protection |
| U5 | Current detection malfunction |
| P5 | Compressor current protection |
| H1 | Defrosting |
| H3 | Compressor overload protection |
| H4 | System overload protection |
| H5 | IPM protection |
| HC | PFC (power factor correction) board protection |
| H7 | Compressor speed reduction |
| H0 | Ambient temperature cut off range |
| LC | Compressor start-up failure |
| U1 | Compressor phase detection error |