Mitsubishi MXZ-SM30NAFZ Heat Pump Error Codes
MXZ-SM30NAFZ Error Code Reference
Section titled “MXZ-SM30NAFZ Error Code Reference”Mitsubishi MXZ-SM Hyper-Heating 30000 BTU multi-split heat pump with H2i® technology.
| Error Code | Fault Description |
|---|---|
| E1 | High pressure protection activated |
| E6 | Communication error between indoor and outdoor unit |
| E8 | Outdoor unit overcurrent protection |
| EE | EEPROM memory error on control PCB |
| F3 | High discharge pipe temperature |
| U4 | Signal transmission failure (control bus) |