Mitsubishi MXZ-SM36NAFZ Heat Pump Error Codes
MXZ-SM36NAFZ Error Code Reference
Section titled “MXZ-SM36NAFZ Error Code Reference”Mitsubishi MXZ-SM Hyper-Heating 36000 BTU multi-split heat pump with H2i® technology.
| Error Code | Fault Description |
|---|---|
| E4 | Low pressure / refrigerant shortage detected |
| E6 | Communication error between indoor and outdoor unit |
| E7 | Outdoor fan motor fault |
| E8 | Outdoor unit overcurrent protection |
| F3 | High discharge pipe temperature |
| U4 | Signal transmission failure (control bus) |