Product troubleshooting
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Trane / Mitsubishi Electric MSZ-FS15NA*** troubleshooting and error codes
These codes are matched from manufacturer documentation to this model's series or control platform. Keep checks visible and safe; do not open electrical, refrigerant, gas, combustion, or sealed equipment compartments.
Source-backed code set
9 matched codes
| Code | Meaning | System area | Priority |
|---|---|---|---|
| 1 blink | Miswiring or serial-signal failure | Communication | Service |
| 2 blinks | Indoor coil or room-temperature thermistor failure | Indoor sensors | Service |
| 3 blinks | Indoor fan motor failure | Indoor fan | Service |
| 4 blinks | Indoor control-system failure | Indoor control | Service |
| 5 blinks | Outdoor power-system abnormality | Outdoor power | Urgent |
| 6 blinks | Outdoor thermistor failure | Outdoor sensors | Service |
| 7 blinks | Outdoor control-system failure | Outdoor control | Service |
| 14+ blinks | Other outdoor or thermistor abnormality | Outdoor system | Urgent |
| Solid lamp | Outdoor control-system nonvolatile-memory failure | Outdoor control | Service |
No matching error codes found.