Mitsubishi Electric AC Error Codes
Complete list of Mitsubishi Electric air conditioner error codes with meanings and solutions
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Mitsubishi Electric Error Code List
| Code | Meaning | Severity | Fix |
|---|---|---|---|
| P1 | Intake sensor error | Medium | Check room temperature sensor |
| P2 | Pipe (TH2) sensor error | Medium | Check pipe temperature sensor |
| P4 | Drain sensor error | Medium | Check drain sensor or drainage system |
| P5 | Drain pump error | Medium | Check drain pump operation |
| P6 | Freezing/overheating protection | High | Clean filters, check airflow and refrigerant |
| E6 | Indoor/outdoor communication error | High | Check wiring between units |
| E7 | Outdoor unit error | High | Check outdoor unit components |
| U2 | High pressure abnormality | Critical | Clean condenser and check refrigerant |
| U3 | Open/short of outdoor discharge sensor | Medium | Check discharge temperature sensor |
| U4 | Low pressure abnormality | Critical | Check refrigerant level and evaporator |
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Understanding Mitsubishi Electric AC Error Codes
Mitsubishi Electric air conditioners display error codes when they detect problems with the system. These codes help identify issues quickly, saving time and money on diagnostics. Understanding these codes can help you determine whether you can fix the issue yourself or need to call a professional.
Severity Levels Explained
- Critical: Serious issues that require immediate professional attention. Do not operate the unit.
- High: Significant problems that should be addressed soon. Unit may work intermittently.
- Medium: Issues that affect performance but aren't urgent. Can often be fixed with basic troubleshooting.
- Low: Minor issues or informational codes. Usually resolved with simple actions like filter cleaning.
Basic Troubleshooting Steps
- Note down the error code displayed
- Turn off the AC and unplug it
- Wait 5 minutes before restarting
- If the error persists, check the meaning above
- For critical errors, contact a certified Mitsubishi Electric technician
When to Call a Professional
While some error codes indicate simple issues like dirty filters, others point to serious problems requiring professional repair. Always call a technician for:
- Compressor-related errors
- Electrical or high-voltage issues
- Refrigerant leaks or pressure problems
- Errors that don't clear after reset
- Any error you're not comfortable diagnosing
Frequently Asked Questions
How do I reset my Mitsubishi Electric AC after an error?▼
To reset your Mitsubishi Electric AC: 1) Turn off the unit using the remote or power button. 2) Unplug it from the power outlet. 3) Wait 2-3 minutes. 4) Plug it back in and turn on. If the error persists, the issue may require professional service.
What do Mitsubishi Electric AC error codes mean?▼
Mitsubishi Electric AC error codes indicate specific issues with your unit. Common categories include sensor errors, communication problems, compressor issues, and electrical faults. Use the table above to identify your specific error code.
When should I call a technician for my Mitsubishi Electric AC?▼
Call a technician for: 1) Critical errors related to compressor or electrical issues. 2) Errors that persist after resetting the unit. 3) Any error involving refrigerant leaks or high-voltage components. Never attempt to fix critical issues yourself.
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