F3 (5202) - Low pressure sensor trouble

What does F3 mean?

There is an issue with the low-pressure sensor (63LS), which monitors the system's low-side refrigerant pressure in the Mitsubishi Electric PUMY Air Conditioner. The system will stop operating.

• Faulty low-pressure sensor
• Loose or damaged wiring connection to the sensor
• Actual low pressure condition in the refrigerant system (e.g., refrigerant leak)

Click steps to track your progress.

1. 1

   Note the error code displayed on the remote controller or outdoor unit.

2. 2

   Power off the Mitsubishi Electric PUMY Air Conditioner system at the main electrical breaker.

3. 3

   Wait for at least 30 seconds, then restore power to the system.

4. 4

   If the error persists, contact a qualified service technician to inspect the low-pressure sensor and refrigerant levels.