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Error Code
The E3 error code indicates a low-pressure protection issue in your Fujitsu air conditioning system. This typically occurs when refrigerant pressure drops below normal operating levels.
Insufficient refrigerant can cause the pressure to drop below normal levels.
Leaks can result in a drop in pressure and trigger this error.
The pressure sensors may be malfunctioning and giving incorrect readings.
Have a professional inspect and top up the refrigerant.
Inspect the refrigerant lines for any signs of leaks.
Consult a technician to inspect the pressure sensors for malfunctions.
