Why Fujitsu AOYS09LDC Air Conditioner shows serial reverse transfer error at starting up operation?
If your Fujitsu Air Conditioner displays a serial reverse transfer error at startup, it means the indoor unit isn't receiving a signal for 10 seconds after the power relay turns on. Check the indoor/outdoor cable connection. If the wiring is normal, measure the voltage of the outdoor unit terminals and diagnose the defective location.
What does main relay error mean on Fujitsu Air Conditioner?
If your Fujitsu Air Conditioner displays a main relay error, it means that after 2 minutes 20 seconds of stopping operation, the signal from the outdoor unit is received even though the main relay is OFF. The main relay might be defective or the Controller PCB might be defective.
What causes a room temperature thermistor defective in Fujitsu Air Conditioner?
If your Fujitsu Air Conditioner shows a room temperature thermistor defect, it means the thermistor detected an abnormal temperature when the power was turned on. Check the thermistor resistance value. The controller PCB might be defective.
What to do if my Fujitsu AOYS09LDC Air Conditioner has indoor fan speed error?
If your Fujitsu Air Conditioner displays an indoor fan speed error, it means the indoor fan speed is 1/3 of the target frequency after 56 seconds from starting or changing the fan mode. Here’s what to check: * Check the fan motor connector for looseness or defective contact. * The fan motor might be defective. * The controller PCB might be defective.
What to do if my Fujitsu AOYS09LDC has indoor fan lock error?
If your Fujitsu Air Conditioner displays an indoor fan lock error, it means the indoor fan speed is 0 rpm after 56 seconds from starting or changing the fan mode. Here’s what to check: * Check the fan motor connector for looseness or defective contact. * The fan motor might be defective. * The controller PCB might be defective.
What causes IPM protection in my Fujitsu AOYS09LDC?
If your Fujitsu Air Conditioner is showing IPM protection, it indicates that an abnormal current value has been detected. Here's what you should check: * Ensure that heat radiation is not blocked at the inlet or outlet. * Verify that the outdoor fan is functioning correctly and rotating. * The controller PCB might be defective.
What to do if my Fujitsu AOYS09LDC shows excessive high pressure protection on cooling?
If your Fujitsu Air Conditioner is showing an excessive high pressure protection error during cooling, check the following: * Ensure that heat radiation is not blocked at the inlet or outlet. * Verify that the outdoor fan is functioning correctly and rotating. * Check for any issues with the refrigeration cycle.
Details model types, electrical data, and compressor specifications.
Diagrams showing dimensions for specific indoor and outdoor unit models.
Diagrams detailing dimensions for ASYA12LCC and AOYR12LCC units.
Illustrates the refrigerant flow for specified indoor/outdoor unit models.
Shows the refrigerant system for multiple model series.
Depicts the refrigerant circuit for larger capacity models.
Electrical schematic for specified indoor and outdoor unit models.
Electrical circuit layout for ASYA12LCC and AOYR12LCC units.
Electrical circuit diagram for ASYB/AOYS09/12LDC models.
Electrical schematic for ASYA14/18LCC and AOYR14/18LCC units.
Details on discharge gas temp, current release, and pressure protections.
Steps for diagnosing when the unit fails to start.
Covers general installation rules, accessories, electrical needs, and mounting position.
General| Brand | Fujitsu |
|---|---|
| Model | AOYS09LDC |
| Category | Air Conditioner |
| Language | English |
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