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What to do if my Fujitsu AUU18RLF Air Conditioner remote is not working due to a communication error?
If you're experiencing a Wired Remote Controller Communication Error with your Fujitsu Air Conditioner, check the voltage. If it's DC12V, the remote control has failed and should be replaced. If it's DC 0V, the Controller PCB has failed and should be replaced after rechecking the remote control.
What to do if my Fujitsu AUU18RLF has a drainage error?
If your Fujitsu Air Conditioner is experiencing drainage issues, start by inspecting the float switch for proper operation using a meter to check its on/off switching. If the float switch is defective, replace it. Also, examine the drain hose for any clogs and clear them if necessary. If these steps don't resolve the issue, consider replacing the controller PCB.
How to fix a Fujitsu AUU18RLF Air Conditioner indoor unit fan motor error?
If you're encountering an indoor unit fan motor error with your Fujitsu Air Conditioner, check first the fan and bearing. If either is damaged, replace them. If the motor itself is faulty, replace the indoor unit fan motor. If these steps do not resolve the issue, replace the controller PCB.
What to do if my Fujitsu AUU18RLF shows an indoor room thermistor error?
If your Fujitsu Air Conditioner displays an indoor room thermistor error, begin by checking the connector to ensure it is securely attached and properly connected, and verify that the thermistor cable is not open. If the thermistor is either open or shorted, replace it and then reset the power.
How to troubleshoot an Indoor Unit Model Information Error on my Fujitsu AUU18RLF?
If your Fujitsu Air Conditioner is showing an Indoor Unit Model Information Error, check for external causes such as noise and ensure the ground connection is properly connected. Also, inspect all connectors for looseness or incorrect wiring, and check the PCB for any shorts or corrosion. If the problem persists, consider replacing the Controller PCB.
What does an Indoor Unit Capacity Error mean on my Fujitsu AUU18RLF?
If your Fujitsu Air Conditioner is showing an Indoor Unit Capacity Error, first verify the total capacity of the connected indoor units. If an abnormal condition is found, correct it by referring to the Installation Manual or Design & Technical Manual. If the problem persists, replace the Main PCB of the Outdoor unit.
How to fix a Serial Communication Error (Serial Reverse Transfer Error) on a Fujitsu AUU18RLF Air Conditioner?
If your Fujitsu Air Conditioner displays a Serial Communication Error (Serial Reverse Transfer Error), check all connection lines between the indoor and outdoor units for any looseness or disconnections, referring to the Installation Manual or Data & Technical Manual for correction. Also, check the voltage of the power supply, ensuring it appears at the outdoor unit terminal L1 - L2 within the range of AC187V - 253V. Check that the indicated value swings between AC90V and AC270V at outdoor unit terminal 1 - 3. If the outdoor fan motor, active filter module, or IPM is abnormal, replace the corresponding part. If all parts are normal, replace the Main PCB.
How to resolve a Damper (Open/Close) simultaneous detection Limit switch error on a Fujitsu AUU18RLF Air Conditioner?
If your Fujitsu Air Conditioner displays a Damper(Open/Close) simultaneous detection Limit switch error, replace the limit switch if it is defective. If the problem persists, replace the Controller PCB.
General| Brand | Fujitsu |
|---|---|
| Model | AUU18RLF |
| Category | Air Conditioner |
| Language | English |
Compressor frequency control based on various factors.
Automatic switching between modes based on temperature changes.
Details indoor fan speed settings for different operation modes and models.
Explains airflow control and fan speed in different modes.
Describes airflow adjustment based on room temperature in cooling mode.
Details automatic fan control during dry operation based on room temperature.
Explains airflow control based on room temperature in heating mode.
Sets indoor fan speed based on indoor heat exchanger temperature in heating mode.
Controls vertical airflow direction and swing operation for different types.
Explains vertical and horizontal airflow swing operations.
Shows fan speeds for outdoor units in cooling and heating modes.
Details compressor operation frequency ranges for different modes and models.
Illustrates compressor frequency control behavior during start-up.
Explains timer settings (ON/OFF, Program, Sleep) for wireless remotes.
Details ON/OFF timer functions for air conditioner operation.
Describes how program timer allows combining ON and OFF timers.
Refers to ON/OFF timer functions described for wireless remotes.
Explains weekly timer function for setting daily operation times.
Describes timer function for changing setting temperatures daily.
Details procedures for test operation using wireless and wired remotes.
Explains the 3-minute delay before compressor restart after stopping.
Describes the 3-minute delay for 4-way valve switching from cooling to heating.
Describes manual auto operation function without a remote control.
Instructions on setting air outlet selection for upper/lower airflow.
Instructions on setting air outlet selection for upper airflow only.
Conditions for starting normal, integrating, and off-count defrost operations.
Release conditions for defrost operation based on temperature and time.
Instructions for resetting automatic wiring correction memory.
Prevents over-rise of discharge gas temperature by controlling compressor frequency.
Controls compressor frequency to prevent exceeding current limit.
Stops compressor and displays error if cooling discharge pressure is too high.
Details error display patterns for indoor units and wired remotes.
Explains how to check for system errors displayed as "Er".
Describes how to view up to 16 memorized error codes.
Explains error display on simple remote controllers.
Details how errors are shown on central remote controllers.
Explains how outdoor unit LEDs indicate error location and code.
Troubleshooting steps for outdoor unit serial communication errors.
Troubleshooting steps for indoor unit serial communication errors.
Troubleshooting steps for wired remote controller communication errors.
Troubleshooting steps for communication errors between controller and outdoor unit.
Troubleshooting steps for indoor unit capacity errors.
Troubleshooting steps for EEPROM access errors in indoor units.
Troubleshooting steps for manual auto switch errors.
Troubleshooting steps for indoor room thermistor errors.
Troubleshooting steps for indoor heat exchanger thermistor errors.
Troubleshooting steps for indoor unit fan motor errors.
Troubleshooting steps for drain pump errors.
Troubleshooting steps for damper limit switch errors.
Troubleshooting for simultaneous detection errors of damper limit switches.
Troubleshooting steps for intake grille errors.
Troubleshooting steps for outdoor unit model information errors.
Troubleshooting steps for outdoor unit EEPROM access errors.
Troubleshooting steps for outdoor unit EEPROM data corruption errors.
Troubleshooting steps for inverter errors in outdoor units.
Troubleshooting steps for active filter errors in outdoor units.
Troubleshooting steps for IPM errors in outdoor units.
Troubleshooting steps for discharge thermistor errors.
Troubleshooting steps for compressor thermistor errors.
Troubleshooting steps for heat exchanger thermistor errors.
Troubleshooting steps for outdoor thermistor errors.
Troubleshooting steps for 2-way valve thermistor errors.
Troubleshooting steps for 3-way valve thermistor errors.
Troubleshooting steps for CT errors in outdoor units.
Troubleshooting steps for discharge pressure sensor errors.
Troubleshooting steps for over current errors in outdoor units.
Troubleshooting steps for compressor control errors.
Troubleshooting steps for outdoor unit fan motor errors.
Troubleshooting steps for 4-way valve errors.
Troubleshooting steps for expansion valve coil errors.
Troubleshooting steps for discharge temperature errors.
Troubleshooting steps for compressor temperature errors.
Troubleshooting steps for indoor units with no power.
Troubleshooting steps for outdoor units with no power.
Troubleshooting steps for units with no operation despite power being on.
Troubleshooting steps for units not cooling or heating.
Troubleshooting steps for abnormal noise from indoor or outdoor units.
Troubleshooting steps for water leaking issues.
Information on compressor diagnosis, checks, and replacement.
Details checks for compressor terminal connections and winding resistance.
Details checks for EEV connectors, coils, and voltage.
Details checks for discharge pressure sensor voltage and characteristics.
Details checks for indoor unit fan motor rotation and resistance.
Details checks for outdoor unit fan motor rotation and resistance.
Details checks for heater unit connections, fuses, and wiring.
Details checks for active filter module open/short circuit, diodes, and output voltage.
Details checks for IPM transistor resistance and diode voltage.
Details checks and replacement procedures for the main PCB.
