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Fujitsu ASU12RLF1 - Service Manual

Fujitsu ASU12RLF1
100 pages
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SPLIT TYPE
ROOM AIR CONDITIONER
Models Indoor unit Outdoor unit
AOU36RLXFZH
AOU45RLXFZ
INVERTER MULTI
SERVICE
INSTRUCTION
R410A
Compact Wall Mounted
Wall Mounted / Floor
Compact Cassette / Slim Duct
ARU7RLF
ARU9RLF
ARU12RLF
ARU18RLF
ARU24RLF
AUU7RLF
AUU9RLF
AUU12RLF
AUU18RLF
ASU18RLF
ASU7RLF1
ASU9RLF1
ASU12RLF1
AGU9RLF
AGU12RLF
AGU15RLF
ASU24RLF

Table of Contents

Other manuals for Fujitsu ASU12RLF1

Questions and Answers

  • M
    monica31Sep 10, 2025
    What to do if my Fujitsu ASU12RLF1 shows an indoor room thermistor error?
    • M
      Miranda WhiteSep 12, 2025
      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.
  • M
    Mr. Dale FloresAug 23, 2025
    What to do if my Fujitsu ASU12RLF1 Air Conditioner remote is not working due to a communication error?
    • I
      imillerAug 23, 2025
      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.
  • C
    cortezvictoriaAug 25, 2025
    What to do if Fujitsu ASU12RLF1 remote controller communication fails?
    • M
      Michael TurnerAug 25, 2025
      If you're experiencing communication issues with your Fujitsu Air Conditioner remote, first check the terminal connections between the remote control and the indoor unit to ensure they are secure and that there are no cable disconnections. If the connections are good, the remote control itself might be faulty and need replacement. In some cases, the Controller PCB failure can also cause this issue and should be replaced.
  • A
    Andrea HolmesAug 27, 2025
    Why Fujitsu ASU12RLF1 indoor unit fan motor is not working?
    • F
      fbeardAug 27, 2025
      There are several reasons why the indoor unit fan motor in your Fujitsu Air Conditioner might not be working. Here are a few things to check: * Try rotating the fan by hand when the unit is off to see if there's any obstruction. * The fan motor winding might be open, requiring replacement of the indoor unit fan motor. * The motor might be under protection due to a rise in surrounding temperature; try restarting the operation when the temperature comes down. * A faulty Control PCB could also be the cause, necessitating its replacement.
  • A
    adamsmonicaAug 27, 2025
    How to fix Fujitsu ASU12RLF1 Air Conditioner INDOOR UNIT Room Temperature Sensor Error?
    • M
      Matthew AlexanderAug 28, 2025
      To address a Room Temperature Sensor Error in your Fujitsu Air Conditioner indoor unit, start by checking the sensor connector to ensure it's properly connected and not loose or incorrectly connected. If the connection is secure, the thermistor itself may be faulty and require replacement. A failure in the Controller PCB can also cause this error, so consider replacing it if other solutions don't work.
  • J
    Jeffery RossAug 29, 2025
    What causes Fujitsu Air Conditioner indoor unit main PCB error and how to fix it?
    • E
      Elaine ThomasAug 29, 2025
      An error with the main PCB in your Fujitsu Air Conditioner's indoor unit can stem from a few causes. First, check if the ground connection is properly connected. Also, inspect all connectors for looseness or incorrect wiring, and look for any signs of shortage or corrosion on the PCB. If these checks don't resolve the issue, the Controller PCB might be faulty and needs replacing.
  • M
    Mrs. Nicole CurrySep 18, 2025
    What to do if my Fujitsu ASU12RLF1 Air Conditioner doesn't operate at all?
    • M
      Mr. Cameron ReedSep 18, 2025
      If your Fujitsu Air Conditioner isn't working, check these items: 1. Confirm that the circuit breaker is turned on. 2. Check for any power outages in your area. 3. Inspect the fuse or circuit breaker for any blown fuses or tripped breakers. 4. Verify the timer settings.
  • J
    jessica87Sep 12, 2025
    How to troubleshoot an Indoor Unit Model Information Error on my Fujitsu ASU12RLF1 Air Conditioner?
    • K
      Kevin CastilloSep 12, 2025
      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.
  • M
    Megan AcevedoSep 8, 2025
    How to fix a Fujitsu Air Conditioner indoor unit fan motor error?
    • C
      Christopher WolfSep 8, 2025
      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.
  • J
    Jasmin WilsonSep 5, 2025
    What causes Fujitsu ASU12RLF1 Air Conditioner INDOOR UNIT Manual auto switch error?
    • F
      Fernando ForbesSep 5, 2025
      A Manual auto switch error in your Fujitsu Air Conditioner typically arises from either a failure of the manual auto switch itself, requiring its replacement, or a failure of the Controller PCB and Indicator PCB, necessitating their change.

Summary

1. Description of Control Operations

1. Capacity Control

Compressor frequency is decided by indoor unit capacity, set temperature, room temperature, and outside temperature.

2. Auto Changeover Operation

System automatically switches between Heating, Cooling, Dry, and Monitoring modes based on temperature changes.

3. Indoor Fan Control

1. Fan Speed

Details indoor fan speeds for different operation modes and models, measured in RPM.

4. Louver Control

1. Vertical Louver Control

Explains how to adjust vertical airflow direction and the available ranges for different modes.

2. Swing Operation

Describes how to select vertical airflow swing operation for different modes.

5. Outdoor Fan Control

1. Outdoor Fan Motor

Provides fan speed data for outdoor units in Cooling and Heating modes.

6. Compressor Control

1. Operation Frequency Range

Details the compressor's operating frequency ranges for Cooling and Heating modes.

7. Timer Operation Control

7-1 Wireless Remote Controller

Explains timer settings (ON/OFF, Program, Sleep) available via the wireless remote controller.

8. Electronic Expansion Valve Control

9. Test Operation Control

Outlines procedures for performing test runs using wireless and wired remote controllers.

2. Trouble Shooting

2-1 Error Display

Lists error codes and their corresponding indoor unit and remote controller display patterns.

2-2 Trouble Shooting with Error Code

Trouble shooting 1: Serial Communication Error

Provides troubleshooting steps for serial communication errors between indoor and outdoor units.

2-3 Trouble Shooting with No Error Code

Trouble shooting 35: Indoor unit - No Power

Outlines steps to diagnose and resolve issues when the indoor unit has no power.

2-4 Service Parts Information

Service Parts Information 1: Compressor

Details troubleshooting methods for compressor issues, including diagnosis and replacement.

Fujitsu ASU12RLF1 Specifications

General IconGeneral
Energy Efficiency Ratio (EER)11.0
Heating Seasonal Performance Factor (HSPF)10.0
Voltage208-230V
RefrigerantR410A
Cooling Capacity12000 BTU/h
TypeMini-Split
Noise Level (Indoor)43 dB(A) (High) / 26 dB(A) (Low)

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