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How do I fix Fujitsu error code A1?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The Fujitsu error code A1 means that the air conditioner is not receiving enough power. This can be caused by a number of things, including a tripped circuit breaker, a blown fuse, or a loose wire.

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1. Check the fuse and reset the circuit breaker

  1. Open the cover of the circuit breaker panel.
  2. Check the fuse. If it is blown, replace the fuse.
  3. Reset the circuit breaker.

2. Check the power supply and make sure it is turned on

  1. Turn on the power supply to the computer.
  2. Check to see if the power supply light is on.
  3. If the light is off, then the power supply is not turned on.
  4. Check to see if the power cord is plugged into an outlet and into the computer.
  5. If the power cord is plugged into the outlet and into the computer, then the power supply is turned on.
  6. If the power cord is not plugged into the outlet and into the computer, then the power supply is not turned on.
  7. Check to see if the power cord is properly plugged into the power supply.
  8. If the power cord is properly plugged into the power supply, then the power supply is probably turned on.
  9. If the power cord is not properly plugged into the power supply, then the power supply is not turned on and the computer will not turn on.
  10. Check to see if the power supply is connected to the computer.
  11. If the power supply is connected to the computer, then the power supply is probably turned on.
  12. If the power supply is not connected to the computer, then the power supply is not turned on and the computer will not turn on.

3. Check the connection between the indoor and outdoor units

  1. Verify that power is connected to both units.
  2. Verify that the outdoor unit is connected to the power outlet and the indoor unit is connected to the network.
  3. Verify that the outdoor unit is switched on.
  4. Verify that the indoor unit is switched on.
  5. Verify that the sensors on the outdoor unit are properly installed.
  6. Verify that the sensors on the indoor unit are properly installed.
  7. Verify that the communication cable is properly connected.
  8. Verify that the units are located in the same room.
  9. Verify that the units are located close to each other.

4. Clean or replace the air filter

In order to clean or replace the air filter on a Fujitsu computer, the user will need to open the computer and remove the the fan cover. The filter is located behind the fan cover and can be accessed by removing four screws. Once the filter is removed, it can be cleaned or replaced.

Still not working? maybe try one of these options:

  1. Check the evaporator coil and clean it if necessary.
  2. Check the condenser coil and clean it if necessary.
  3. Check the outdoor unit and make sure it is free of debris.
  4. Have a professional service the unit.