Question about Fujitsu 18C1 Air Conditioner

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I had installed fujitsu vrf system ducting type ,outdoor unit model AO54UJBMR,indoor AR22...and I have a problem becouse Ihaven't installation manual and I don't know is it impossible set up outdoor to recognise each of three indoor units'withoout remote control (I have wired type rem. controller)

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  • Mathew F
    Mathew F May 11, 2010

    Heya,
    So what do you actually want to be able to do? Do you want all three indoors working off a single remote or a remote to controll each individual evap? I am a bit confused sorry


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5 Suggested Answers

jfpogie
  • 104 Answers

SOURCE: fujitsu general ars40 duct type

you have to clean your A/C unit, indoor and outdoor, be sure all frost are de frosted before you run your unit again, or else it will frost again. if this not work your unit need re-gassing.

Posted on Jan 21, 2008

  • 21 Answers

SOURCE: split unit, I get heat but no cold

Unit will not run unless both indoor fan coils are in cool mode.

Posted on May 22, 2009

  • 10 Answers

SOURCE: Outdoor unit does not start. indoor unit fan does run.

by the sound of it the relay in the outdoor section is bad

Posted on May 31, 2009

jgwhomeequip
  • 1902 Answers

SOURCE: Fujitsu mini split outdoor unit not running, but indoor unit is running after turnning on

Check the disconnect switch and make sure that both the fuses are good and not shot. If one is shot then the system wont work. There are two fuse. Also be careful due to you will be working around 210 volts

Posted on Jun 01, 2009

  • 1 Answer

SOURCE: U4 System transmission between indoor and outdoor units Daikin

Have you found the problem with ya A/C yet PD with the U4 code, if so what was it.

Posted on Jul 27, 2010

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I have same problem like yours to my newlyinstalled Fujitsu multi-split system (the first time use since system installed1 week ago). I rang the electrician whodid the installation; he said it must be the units themselves nothing to dowith electricity. Okay, then I rang Fujitsu and their local service agent. Theysuggested me to switch off C/B for an hour to reset the units. I followed theinstruction but the indoor units still did not respond to remote control...

It simply looks like no power supply to indoor units (they are hard-wired tothe outdoor unit). So I used a multi-meter to test the power terminals of indoorunits (Danger! If you have no idea about this, don't even try! ): it seemed nopower supply even C/B is on. I turned to the isolator which next to the outdoorunit. The isolator was making arcing noise when I switched it on and off. Theindoor units suddenly turned on for few minutes then died again. So I figuredout the problem is that crooked isolator. I called the unhappy electricianto replace the isolator. End story....
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I have same problem like yours to my newly installed Fujitsu multi-split system (the first time use since system installed 1 week ago). I rang the electrician who did the installation; he said it must be the units themselves nothing to do with electricity.

Okay, then I rang Fujitsu and their local service agent. They suggested me to switch off C/B for an hour to reset the units. I followed the instruction but the indoor units still did not respond to remote control...

It simply looks like no power supply to indoor units (they are hard-wired to the outdoor unit). So I used a multi-meter to test the power terminals of indoor units (Danger! If you have no idea about this, don't even try! ): it seemed no power supply even C/B is on. I turned to the isolator which next to the outdoor unit. The isolator was making arcing noise when I switched it on and off. The indoor units suddenly turned on for few minutes then died again.

So I figured out the problem is that crooked isolator. I called the unhappy electrician to replace the isolator. End story....

I hope my experience will help you a little bit.

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Have just installed a Fujitsu Asta 24lC air con heat pump problem


Hi Shannon,
I would pursue your fight with Fujitsu, normally their units are reliable:(
It could be a really simple problem or a really complex one ranging from many componenets. A air conditioner has many more components that people may think. Keep fighting to get the unit repaired will it is still under warranty, after that Fujitsu wont want to know you. It could also be a wiring and refrigerant fault. Call Fujitsu out again.
I take the time to answer your question, so please rate me.
Thankyou Mat

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1 Answer

Fujitsu general ars40 duct type


you have to clean your A/C unit, indoor and outdoor, be sure all frost are de frosted before you run your unit again, or else it will frost again. if this not work your unit need re-gassing.

Jan 20, 2008 | Fujitsu 24R1 Air Conditioner

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