Question about Fujitsu 24C1 Air Conditioner

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The operation and timer lights on my Fujitsu ASU9RMLQ split system AC are flashing on and off several times when the unit is off. If I start it, they still flash and the unit runs poorly. If I hit "test run", nothing happens. If I throw the circuit breaker, it works normally for 5 minutes then reverts back to the flashing lights sequence again, even when I turn the unit off. What gives? I just had the unit serviced and charged a few weeks ago.

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Posted on Jan 02, 2017

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SOURCE: Fujitsu ASU9RLQ

check indoor unit sirkit board

Posted on Mar 15, 2008

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SOURCE: Fujitsu Heat Pump - problems

I had the same problem. The heater did not work in heating mode. However it was OK in air-conditioning mode. The operation light and the timer light blink twice and then the operation light blinks for 5 times followed by few seconds non blinking, then the cycle repeats again. I have read on the internet that you better unplug the power cord and then plug it again so that the heater re-sets itself. My only problem was that my heater is directly plugged to the power with no visible plug. So I went to the main distribution board and put off the power for about 20 seconds for the whole home. HOORAY!! The heater worked after that.

Posted on Aug 08, 2008

  • 14 Answers

SOURCE: I installed a Fujitsu ductless split system lines freeze on one

do you have a kink in that suction line?

Posted on Aug 09, 2009

technic_7117
  • 38 Answers

SOURCE: THE RED (OPERATION) LIGHT AND

replace the thermistor

Posted on Aug 16, 2010

  • 2 Answers

SOURCE: The operation and timer lights on my Fujitsu split

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.

Posted on Nov 23, 2010

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The operation and timer lights on my Fujitsu split system are flashing on and off several times when the unit is switched off I noticed this after the system had stopped blowing air & I knew the room...


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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communications error
try resetting the breaker
this should clear the eprom

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