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I have a fujitsu model AOU18RD mini split ac works, heat pump operates for a short time and then it will stop working the timer light flases constantly and the red light flashes 6 times and repeats until power is shut off for a period of time.

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hvac1960
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Indoor coil thermistor is short. Replace it. It's located in indoor coil ending with copper sealed tub. Thanks.

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  • 86 Answers

SOURCE: Fujitsu ASU9RLQ

check indoor unit sirkit board

Posted on Mar 15, 2008

  • 1 Answer

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

  • 1 Answer

SOURCE: i have a Fujitsu ASTA24LCC

Check your filters. Manual says they need to be cleaned every two weeks under normal operation (and in my case more often during renovations). It seems it may not take much to limit air flow enough for the indoor unit to trip out. Hope this helps.

Posted on Aug 24, 2008

koolbreezes
  • 540 Answers

SOURCE: My fujitsu split type aircon is not working, the

Can you check the service manual for the diagnostic code?

Posted on Dec 22, 2009

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