Question about Fujitsu HFI ASU12RLF Wall Mounted Single Zone Heat Pump Mini Split 22 SEER -

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Troubleshooting fujitsu indoor unit ASU12RLF mini split

Cooling does not come on the economy light fleshes rapidly and the operation and timer light flash in a pulsating motion

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 86 Answers

SOURCE: Fujitsu ASU9RLQ

check indoor unit sirkit board

Posted on Mar 15, 2008

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

heatman101
  • 43501 Answers

SOURCE: Fujitsu Air Conditioning split unit Model

Your compressor is seized up. shut down unit and let compressor cool down, it may start again but probably needs to be replaced.... sorry for the bad news,

Posted on Nov 12, 2009

  • 10 Answers

SOURCE: fujitsu outdoor unit not working

Its possible there has been a power spike and it has dammaged the power pcb. Remove the cover and inpect the PCB's for blackening. If any blakening replace the damaged PCB.

Posted on Jul 15, 2010

vetteman3002
  • 2299 Answers

SOURCE: Hi ...we have a split

There is a relay that the thermostat pulls in, in the unit outside. When this happens, the compressor pulls in and the unit outside will run. The compressor has to run before the unit will cool.

Posted on Jan 14, 2011

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FUJITSU Inverter wall mounted split air conditioner Model : AST12LSBCW not working, flashing lights


This is a "PFC circuit abnormal" in the outdoor unit meaning that the outdoor controller board is faulty. Try turning the machine off at the isolator switch for 10 mins, then back on to see if the error resets. If not you will need a new controller PCB.

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My Fujitsu air con keep flashing operation,timer and economy .off the plug took out and on back still the same.took out the batery from remote and put back still the same..plss help me


It's asking you what mode you want to run your unit in. Do you want to run it in heating or cooling (operation), do you want to run it with economizer mode (economy), or do you want to run it with a timer setting (timer). Do cooling, no economizer, and no timer. This will make your unit run off off the setpoint you want. I.e. 72 degrees

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does the ac continue to make the noise even in fan only mode or is only in cooling mode. If only in cooling then it could be a gas related problem or blocked coil.

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The indoor unit has the problem and it's the air thermistor. You need to replace it.

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How to use thermostat for heat on Fujitsu IAQ halcyon



This unit comes with a remote control (optional wall mounted wired thermostat available) as a standard feature. This unit is precharged with the environment friendly R-410a refrigerant. No additional refrigerant is needed if the line set is 49 feet in lenght or shorter. In addition to its very high 20 SEER efficiency rating, the 15RLQ is only 31 in. long which makes it the smallest Mini-Split System in its category through out the industry.
This category of equipment is ideal for smaller spaces where spot cooling is required. Several models in this category are ENERGY STAR Certified, meaning they save you money on your utility bill. Residential applications including sunrooms and additions are made easier with these air conditioners and heat pumps. Do you have a warm spot in your home? Fujitsu mini-splits can provide extra cooling capacity for those hard to cool areas. Commercially, their small size makes them ideal for small offices, providing individual temperature control.
Fujitsu's I.A.Q. Systems provide residential and commercial property owners an innovative solution for clean, temperature-controlled indoor air. The Halcyon IAQ systems deliver powerful heating and cooling, are designed for ease of use and maintenance, and feature an unobtrusive design which can be integrated easily into any decor. The Halcyon IAQ systems filter dust, pollen and odor making them the perfect addition to any home!
Standard Features system15_18rlq_medium.jpg
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  • Plasma Filter
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  • 24 Hour Timer
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  • Auto Mode
  • Quiet Mode
  • Auto Restart/Rest
  • Auto Changeover
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Warranty All Fujitsu ductless mini-split air conditioners and heat pumps come with a 2 year parts and 6 year compressor warranty.
Important: All installations must be performed or supervised by a certified HVAC technician in order for the warranty to be valid.

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1 Answer

Fujitsu ASU9RLQ


check indoor unit sirkit board

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