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We have a Fujitsu IAQ mini split. It has a high pitch rattling sound. What is your best guess as to what the problem is? The unit is three years old.

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Check blower wheel. May be broken or seating bush worn out. Or blower motor bearing worn out. Replace it.

Posted on Jan 02, 2011

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We just moved into a rental. It has the Fugitsu wall-mounted Air-conditioner model: ar-jw2 but, there was no manual left behind and we are trying to use the heat, however, it just blows cool air, we're not...


Look, if you select a temperature above ambient temperature, it will switch from cooling to heating.(assuming that the aircon has a heat pump. most do these days.) Just dont rush the aircon because every time you make a setting change, it takes a while to regulate.

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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
  • Wireless Remote Control
  • Plasma Filter
  • Sleep Timer
  • 24 Hour Timer
  • Dry Mode
  • Auto Louver: Up/Down
  • Auto Mode
  • Quiet Mode
  • Auto Restart/Rest
  • Auto Changeover
  • Low Ambient
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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 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

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1 Answer

Verry noisy defrost.Can you manually put into defrost


How old is the unit? Usually a high pitch sound in a motor is a dry bearing which eventually will cause the bearing to drag and cause the motor to draw high amps and overheat, some of your older motors have oilers on them that you can oil.
As for manually defrosting your unit, usually you can, by being very careful and opening the wire box cover, on the defrost board there should be two pins that say test, by shorting them together with a screwdriver and holding it for a few seconds it should initiate a defrost. the voltage across the test pins is very low, about 5 volts it won't hurt you or anything and it won't arch or spark.

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