Question about Mitsubishi Mr. Slim MXZ30TN Air Conditioner

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I am currently operating a MSYD36NA / MUYD36NA Mitsubishi Mr. Slim 34,600 BTU 15.1 SEER Single Zone Ductless Mini Split Air Conditioner. Has been operating for the past 2 months with no issues. It was installed by a profession on a dedicated 30amp circuit (i should note that the breakers are approximately 25 years old) Today while the unit was operating the circuit breaker popped. I went to the fuse box and reset it and within 1 minute had popped again. I reset it once more and the breaker stayed on. After returning to the unit it was obvious that the outside unit was not functioning but the indoor unit was. I turned the breaker off for 1 hour and turned it back on and it was still the same thing. Indoor unit was running (not cold) outdoor unit was dead. I opened up the electrical panel on the outdoor unit and could hear a faint buzz (not sure if this is normal or not). I turned off the breaker so that I could examine. I figured that it was possible that a fuse inside the unit had failed. Sure enough I found a burned out fuse labeled T2A /250 V. The fuse looked smokey on the inside. I have removed the fuse and plan to replace it. The unit is less than one year ago from acwholesalers.com and has only been installed for approximately 6 weeks. Was functioning perfectly up until now for about 10 hour per day. ***UPDATE: I have replaced the 30amp circuit breaker with a new one and replaced the fuse with an F2A/250 V (old one was T2A/250 V) and the outdoor unit will still not function Looking for advice on how to fix this. Thank you Service manual can be located here: https://www.acwholesalers.com/v/vspfiles/assets/images/MUY-D36NA%20Service%20Manual.pdf

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

burzerko
  • 254 Answers

SOURCE: mr slim 12,000 btu 110 volt

Sounds to me like yo have dirty condenser coils (outside unit) After this runs and gets hot it loads the compressor because it can not release heat out of the condenser coil it also may have a restriction somewhere on the high side that could cause this maybe in a txv or in a line filter.

Hope this helps Ya
please rate me

Posted on Jul 20, 2008

  • 958 Answers

SOURCE: Mitsubishi Mr. Slim Mini Split MS-A12WA Indoor Unit

no sir gary,

the water would not go to the drain pan if you install it vertically.

water would just drop anywhere and would ruin a lot of things...
'

tnx 4 using fixya,

drcool

Posted on Sep 13, 2008

james3751
  • 614 Answers

SOURCE: Mitsubishi Mini Split sytems fails to operature

I will contact you later today with diagnostic data. Russ

Posted on Aug 01, 2009

hvac1960
  • 2133 Answers

SOURCE: I have a Mitsubishi electric

Please check your indoor motor's mechanism is faulty. Or capacitor(condenser) of fan motor is weak. Replace it.

Posted on Dec 17, 2010

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