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KSE53HRA Fault codes

Turn ac on inside unit starts up. After about 5 min inside power light flashes but outside unit does not start.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Therinnaiguy
  • 1420 Answers

SOURCE: no cooling after power out, indicator lights pattern not in manual

The Mitsubishi units have to be reset by turning off the indoor units by switching the remote or thermostat to off. Then turn off the breaker to the outside unit(s). After 30 seconds,turn on the breaker and then you can turn on the remote for cool. If no lights come on on the inside units, most likely you have blown a fuse soldered on the main PC board. At this point, call your technician. A goos tech will be able to wire in an in-line fuse holder so if it should happen again, you can easily replace the fuse. If you do see a light or two come on at the indoor unit but the outdoor unit does not start after 3 or 4 minutes, sounds like you will need to call a technician. Most likely you have a blown fuse on the main PC board of the outside unit. It is not an easy one to replace. Good Luck!

Posted on Sep 04, 2007

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  • 1 Answer

SOURCE: Ruud Achiever 90 Plus wont start

4 blinks is "pressure switch closed" there are 2 in the system according to the wiring diagram one for the vent system  and one for the drain system ... I just wiggled them and heard one "click" the fault light quit blinking and when I pushed the safety switch back in the furnace fired right up.  That being said is there a good website for learning how to maintain your own furnace?  I'll call a pro if I have to, but shoot I can fix a jet engine... this shouldn't be much worse.
Thanks  dan

Posted on Mar 10, 2008

  • 124 Answers

SOURCE: New airconditioner (installed 5 days

do nothing on a brand new unit but let the installer or service tech fix it for free, if you go messing with it you may camoflouge the real problem and when the repair tech arrives he wont be able to observe the actual cause or fault and it will do it again after hes gone and you'll be back to square one. please don't touch a thing till the tech arrives and gets the chance to see it broken and use his tools to determine the problem. good luck.

Posted on Dec 05, 2008

  • 3 Answers

SOURCE: TOYO TA-09CHS aircon problem

TOYO mini split air conditioner made in Japan is very very good quality and it can runs for 20 years without any problem. You didn't hire a best ac technician to install your TOYO unit. The tubing connection between indoor unit and outdoor unit is not the right torque and refrigerant leak. Your TOYO unit runs out of refrigerant. You need fix the leak and fully charge the system. You will solve the problem.

Posted on Apr 18, 2010

  • 3 Answers

SOURCE: Toyo Aircon. Starts perfectly. Runs

TOYO mini split air conditioner made in Japan is very very good quality and it can runs for 20 years without any problem. You didn't hire a best ac technician to install your TOYO unit. The tubing connection between indoor unit and outdoor unit is not the right torque and refrigerant leak. Your TOYO unit runs out of refrigerant. You need fix the leak and fully charge the system. You will solve the problem. Good luck!

Posted on Apr 18, 2010

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No cooling after power out, indicator lights pattern not in manual


The Mitsubishi units have to be reset by turning off the indoor units by switching the remote or thermostat to off. Then turn off the breaker to the outside unit(s). After 30 seconds,turn on the breaker and then you can turn on the remote for cool. If no lights come on on the inside units, most likely you have blown a fuse soldered on the main PC board. At this point, call your technician. A goos tech will be able to wire in an in-line fuse holder so if it should happen again, you can easily replace the fuse. If you do see a light or two come on at the indoor unit but the outdoor unit does not start after 3 or 4 minutes, sounds like you will need to call a technician. Most likely you have a blown fuse on the main PC board of the outside unit. It is not an easy one to replace. Good Luck!

Aug 31, 2007 | Mitsubishi MSH09TW Air Conditioner

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