Question about Mitsubishi MSH09TW Air Conditioner

Outside unit not turning on

Inside unit turns on and lights start to flash timer and operation and outside unit does not turn on

5 Related Answers

Chandler Ede

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

Anonymous

81 Answers

SOURCE: inside unit turns on, outside doesn't

Could be a wiring problem or a lack of refrigerant. All you can do is professionally have the unit checked and serviced.
Hope this helps I take the time to answer your question so please rate me

Posted on Jun 28, 2010

D. Floyd Kolb

43501 Answers

SOURCE: mr. slim MSZ-GE15NA indoor unit

Hi,

There is either a problem with the outdoor unit fan or compressor or there is a communication problem between the two....

Did you check the number of blinks and then check the book to see what it means??...

Mitsubishi Air Conditioner Troubleshooting and Repair

heatman101

Posted on Dec 29, 2010

R Subramaniyam Iyer

2133 Answers

SOURCE: When unit is turned on

It's communication error between indoor and out door unit.

Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4

Posted on Jan 06, 2011

D. Floyd Kolb

43501 Answers

SOURCE: outside unit does not switch

Hi,
I assume you have tried to reset the power to the outdoor unit... this is the first step to torubleshooting your unit....
Turn the power off at the breaker or the outdoor disconnect for a few minutes and then reapply power... then try to restart the unit... this whole process willtake at least five minutes for it to restart...

If the left light begins to blink again it is showing that you have an abnormality somehwere.
You did not list a model number for your unit but here is the tech manual for one of the units that you may have that tells about the led blinking and what it means....

http://www.mitsubishipro.com/media/214635/ms-a09~12wa_service_manual_ob448c_10-17-08.pdf

Any of the other model tech literature can be found at www.mrslim.com

Of course if you have any more questions just comment back to me...

heatman101

Posted on Feb 05, 2011

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

0 Answers

Why is the timer light flashing on my air conditioner and air is not blowing niether inside nor outside?

Mar 25, 2016 | Dometic Heating & Cooling

1 Answer

Mr. Slim MS/MU24WN Continuous blinking operation light .The inside unit starts/runs. When the outside unit starts, it promptly shutsdown with the fan making only a few turns & inside unit stops.

Check inside unit see if 3 amp fuse blows then look outside see if thermostat wire going in unit is rubbing and shorting out

Aug 25, 2015 | Heating & Cooling

1 Answer

Hi there I have an r410a and the timer is flashing continuously if I turn the unit off outside ie reset it then it comes on for a few minutes then shuts down can you help please

brand and model number would help here. Flashy lights usually mean error codes. count the flashes or if it is flashing fast or slowly.

Jan 04, 2015 | Heating & Cooling

1 Answer

Inside unit on and outside does not turn on

There could be many problems with the outside unit (Condenser Unit). First let's start with the simple things. Check if there is the 240Volts coming from the quick disconnect box usually mounted on the wall near the unit. If you are not familiar with electricity then I strongly recommend that you get a professional electrician or air condition technician.

Once it is determined that there is the 240 volts then open the access panel on the condenser where the wiring goes into the unit. You will need a volt meter and check if that 240 Volts appears on the line side of the contactor. If so then go to the load side of the contactor. There should be no voltage there on the contacts because it has to be energized by the thermostat and the 24 Volt transformer. Once the contactor is energized there should then be the 240 Volts on the load side. If all of the voltages are present the outside unit should be working.

If you have done all of this and the outside fan is working but the compressor is not working then you could have a bad run capacitor. If the compressor is running but the fan is not then you could have a bad start capacitor. You should also check for any corroded wiring including on the terminals of the compressor and contactor.

Everything depends on troubleshooting and if your not familiar with any of this then I would have a qualified service technician take a look at it.

I wish you good luck but just remember that you are dealing with dangerous electrical voltage and if your not familiar with troubleshooting then leave it to the pros.

I hope that I have helped or at least given you some insight into what may be your problem/s. If so then if you would kindly post that I have helped I would appreciate it.

Marty G, retired Electrical Engineer

Mar 12, 2014 | Mitsubishi MSH09TW Air Conditioner

1 Answer

Why is Utilitech wall timer making lights flash?

You have connected white and red wires together.
White wire must be connected to neutral or to ground to operate timer mechanism, display and switching.
Copy following links to see correct wiring for Utilitec timers.
http://waterheatertimer.org/How-to-wire-timers.html
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Jul 30, 2012 | Hardware & Accessories

1 Answer

I have a double switch box controlling inside lights and outside lights. I installed a GE Smart Digital Timer (model 15086) to control the outside lights. In the wall box, the white wires are tied together...

From the description you gave on your post , sounds like you hooked the timer up correctly . Again , from the panel the hot ( black ) is jointed with the blacks feeding the inside switch and the timer correct ? And the Neutral ( white ) is jointed feeding the inside lights and timer for outside correct ? And from the timer ( GE model 15086 ) the Red Wire ( Switch Leg from timer ) is connected to the Black ( Switch Leg ) feeding the outside lights correct ? If this is exactly how you've wired your timer , then you have done your homework . Now all you need to do is make sure you have programed your timer correctly , and with your instructions that came with the timer , this should be no problem . If you continue to experience trouble , my suggestion would be to return the timer . It's not unheard of for some of these timers to come from the factory defective . This wiring configuration should not affect your inside lights . I hope this helps your home wiring project . I'm an electrician if that's any consolation !

Feb 09, 2011 | Hammering

2 Answers

My a airconditioner has both operation and timer flashing at the same time.there is no fan working on the outside unit there is no cold air coming inside.is this something to do with the control

I have one that the operation light flashes 7 times and the timer light flashes 2 times. Error code says Discharge pipe temperature error. Is there an easy fix?Thanks!!

Jan 19, 2011 | Fujitsu Heating & Cooling

1 Answer

My home air conditoning compresor doesn't always come on.

All timers are located on the main control board in the air handler " inside unit ". There is a circuit board in it near the heat strips and it has a couple of relays that are notorius for going out. Replace the board and the condenser unit " outside unit " should start to operate properly.

Jul 07, 2009 | Heating & Cooling

1 Answer