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I have Mitsubishi Mr. Slim Model R410A and the outdoor unit is not working the fuse was burnt I changed the fusebit is still not working

Posted by Christine on

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2 Answers

Steve Kjr

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Could be several things causing the problem. You didn't say what size fuse you replaced. If you replaced the small fuse on the control board then you probably have a bad board.

If you replaced the fuse that provides 120/208 volts to the unit then either the compressor is bad, you may have a short in the power wiring or the fan motor is bad.

All three things can cause the fuse to blow.

Posted on Aug 27, 2014

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Christine Arcuri

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Thank you for all your great advice, my husband is a refrigeration tech and not familiar with this unit we will try all these tips. I will ask him what fuse he changed

Posted on Sep 03, 2014

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5 Related Answers

Anonymous

  • 6 Answers

SOURCE: no heating from Mr slim

P8 refers to outdoor protection device activation usually caused by low gas charge or blocked condenser coil. any good a/c company can resolve this for you. however please note that if it is gas related a pressure test must be carried out to determine where that potential leak may be and that can be very costly.

regards

Ed

Posted on Nov 14, 2007

francis rivero

  • 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

Anonymous

  • 128 Answers

SOURCE: Replacement compressor for Mitsubishi Mr. Slim Air Conditioner

pls no overhauling repair no spare part avaliable for hermetic comp[ressor the right is to change it

Posted on May 02, 2009

Anonymous

  • 1 Answer

SOURCE: Mitsubishi Mr slim Airconditioner error check P8

I Have same problem

Posted on Sep 28, 2009

SOURCE: I have a Mitsubishi Mr Slim model MSZ12UN. The

you must see the indoor fan and you must clean it very good as well all the indoor unit.

Posted on May 05, 2010

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Related Questions:

2 Answers

P8 showing on air cond and air con is not working


P8-Abnormality in outdoor unit.

Solution:
1) Check the indoor/outdoor connecting wire in proper point.
2) Change the connection of electric wiring, if reversed phase.
3) Check the protection device, if malfunction, replace it.
4) Measure the resistance of the outdoor coil thermistor.
If the resistance is normal, replace the
outdoor controller board
Thanks.

Feb 05, 2011 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

I have a Mitsubishi electric Mr Slimair conditioning. It runs a few minutes in cool mode, then it stops and an error of P8 code appears. When it runs, the fan is not strong.


P8-Abnormality in outdoor unit.
1) Wrong wiring of indoor/outdoor
connecting wire
2) Reversed phase
3) Protection device is working
4) Damaged outdoor coil thermistor

Solution:

1) Check the indoor/outdoor connecting wire.
2) Change the connection of electric wiring.
3) Check the protection device.
4) Measure the resistance of the outdoor coil thermistor.
If the resistance is normal, replace the
outdoor controller board.

Hope,it's helpful.

Jan 15, 2011 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

Its not working and flashing P6. Its a Mr Slim


dear sir/madam i think.... mr Slim A control R407c & R410a systems.
P6 = indoor coil frost protection in cooling or indoor coil overheat protection in heating.

Cooling
One of the 2 indoor coil sensors reads minus 15 deg C for 3 mins.
Heating
One of the indoor coil sensors reads over 70 deg C.

If you are sure the refrigerant charge is correct & system operation is correct then it could be a coil temperature sensor reading wrong temperature.
If you have one of those little monitor things which plug into the outdoor circuit board you can monitor the indoor coil temperature.
On later type remote controllers you can get all operating data like temp sensor data but you will need a service manual to do this.
Or you can measure the ohms resistance of the temp sensors & compare with the chart in the service manual. if you can do it by yourself do if not then contatct ot mitsubishi maintenance personnnel for furhter action, thank you hope answer the question please vote!

Sep 23, 2010 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

Mitsubishi Mr Slim mini split outdoor unit fan.


Check the capacitor. Rating must be within 90% of rated microfarads. If it is a dual capacitor test between C and FAN. Set your meter to read microfarads (uF).

Aug 13, 2009 | Mitsubishi Mr. Slim MXZ30TN Air...

3 Answers

Ac unit shuts down


See this document for P8 code on Mitsubishi Mr Slim MXZ30TN... It is likely you can get the fix just from following the diagnosis steps 1-7. http://www.digelair.net/pdfs/TECHLIT/MITSUBISHI/MrSlim_P-SERIES_Troubleshooting_TIPS.pdf

Jul 02, 2009 | Mitsubishi Mr. Slim MXZ30TN Air...

2 Answers

No heating from Mr slim


P8 refers to outdoor protection device activation usually caused by low gas charge or blocked condenser coil. any good a/c company can resolve this for you. however please note that if it is gas related a pressure test must be carried out to determine where that potential leak may be and that can be very costly.

regards

Ed

Nov 13, 2007 | Mitsubishi Mr. Slim MXZ30TN Air...

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