Question about Mitsubishi Mr. Slim MXZ30TN Air Conditioner

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P8 eroor code

Mitsubishi cassette type
in door unit (PLH-2.5KKB)
out door unit (PUH-2.5NKA)
1) Compressor is change but new compressor same capacity,
but not same model compressor.
2) unit Runing Amp. 18.6
3) Suction pressuer 60 psig.
4) Discharg pressure 290psig.
5) unit is not working properly ?
6) unit is stoped P8 eroor code ?

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  • 158 Answers

P8 error is abnormal pipe temperature indoor. If you are running it on heating P8 error will appear because the disc pressure is too high. It could be overcharged.

Posted on Jun 01, 2009

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2 Answers

What does error code p8 mean


P8 means Abnormality in outdoor unit.
Check:
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, helpful.

Feb 03, 2011 | Mitsubishi Heating & Cooling

2 Answers

We have a P8? CAN'T FIND MANAUL


P8-Abnormality in outdoor unit.
1.Wrong wiring of indoor/outdoor
connecting wire.......................Check the indoor/outdoor connecting wire.
2) Reversed phase......Change the connection of electric wiring.
3) Protection device is working........ Check the protection device.(LP,HP)
4) Damaged outdoor coil thermistor.....Measure the resistance of the outdoor coil thermistor.If the resistance is normal, replace the outdoor controller board.
5) Check out door coil is cleaned. If not do it.
thanks.

Jan 30, 2011 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

Hi, I have a goldStar GA 1866VHR split Airconditioner, (5050w cooling and 5040w heating capacity). Today I noticed that compressor/condenser unit was still running after I turned off the aircond: from the...


Thanks for your detailed information. But solution is very simple. The compressor contactor in out door unit. Struck. And hence, when you power on, without indoor commanding, the out door starts running.

Replace same type Contactor relay (In out door unit) immediately. Hope, it's helpful.

Jan 19, 2011 | Heating & Cooling

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

Amcoraire / aos241hx / code p8 / unit shut down will not restart


for all error codes. http://www.digelair.net/pdfs/TECHLIT/MITSUBISHI/MrSlim_P-SERIES_Troubleshooting_TIPS.pdf

Jun 30, 2009 | AmcorAire UCHW-H24AF2 Split System Air...

1 Answer

Error code E39 for Mitsubishi Heavy Industry Ceiling cassett type


E39 Fault is thermister, Mitsubishi way of saying im not going to start because there is something wrong. Generlly it is compressor fault or short of gas. Im guessing if you turned the power out. Waited twenty seconds, turn it back on. Now if you go to the outdoor part. Wait exactly 3 mins. If you hear the compressor try to start and fail then it would more then likely be your compressor if you dont hear anything and the unit faults out it will either be a board or short of gas.

Either way If the unit is under five years old get a warrenty agent out to look at it.

Sorry I couldnt tell you for sure but MHI are very vague when it comes to fault codes

Mar 03, 2009 | Mitsubishi Heating & Cooling

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