mr slim puh-3yk problem ?

[TCTBRAD]

Mitsubishi mr slim puh-3yk

a customer tells me they keep getting an f8 fault coming up on the contoller after the unit has run for a period of time on heating the the controller is turned off and on again the fault goes away for some time whenever i have been there to check it all looks to be running ok anyone know what the f8 fault is ? and possible causes ?

thankyou

[stufus]

It's probably P8
Have a look at this
http://www.digelair.net/pdfs/TECHLIT/MITSUBISHI/MrSlim_P-SERIES_Troubleshooting_TIPS.pdf
Cheers
Stu

[TCTBRAD]

thanks yeah turns out it was a p8 fault checked the fault history and it had been tripping on compressor thermal protection comp temp was about 96 degree c pressures looked fine no blockages must be something internal

[Paul a/c]

I had these on a 407c system .someone before had a leak on a flare they just recharged my adding more gas. Had to recaim all gas out because this was making compressor to run hot . A star with new 407c