Carrier Ultra Xtc problem

Have you checked the oil pressure sensor. ..it will keep the engine from cranking. ...you will get that A35 code also......you can disconnect the sensor. ..if it then cranks....immediately plug it back in. ..the ecu will be looking for a closed circuit on that sensor.

 

Hi everyone I have a carrier unit with code 29 and 30 what could be my issue ???

 

Heat problem possible sv4 or sv1 valve failure. Run it in cool and see if the ball comes up in the sight glass on the reciever tank just to verify it's not low on freon. If ok check the wiring to the solenoid coils make sure they aren't off or broken

 

where can you find the manual? I’ve spent the day trying to figure out why this screen is locked up in the “start up flash”

 

Just Google it. I sold my trailer weeks ago. I looked in my phone for it but I must have deleted it

 

Google has it in PDF downloadable

 

I ended up buying a new control panel and everything was fine after that.

 

Glad you fixed it. I am thinking it was around $2000 is that correct?

 

@reeferwrencher i received an alarm P191CHECK UL2 UNLOADER this morning, what exactly is this code? Thanks

BTW the unit is a 2007 carrier ultra xtc