Carrier Supra 760 high pressure code diag and repair procedures
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- Опубліковано 24 чер 2021
- Got a call for a reefer unit that quit running and has a high pressure code active here’s a diy on understanding what that means and how to repair or bypass
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Thanks for always sharing solutions here
Thanks Boss appreciate that man!
Hello, great content. How much should discharge pressures fluctuate?
More power❤
my friend I have a question for you what is the high and low pressure what is the pis in supra 960,860,660 I will wait for your prompt response thanks
I do have the same issue. I’ve got the sensor in a dealership. How do you replace the sensor? I know there’s a high-pressure in there.
Those were always a back breaker. Good job
true that climbing up these things wear on ya
@@StickShiftRacing it is always nice to share knowledge. I try and share all I know to whoever listens.
Any instruction on how to change CDT sensor?
just bought a reefer truck with a carrier supra 760 on it and when I got up top to look at unit I noticed it had no top cover is the normal ? or is the cover missing.?
Is a good video tip!!
I'm already having about the same trouble with a supra 860!! I already replaced the discharge sensor pressure and the 3 way valve cause they were defective;but the alarm still showing up on the display!!! I already nade a by pass on the hi press sensor on the compressor!!! I can't realice what it coulde bw the reason!! someone could give me a hand with this problem??
What’s pressure rating on that mini pressure switch? reftech I see it’s 404a ref. We usually have a 450psi cutout on commercial building units
Have a High pressure sensor code on a thermo king v-520. I notice belt is loose andvthe unit goes on and off.....could the belt be throwing that code?
I have a 660 starter code. Unit does not at times. I can use power probe to start. I know starter is good. Need help.
Is there a alarm code AL5 for a carrier supra 860. Cant find nothing about it online. Unit wont even try to start just goes straight to alarm code buzzer when i turn the micro processor ( in cab control box) on.
Hey thanks for showing videos like this, helpful. I have a carrier supra 660 which keeps shutting down whether I come to a hard stop or the truck is turning. I've checked the display unit even replaced and ruled that out. Checked for frayed wires and taped some up but same. Belts are fine, oil etc. Also replaced the speed solenoid and fuel pump. My buddy told me it could be the oil pressure sensor so I bypassed that to test and now the unit shuts down more frequently and throws an alt aux code which I suspect is due to the bypass. Could that also be indicating that the alternator is bad. My buddy is also suggesting replacing the oil pump. Have taken it to the dealer but nothing yet. Any thoughts
Only way it will through an alternator code is if it’s not working via belt loose or alternator dead … looks like you’ve already diagnosed it good job now change that alternator
The alternator voltage truck off on the cab command is showing 13.5-6v is that about right or should it be higher? Truck on its 13.9v but that I guess is the reading from the truck itself
Thank you
Changed the alternator but the same issue, the voltage is slightly higher but it didn't fix the problem.
It seems I have the issue resolved. The alternator was under performing yes and was replaced. But I also saw that there were constant bubbles in the fuel pump from loose fittings and there was a short in one of the connectors inside the panel. Both of these were fixed and the issue I was having with the unit stalling and shutting down when I turned left and right, or when the vehicle stopped or took off. After fishing this the defrost when it ran was not completing and kept restarting. Cleaning the contacts on the switch solved that. Hope this helps someone. Thanks for the encouragement that lead to solving my issues.
Hey man i have a 750 supra .. is throwin hot engine code and shuts off i checked and that sensor you talked about is broken would that be part of this problem thank you for your time
yes check belt and coolant level
hey boss great video. Where can I write to you about a Carrier unit i am having trouble with its on a refeer.
my instagram is @stickshiftracing
Hey mate, thanks for posting these videos.
I have a carrier supra 750. Evaporator fans in the box are not working. The box has 2 evaporators, each with 3 fan motors And none of them are working.
The rest of the unit is operating correctly. No error codes. Any ideas?
check voltage to fans. if you are getting 12V and good ground then replace fans.
Hey Boss good video. Im having a Hi Press message coming on my supra 960. Paid to get an oil change, filled with freon and they "Tighten" a belt. Before I left tech said I can use a new fuel pump. Used about 10 times no problem... First tried to turn on but would get CNF1 TV message. Disconnected and reconnect fuel pump and started up. So I changed fuel pump but now im getting the HI PRESS message.. What do you think?
what’s your suction pressure
@@StickShiftRacing I will find out
I have a carrier transcold reefer unit and it says high discharge pressure I've cleaned the condenser and the fan is working the temp is up and down 338 up to 441 then it goes down to 320s
may have a discharge valve going bad
I have a thermoking 880s with the same issue, high discharge pressure but no other codes. Mechanic changed belts but now he said a relay on the circuit board is out. Is that related at all to the high discharge issue?
yes it’s a very good possibility
I have high discharge code changed hp switch change condenser fix break on the hp switch hardness and still the compressor wont engage
Whats up Boss I got a question? I did my reefer pre trip test on my unit and it failed because it says that I have a code P-195 low suction pressure can you give me some insight on what could I could do or check for.
it has a leak low suction pressure means it has run out of Freon find the leak repair and refill
I’m getting a Eng Hot code and my Reefer shuts off. I have the same unit. Any suggestions on what it could be?
Many reasons could be the issue first check the coolant level is it full? have you purged it? Is the belt on the water pump… that’s the belt on the front of the engine nearest the front of the truck. Is the thermostat ok? Any leaks? And lastly it’s got a blown head gasket
Could the unit being low on refrigerant also cause the unit to build high pressure? I’m talking 55psig suction and 425psig head pressure.
No high pressure can only come from faulty sensors, gate valves, or to much Freon
@@StickShiftRacing the reason I ask is because the oil sight glass is showing extremely low/empty, and the dead pressures are around 80psig on both sides. What do you think? Restriction?
@@coltonmoore1 it’s possible the switch is just bad if the sights aren’t floating then it’s empty
Dude, great video... I got a carrier supra 750...I want to plug it in when I'm not on the road... How do I get the specs to do this?? Please contact or help me...thanks..
need to give me a call during the day 6155688895
@@StickShiftRacing I'll call soon and thank u
@@StickShiftRacing it's Monday 11-22 here in Knightdale NC. Trying to contact you
@@thomasschuneman9394 call me
never mind just saw a video you had where the unit was open on top. that's crazy. how can that be good.. lol well I will see how it does. has 4000 hours on the unit and still runs . what's good hours for a unit like this. thanks
4000 ain’t bad I’ve had em run for 15k plus without major issues and yeah they don’t come with top covers they have to breath!
@@StickShiftRacing thanks
He man I have a question what it’s the alarm means check refrigerant system?
has no refrigerant
Hey I have a Supra 860 with the hi press readout. Had blown fuse for compressor unloaded. How do I check this? Belts are good
needs a unloader valve check if its magnatized
@@StickShiftRacing ok thanks my man
my 760 just had the high pressure came on and when I got up in the unit its belts are very loose not sure if that would cause the warning to come on, also I notice when I am am driving down the road no warning comes on, any ideas
yes if the compressor is slipping on the belt it will cause the issue
I have a carrier25 Utility 3000R Multi-Temp would code A17 be related to this and is there a way to bypass it?
no
@@StickShiftRacing Thanks bro, that sounds bad news for me.
Hi,can anybody tell me where is located it the glow plugs in a carrier reefer unit?im trying to replace them,my reefer unit is not starting...
on the intake manifold
System clk error code
So how can I solve this problem any idea
How do you clear the Freon??
Not understanding your question
@@StickShiftRacing The very first thing you said that it has too much Freon. How do you go about correcting that issue?
Greeting Sir. I got a frozen bread for some reason when I was empty my set tem was -10, aftet loaded i can't get down pass 1°F on my 7300x4. I didn't get no alarm. I take it to the shop, the tech told me it's running perfectly fine. I don't have any problem, refrigerant level fine. I'm confused to why the screen show i can't get to the set temperature?
air9170 hello. I am NOT a reefer tech. If your unit will not cool the trailer as it should, it can be because the weather is so hot that your condenser is overheating. You can try shutting unit off and spraying cool water on condenser to cool it off, then re-starting unit, see what happens. Good luck.
Hi my friend, I have a Supra 950 why is that all 4 fans are not working……?
check to see if you have power the check the fuse panel
check ground to the fans
Awesome thank you for the information
Have a question sir
lay it on me
My high pressure alarm came on for about 5 min but the reefer ran fine. Should I be worried?
Wash the condenser good with soap and a garden hose for a half hour.
@@markm0000 thanks I’ll try it!
@@phoenix6209 if that still happens check the belts they should have a little give but not flapping around while running. One of the fans might be going bad. I suggest taking it to a Carrier dealer.
Bro I am a owner operator and I would like to lear fix my reefer I spend lot of money on service can you help
carrier supra 850 nordic HI PRESS code was fixed with a new battery.
well thats a new one glad it worked
My unit run for about 3to5 mins shut off than I bush the switch ucome back on an repeat it shut of again
Help me please