Ac max low and high psi at 35c?

[Nooblexus]

What is the max good AC low pressure and high pressure psi at 30 degrees Celsius?

should i rev the engines or on idle enough?


rx400h 2008


I Should not care about grams and cans, look at high and low pressures psi right?

[Herbie]

Are you talking about hybrid or not?

[NemesisUK]

25 minutes ago, Nooblexus said:

rx400h 2008

 

[Herbie]

7 minutes ago, NemesisUK said:

 

DOH!!! Ah well, today can only get better - cheers Peter

[Nooblexus]

low pressure 50 psi

high pressure 250 psi

@ 35C and revved up engine is ok?

[ColinBarber]

engine speed should be at 1,500 rpm (not that it should really matter as the engine doesn't run the AC).

Low pressure side:
0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm2, 21.3 to 35.5 psi)
High pressure side:
1.37 to 1.57 MPa (14 to 16 kgf/cm2, 199.1 to 227.5 psi)

[Nooblexus]

On 7/1/2023 at 5:31 PM, ColinBarber said:

engine speed should be at 1,500 rpm (not that it should really matter as the engine doesn't run the AC).

Low pressure side:
0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm2, 21.3 to 35.5 psi)
High pressure side:
1.37 to 1.57 MPa (14 to 16 kgf/cm2, 199.1 to 227.5 psi)

Are you sure at 30c low pressure is only 35.5 psi?

Too low?

Can you link me with a pdf chart please for rx400h?

[ColinBarber]

2 minutes ago, Nooblexus said:

Can you link me with a pdf chart please for rx400h?

You can pay for an hour's access to the official manuals here:

https://www.lexus-tech.eu/Menu/Repair

 

[Nooblexus]

Could somebody explain in detail what are these all mean?

 

R134a line especially interesting

Please explain what's up with that and how to use it

[Nooblexus]

Ouch

[DavidCM]

It looks like the red unit is pressurised to about 140psi.Should you really be playing with something you don't understand?

Read the instructions,before you injure someone,or even yourself.

[Nooblexus]

What is it mean? What's not working?

 

[Sixty]

You can find an explanation of low and high side pressure here [Link]

 

[cdmaskell]

Are these gauges oxy / acetylene on a welding set?  If they are, and you have no experience on using them,  please read all the relevant safety instructions on how to use/ adjust pressure. Extremely dangerous kit if you have no experience.  NB. 1 bar is 14.7 Pounds per square inch. Please be careful.

[Sixty]

2 minutes ago, cdmaskell said:

Are these gauges oxy / acetylene on a welding set?  …

The OP has posted in other threads regarding an A/C system, but agree about the need to be careful.

[Nooblexus]

2 hours ago, DavidCM said:

It looks like the red unit is pressurised to about 140psi.Should you really be playing with something you don't understand?

Read the instructions,before you injure someone,or even yourself.140 

10 bar is 140 psi

Good psi is 250 psi which is 17 bar

What is the problem?

I believe my compressor is dead

 

[Herbie]

3 minutes ago, Nooblexus said:

I believe my compressor is dead

Have you actually read the OBD codes to see if anything is flagged up?

[Nooblexus]

1 minute ago, Herbie said:

Have you actually read the OBD codes to see if anything is flagged up?

Nope, just got the cable, gotta install software somehow...

 

But good idea, will do that

2 hours ago, DavidCM said:

It looks like the red unit is pressurised to about 140psi.Should you really be playing with something you don't understand?

Read the instructions,before you injure someone,or even yourself.140 

10 bar is 140 psi

Good psi is 250 psi which is 17 bar

What is the problem?

I believe my compressor is dead

 

[Nooblexus]

For sure there is a leak. At 16 bar high pressure drops rapidly, tested by technician

[ColinBarber]

topics merged

[Nooblexus]

This buzz

https://youtu.be/FGb6T31Ya4w

 

https://youtube.com/shorts/p8WH4VK48g8?feature=share4