Thermo king SL200-E not cooling

[andycarvey]

Hi, here's my problem


On start up low pressures drops to 1.5 bar and high pressure sits around 18 bar.
In the space of about 30 seconds the low pressure fluctuates to 2 bar then 2.5 bar then 3 bar and then quickly to 7 bar.


The high pressure remains fairly consistent.
When I turn off the cooler the low pressure slowly creeps up to around 5 bar in around 5 minutes and the high pressure drops to around 12 bar.
Any ideas or pointers would be gratefully recieved.
Thanks in advance
Andy

[cadwaladr]

do a pump down test,has it had good service history has the drier been changed,do the basics condensor clean belts not slipping,any alarms showing

[andycarvey]

Thanks for your reply......

The trailer was loaded so I will look further on Monday....
However there where no fault codes and the cooler continues to run without stopping.
It has been regularly maintained and fan belts and condenser look ok.
I'm fairly new to these kind of problems and will like you said perform a pump down test,
But do you thin it could also be a faulty expansion valve?

[cadwaladr]

maybe ,whats the ball doing on the reciever tank,drier problem

[cadwaladr]

just read your post again maybe a 3 way valve/check valve issue