electronic expansion valve

[allstar08]

I love them. some have over 6,000 steps

[elheese]

Guessing you might have an electronic valve with a superheat controller. lets say its a sporlan for example. there is a sensor in the suction line, and both sensor and valve get wired back to controller somewhere. the controller needs to be looked at to see if sensor is reading correctly, and if it is set right. for many, you need a manual, and in some cases, a display module to troubleshoot issues. google the device or post it here, lots of guys know "how to deal with them".

thanks for you Is it any method to protect my compressor?
EEV IS CARL&i have thermestor &L.P tranceducer that sending a signal to controller and then ordering EEV

[allstar08]

You should call out a translator so we can understand what you are asking. My gut tells me you should not be messing with these units.

[jburchstead]

You really need to get a manual for the equipment you are working on. There are several different types of thermistors that will give you different values so you need to know which one you are working with. If you haven't done this already, google the equipment brand in the native language of where you think it was manufactured. Also be persistent with the people on site in finding the manuals that came with equipment. I have found them neatly filed away in the accounting department. Also check with the installing contractor.

[flange]

protect your compressor? yup, keep superheat in the suction gas. to do this, you will need to know how to work on your controller. Get the books and your instruments and work it out. if you dont have either, you got no shot at it.

[manny2326]

thanks for you Is it any method to protect my compressor?
EEV IS CARL&i have thermestor &L.P tranceducer that sending a signal to controller and then ordering EEV

no this is not to protect the compressor. This is for proper operation of the unit. I have worked on alot of units with electronic expanssion valves and normaly you have a temperature sensor on the suction line to calculate superheat along with the suction presure transducer. This is the main inputs that the exv uses to open or close. if your temperature sensors are off your exv will try to either close or open when it shouldnt depending if the temp sensors are reading to higher or lower than they should. Eventually you will get errors codes on the user interface. If you are 100% sure that your sensors are reading properly then you might have a bad exv which is not a comon thing. I would then suggest that you follow the proper troubleshooting steps to see if it is the valve or the output board controlling it.

[elheese]

protect your compressor? yup, keep superheat in the suction gas. to do this, you will need to know how to work on your controller. Get the books and your instruments and work it out. if you dont have either, you got no shot at it.

thank you