Circuit shuts down too soon

[stephen mendoza]

Hello, I have a Mc Quay unit that has two circuits on it.

Each circuit has two compressors on it, 6 stages of

cooling. My problem is that the #1 circuit trips out on me

and I have to turn the circuit off and on to reset it. The

coils are flushed out and the 2nd circuit comes on and off

no problem. My Pressures yesterday on the 1 circuit was

76 low and 200 high on a 77 degree day with only one

compressor running. With two compres. my press. are 63 low

and 235 high. Does anybody have any ideas? Thanks.

[mqfs_svr]

Check your airflow. If not that, what is your SH at full load on that circuit? Your shutting down on LP more that likely.

[enart9591]

What is the model of the machine?

Is it a chiller or DX?

What kinds of compressors and how many?

Need more info.

[stephen mendoza]

Hello, figured it out today. I had a guy find that the HP

switch was cutting it out. A bad switch. It is a little

low on freon. Sorry I didn't have that much info but

thanks for your help.