Working on a Macair refrigerated air dryer. Unit had a leak, so I patched it, changed TXV, filter dryer, and cleaned the coil. Now the compressor will turn on and run, but only for 30 seconds at times and 2 minutes at others. Pressures are staying within range. I changed out the Emerson Bulletin controller and a low pressure switch just to rule those out because I had some on hand. Everything appear to all be in check but the controller flashes the number 1 once per second meaning compressor ready to start when it drops out, but no alarms. Copeland digital compressor with 404a. Does anyone have any ideas to check?
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