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AC Compressor Fails to Start
I have three 18 year old carrier units. I was checking R22 pressures on all. Scrader valve apprarently stuck open and leaking on unit #3. The next day I found cooling fan running with compressor not running but bubbles comming out of scrader valve on suction line. I checked pressures on high an low side, both about 125. The next day I installed manifold gage and started unit. The suction started to drop and I open the R22 supply. Pressure dropped to about 80 when compressor stopped running. The fan kept running very slow. Checked 220 line and found lug on panel beaker melted away from buss bar. Replace mini 220 beaker with full size 220 breaker. When stating system the condensor fan runs slow until contactor closed by thermostat then fan runs full speed. The compressor tries to start but fail after 3 seconds. The system was running and cooling well before I tested the pressures. At least it was running better than the other two units. Here are my questions: 1. Is there a low level freon cutout switch shutting the compressor down? 2. Did a loss of freon and or oil cause the compressor to seize? 3. Did the faulty breaker cause the motor to sort-out or did a high current from low freon overload the breakers or both? 4. What do you recommend? Thanks for any advise, Randy -- Randy Roberts ------------------------------------------------------------------------ Randy Roberts's Profile: http://www.homeplot.com/member.php?userid=30 View this thread: http://www.homeplot.com/showthread.php?t=56394 |
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