I'm a mostly residential Heating and A/C contractor. I'm in the northeast so A/C is only for a few months and not an everyday event. A fellow technician went on vacation and he asked me to help him if any service calls came in. Of course it was the hottest two days in this area with high humidity and I get slammed with other calls. Then I get a call from a Church. No A/C in the meeting area. So I take of to the call. The Air Handlers are running but only very warm air is coming out. I craw up the access stairs and just about fell back in due to poor setup at the top. Who approved this crap. Well that's for another thread. Checked obvoius things in the catwalk area. Filters are clean etc. I go back outside. It's now 105 heat index per the weather man. The uit will start every 10-15 minutes for about 3 seconds then stop. The fan won't get up to speed and the contactor de-energizes an both the fan and compressor stop. Refrigerent piping very hot. Checked the fan windings 3 phase 220 had 6 ohms accross all three windings. Now I don't work on Carrier very often and especially commercial. I'm licensed for Comm and Res. and had the schooling back in the 80's but I don't see them enough. I checked the Voltage coming in at all legs OK. Fuses O.K. Contactor getting full juice. But the fan and compressor would both only run for 3 seconds. I had other calls and they only use this area once this weekends so I turned the breaker off for the weekend. I returned today in the AM. Measured the winding again, hooked up gages. Turned unit on at breaker (outside) and the unit took off. The pressures were as follows Low Side at 36 deg. High side at 179psi 95 deg. WB 60 deg. OD amb 68 deg. SH 22 deg SC 15 deg. Inside cond 72 degrees. The ceiling is about 20 cathedral. Is there something I'm missing here? Unit still running. Looking for some answers as to why this unit would cycle on high pressure without the fan running. The contactor would pull in for 3 seconds the release. Shouldn't the fan be running even if its off on high pressure or low pressure? I advised the Property Manager to find a Carrier specialist since there are 10 units all Carrier and in different denominations. I'm just trying to get some insight here so I can truly back up my good friend when he's trying to get some Family time i that is way overdue.