Received a call that the second floor unit was locking out, on arrival I found the reset for compressor one was tripped. I reset it and cycled the unit, confirmed that the first Bank of compressors came on and continue to allow you to recovery. Checked operation for all the connector fan motors, the motors are working however I noticed that condenser fan contactor 1K8, which controls condenser fan motors number 282 and number 283 would disconnect during operation causing the unit head pressure to get excessively high which is then causing the compressor safety to trip. I went through all of the programming and ran it in manual test mode and found that it does work in manual test mode, however in automatic mode it is not pulling the contactor in when it is supposed to. This is more than likely a circuit board fault which would require a new main control board, to temporarily rectify the situation I linked condenser fan contact or 1K8 into the low voltage circuit of contactor 1K7.