Today when I arrived I checked in with Scott. He was receiving an alert that rtu#3 was not functioning. I accessed the roof and located rtu#3. The unit was not functioning due to the integrated resettable fuse in the transformer, the fuse was reset and the system was operated. The blower motor contactor was chattering intermittently. I checked the control side of the unit and discovered that the contactor for compressor #1 was pulling the voltage down. In addition to this compressor #2 contactor was also in really bad condition. Replaced both of these after tracing voltages and amp draws through the low voltage components. The system returned to operation after the repairs and the blower motor contactor quit chattering. The amp draw at the 24v side of the transformer dropped to 0.98 amps during first stage cooling. I also discussed with Scott that the outdoor fan relay was also in poor condition. I will be addressing this with Sherry when she returns from vacation. Thank