Dispatched our Turlock CA area AC tech to a home goods store with an office unit not working. After checking in with the vendor log and store manager, our tech gained roof access. Found RTU 6 low on refrigerant charge, confirmed that a full leak search will need to be completed. Also inspected unit #5 while onsite, found that the smoke alarm was going off due to a failed disconnect. Bypassed the disconnect temporarily, tagging and marking system. Will need to quote replacement of #5's disconnect.