Performed a maintenance inspection on 15 gas package units, 22 package heat pumps, 42 heat pumps, 5 mini splits, checked motor amps, capacitors, heat strips, burners, thermostats, cleared drain traps. Washed mini split filters. RTU 2.3 is void R22 (rm 605) OD fan motor is bad on HP 1.4, changed 2 bad belts on AH 1.4, 313. Installed supply vent in room 506B. Glued PVC drain line in boys rest room, Replaced 5uf cap on HP 1.5. Replaced 3A fuse on AH 108. Reset circuit board on condenser. Reset t-stat on rm 314.