Preformed cooling maintenance on 3 systems and a mini split. Mini split was low on refrigerant. Customer declined charge up and leak detection. Tested start,p and run amps on all electrical components for the compressors and fan motors. Start amps on all 3 units were reading over manufacturer specifications and we are recommending a hard start kit for all 3. Capacitor for the guest house in the back was testing on the low side 42/45. Provided estimates for new capacitor. All other electrical components tested with manufacturer specifications. Changed filters for each return and dated. All the full systems were cooling upon departure. Mini split was left off.