Arrived on site to preform a one system maintenance. Indoor; checked filter and cleared drain line, checked electrical connections, amp draw and capacitance. Recommend installing secondary water safety switch. Outside; cleaned condenser coil and checked refrigerant pressures. Checked electrical connections, amp draw and capacitance on all motors. Recommend installing a compressor assist kit to the main unit and surge protection to both the main and the mini split units. Unit is operating within manufacture spec.