Performed A/C pm on (2) Ductless Heat Pump systems. Washed the filters. Checked the drains. Rinsed the condenser coils. Checked the electrical connections and safety’s. Tested both units in high heat and cooling. Small unit, heating- 122*, cooling- 57* Large unit, heating-107*, cooling-64*. With it not heating and cooling properly, it is an indication that it is low on refrigerant. Added 8oz R410a to the system. The large unit is operating properly. The blower wheel on the small unit is dirty. Recommend having the small indoor unit cleaned to help with airflow.