====== Opening the outdoor unit ====== **Before anything else turn off the heat pump and then cut off the power from safety switch or from fuse.** If you install heat exchanger temperature sensor to the recommended position at *highest pipe*, only steps 1-7 (photos 1 and 2) needed. {{:en:opening_outdoor_unit.png?direct}} **Attach Heat Exchanger Temperature Sensor** to the highest pipe with two/three zip ties. {{:en:outdoor_unit_highest_pipe_20211101.jpg?400|}} **Outdoor Temperature Sensor** should be placed so it is covered, for example behind the outdoor unit {{:en:outdoor_temperature_sensor_behind_outdoor_unit.png?400|}} **Junction box** can be placed just under the outdoor unit. This gives you easy access. {{:en:outdoor_unit_junction_box_20211101.jpg?400|}}