Preventive maintenance is the best way to avoid unnecessary expense and inconvenience. Have this system inspected at regular intervals by a qualified service technician. The required frequency of inspections depends upon the total operating time and the indoor and outdoor environmental conditions.
Routine maintenance should cover the following items:
NOTE: Check each circuit’s refrigerant sightglass when the circuit is operating under steady-state, full load conditions at or above 70°F ambient. The sightglass should then be full and clear. If not, check for refrigerant leaks. A partially full sightglass is not uncommon at part load conditions. Do not use each circuit’s refrigerant sightglass to indicate proper charge The sightglass is to be used for moisture indication only.
The Daikin Applied Rooftop Airhandling Unit is an outdoor unit. However, the schedule may dictate storage either on the ground or in its final position at the site.
If the unit is stored on the ground, additional precautions should be taken as follows:
Source: MaintainX (Community Member)