Weekly Maintenance

Check the Lubrication System

Mark the oil level on the res er v oi r sight glass, and obser v e th e level each week while the
machine is shut down.
If the level goes below the lower sight glass, the oil reclaim system will need to be checked
for proper operation. If add itional oil is required , add it through the oil drain c ha rging valve
(Figure 2A or Figure 2B). A pump is required for adding oil aga ins t refrigerant pressur e. The oil
charge is approxi mately 8 gallons (3 0 L). The added oi l

must

meet Carrier specificat ions for the
19XL. Refer to Changing Oil Filter and Oil Changes section s . Any ad ditional oil that is add ed
should be logge d by noting the am ount and date. An y oil that is adde d due to oil loss that is not
related to service will ev e ntually return to the sum p. It must be removed when the lev e l is high.
A 1200-watt oil heater is c ont rolled by the PIC to maintai n oil temperature (see th e Con trols
section) when the compressor is off. The LID Status0 2 table displays whether the heater is
energized or not. If the PIC s ho ws that the heater is energi zed, but the sump is not heat ing up,
the power to the oil heater may be off or the oil level may be too low. Che c k the oil level, the oil
heater contactor voltage, and oi l heater resist ance.
The PIC will not permit com pr es s o r start-up if the oil temper a ture is too low. The contro l will
continue with start-up only after the temperatu re is within limits.