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Maintenance
109 Liebert
®
CRV
™
14.4 Inspect and Replace the Air Filter
Check the air filter monthly to maintain efficient air distribution through the evaporator coil.
1. Switch Off the CRV.
2. Open the rear panel by rotating the three locks with a screwdriver.
3. Wait until the fans stop rotating. When you open the first lock, you also open a safety switch that
cuts the input power; see Figure 96 below.
Figure 96 Air filter location and input power safety switch
Refrigerating Circuit
Check compressor noise/vibrations X
Check oil level through compressor sight glass X
Adjust/tighten compressor/functional elements X
Check sight glass for problem detection X
Check starting/running amps X
Check refrigerating circuit main pressures X
Check compressor suction superheat X
Check discharge temperature X
Check subcooling X
Air-Cooled
Condenser/Drycooler
(if applicable)
Check fan bearings X
Check fan motor mounts for tightness X
Check coil condition X
Check pipeline supports X
Check fan speed controller operation X
Water/Glycol Pump See manual for the pump
Table 28 Maintenance schedule
Component
Maintenance Period
Monthly
By User
Every
3 Months
Every
6 Months Annually
Safety
Switches
Safety Switch
Air Filter