TIPS

1. Always turn power off before servicing.

2. Monitor compressor oil and oil cleanliness:
a. Change the oil according to manufacturer’s recommendations.
b. Use a high-quality oil and keep the level where it’s supposed to be.
c. Sample the oil every month.

3. Monitor condensate control:
a. Drain fluid traps regularly or automatically.
b. Drain receiving tanks regularly or automatically.
c. Service air-drying systems according to manufacturer’s recommendations.

4. Keep air inlet filters clean.

5. Keep motor belts tight.

6. Minimize system leaks.

Reference :
Website
http://www.eere.energy.gov/femp/techassist/operations_maintenance/technologies/ac/maintenance.cfm

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