Check power supply operation
Measure volts/amps of condenser fan motors
Check starters and contact surfaces
Check operating temperatures
Examine refrigerant charge
Check site-glasses
Check all belts
Inspect all safety controls
Check superheat and adjustment
Check hot gas by-pass controls
Inspect head pressure controls
Examine and tighten all electrical connections
Check compressor efficiency
Check cap tubes/piping for chafing
Look for oil/refrigerant leaks
Check fan sheaves for alignment and wear
Check fan-bearing supports
Examine motor supports
Check motor hold-down bolts
Check damper operations
Inspect damper linkages
Check damper motor
Clear drainage of any blockages
Replace air filters Quarterly
Clean Coils Annually
Inspect Economizer Annually
**Due to the location of the RTU, it can be hard to hear early warning signs. Ensure the system runs efficiently.
