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6
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12
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PREVENTIVE MAINTENANCE SCHEDULE
FREQUENCY OF MAINTENANCE, MONTHS
I T E M
Clean air filters & replace if required.
Clean evaporator coil, drain pan & drain line.
Clean condenser coil.
Check blower belt/tension/wear/crack and replace it, if required.
Lubricate blower motor/condenser motor (if applicable).
Check alignment of pulleys.
Check/clean electrical connections, controls & control box.
Check motors, blower bearings & lubricate it.
Check all electrical control components, wiring terminals etc. for spark,
overheating & loose connections. Replace/correct as necessary.
Check all damper operation. Repair/replace as required.
Check insulation flanking. Repair/replace as required.
Check loose bolts/screws & tight as necessary.
Check for rusted/dented/damaged body parts & repair/repaint as necessary.
Check mountings (spring isolator/rubber pads). Repair/replace as necessary.
Check flexible canvas connections & duct work. Repair/replace as required.
Run test all motors and check the amperage, abnormality etc.
Run test compressors and check the amperage, noise, oil level, pressure
etc. and correct them accordingly.
Check the thermostat/control devices for correct operation, calibrate/
re-adjust as required.
Apply corrosion inhibitor/contact cleaner as required.
Check all pressures/temperatures as applicable and satisfy the operation &
performance.
NOTE
: Always observe for abnormal noise or vibration.
MAINTENANCE TOOLS/EQUIPMENT REQUIRED
STANDARD
: Screw drivers (Slot & Phillips), adjustable wrenches, pliers, refrigeration wrenches & socket set wrenches,
pulley puller, etc.
SPECIAL
: Manifold gauge set, R-134a charging cylinder, belt tension checker, leak detector, vacuum pump with
electronic gauges, thermometer & hook type ammeter/voltmeter/ohmmeter.
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