PREVENTIVE MAINTENANCE SCHEDULE
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FREQUENCY OF MAINTENANCE, MONTHS
I T E M
Clean air filters & replace if required.
Clean evaporator coil, drain pan & drain line.
Clean condenser coil.
Lubricate blower motor/condenser motor.
Check/clean electrical connections, controls & control box.
Check motors, fans and blower bearings & lubricate it.
Check all electrical control components, wiring terminals etc. for spark,
overheating & loose connections. Replace/correct as necessary.
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/rubber pads. Repair/replace as necessary.
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- ad-
just 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-22 charging cylinder, belt tension checker, leak detector, vacuum pump with electronic gauges,
thermometer & hook type ammeter/voltmeter/ohmmeter.
CAUTION:
Disconnect power supply and allow all rotating parts to stop before servicing the unit.
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