48 RT-SVX23D-EN
Maintenance
Monthly Maintenance
Before completing the following checks, turn the unit OFF and lock the main power disconnect
switch open.
WARNING
Rotating Components!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
Failure to disconnect power before servicing can cause severe personal injury or death.
Filters
• Inspect the return air filters. Clean or replace them if necessary. Refer to the unit Service Facts
for filter information.
Return Air Smoke Detector Maintenance
Airflow through the unit is affected by the amount of dirt and debris accumulated on the indoor coil
and filters. To insure that airflow through the unit is adequate for proper sampling by the return
air smoke detector, complete adherence to the maintenance procedures, including recommended
intervals between filter changes, and coil cleaning is required.
Periodic checks and maintenance procedures must be performed on the smoke detector to insure
that it will function properly. For detailed instructions concerning these checks and procedures,
refer to the appropriate section(s) of the smoke detector Installation and Maintenance Instructions
provided with the literature package for this unit.
Cooling Season
• Check the unit’s drain pans and condensate piping to ensure that there are no blockages.
• Inspect the evaporator and condenser coils for dirt, bent fins, etc. If the coils appear dirty, clean
them according to the instructions described in “Coil Cleaning” later in this section.
• Manually rotate the condenser fan(s) to ensure free movement and check motor bearings for
wear. Verify that all of the fan mounting hardware is tight.
• Inspect the F/A-R/A damper hinges and pins to ensure that all moving parts are securely
mounted. Keep the blades clean as necessary.
• Verify that all damper linkages move freely; lubricate with white grease, if necessary.
• Check supply fan motor bearings; repair or replace the motor as necessary.
• Check the fan shaft bearings for wear. Replace the bearings as necessary.
• Check the supply fan belt. If the belt is frayed or worn, replace it. Refer to the “Fan Belt
Adjustment” section for belt replacement and adjustments.
• Verify that all wire terminal connections are tight.
• Remove any corrosion present on the exterior surfaces of the unit and repaint these areas.
• Generally inspect the unit for unusual conditions (e.g., loose access panels, leaking piping
connections, etc.).
• Make sure that all retaining screws are reinstalled in the unit access panels once these checks
are complete.
• With the unit running, check and record the: ambient temperature; compressor suction and
discharge pressures (each circuit); superheat (each circuit);
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