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System Maintenance
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6.0 SYSTEM MAINTENANCE
6.1 General Procedures
Periodic attention is necessary for continued satisfactory operation of your unit. Restricted air flow
through the condenser coil, reduced airflow from non-functioning fans and low refrigerant system
charge levels will reduce the operating efficiency of the unit and can result in high condensing tem-
peratures and loss of cooling. In winter, do not permit snow to accumulate around the sides or under-
neath the condenser coil.
Monthly and semi-annual inspections and maintenance are recommended for proper system opera-
tion. Use copies of 6.2.2 - Maintenance Inspection Checklist for each of these inspections.
If performance or operation problems are detected at anytime, refer to Table 9 - Troubleshooting
for required action.
!
WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power supplies before working in the unit. Use
voltmeter to make sure power is turned Off before making any electrical connections.
Unit contains lethal voltage in some circuits.
Only properly trained and qualified personnel may perform repair, maintenance and cleaning
operations.
The fans may start unexpectedly. Disconnect power supply before working on unit. Line side
of factory disconnect remains energized when disconnect is off. Use a voltmeter to make sure
power is turned off before checking any electrical connections or functions.
NOTE
When ordering replacement parts for equipment, it is necessary to specify unit model number,
serial number, and voltage. Please record those numbers in the spaces below.
• Model Number ____________________________________________________
• Serial Number ____________________________________________________
• Voltage/Phase/Frequency _________________________________________