10 PREVENTIVE MAINTENANCE CHECKLIST
Source: DPN002953, Rev 2
Inspection Date Job Name
Indoor Unit Model # Indoor Unit Serial Number #
Condensing Unit Model # Condensing Unit Serial #
Room Temperature/Humidity °% Ambient Temperature °
Not all units will have all components. To determine your unit’s configuration, compare the Indoor Unit
Model # above and the information in the Components and Nomenclature section.
Good maintenance practices are essential to minimizing operation cost and maximizing product life. Read
and follow all applicable maintenance checks listed below. At a minimum, these checks should be
performed semi-annually. However, maintenance intervals may need to be more frequent based on site-
specific conditions. Review the unit user manual for further information on unit operation. We recommend
the use of trained and authorized service personnel, extended service contracts, and factory-certified
replacement parts. Contact your local sales representative for more details.
Check all that apply:
Evaporator/Filters
1. Check/Replace Filters
2. Grille Area Unrestricted
3. Wipe Section Clean
4. Coil Clean
5. Clean Condensate Pan
6. Clean Trap in Condensate Drain
7. Drain Connection/Lines Open, Leak Free and in Good Condition
8. Check/Test Filter Clog Switch Operation
9. Check/Test Condensate Drain Pan Float Switch Operation (If Equipped)
Blower Section (Direct Drive)
1. Impellers free of debris
2. Bearings in good condition
Blower Section (EC fan)
1. Mounting bolts tight
2. Fan-guard bolts tight
3. Impeller free of debris and spins freely
4. Check/Test air sail switch (if equipped)
5. Motor amp draw
• Compare to nameplate amps
#1 L1 L2 L3
Reheat (if equipped)
1. Inspect elements and check for corrosion
2. Check/Re-torque wire connections (inside reheat box)
3. Reheat amp draw
L1 L2 L3
10 Preventive Maintenance Checklist 47
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