12 PREVENTIVE MAINTENANCE CHECKLIST
Source: DPN003119, Rev 1
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 number 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:
1. Check coil clean and free of debris .
2. Check fans free of debris.
3. Fans securely mounted
4. Verify motor bearings in good condition.
5. Check all refrigerant lines for vibration isolation. Support as necessary.
6. Check/re-torque wire connections.
7. Check contactors for pitting (replace if pitted).
8. Check surge protection device status indicator lights (if equipped).
9. Verify operation sequence/setpoints.
10. Check refrigerant lines for signs of leaks/repair as found.
11. Charge verification:
a. Outdoor Ambient Temperature__________
b. Sub-cooling__________
c. Indoor Unit Return Air Temperature__________
d. Sight Glass Level (if Lee-Temp or pumped refrigerant)__________
12. Check motor amp draw
#1 L1 L2 L3
#2 L1 L2 L3
#3 L1 L2 L3
#4 L1 L2 L3
#5 L1 L2 L3
#6 L1 L2 L3
#7 L1 L2 L3
#8 L1 L2 L3
12 Preventive Maintenance Checklist
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