25VNA4: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
* Monthly maintenance items and outdoor unit rinsing may be performed by the consumer. All other maintenance items and all service work must be performed by a qualified service technician. Read all waring labels.
Notes:
1. The above list may not include all maintenance items. Inspection intervals may vary depending on climate and operating hours. Consult your Carrier dealer about a service contract for seasonal inspections.
2. Do not use harsh chemicals or high pressure water on coils. More frequent rinsing is required for units near a sea coast.
Maintenance Checklist
Recommended
Interval*
Outdoor unit specific: Monthly Annual
Clear away debris and vegetation near unit. X
Inspect cabinet for damage. Replace components that are damaged or severely rusted. X
Inspect electrical disconnect for proper function. Repair or replace as necessary. X
Inspect electrical wiring and connections. Tighten loose connections. Inspect and perform functional test of equipment as needed to ensure
proper function. Repair or replace damaged or overheated components and wiring.
X
Check refrigerant system subcooling and/or superheat (system dependent). X
Inspect inside of unit. Clean if debris is present. X
Inspect condenser coil. Clean if dust, dirt, or debris is present. Rinse unit with fresh water (see Note 2). X
Inspect motor and fan for damage. Make sure fan spins freely. X
Indoor specific: (for fossil fuel furnaces and accessories, refer to unit specific literature)
Inspect, clean, or replace air filter if dirty. X
Inspect and clean blower assembly (includes blower housing, wheel, and motor). X
Inspect internal and external of cabinet. Clean as needed. X
Inspect electrical disconnect for proper function. Repair or replace as necessary. X
Inspect electrical components, wiring, and connections. Tighten loose connections. Repair or replace damaged components and wiring. X
Inspect evaporator coil. Clean if dust, dirt, or debris is present (see Note 2). X
Clean condensate pan, trap, and drain lines (more frequent maintenance may be required in humid climates - consult your local HVAC dealer). X
Inspect airflow system (ductwork). Check for leaks and repair as needed. X