Heat Pump Service and Maintenance
The heat pump manufacturer will provide the necessary operation and maintenance literature with the unit. This literature contains nontechnical instructions that the average homeowner can under- stand and follow with little or no difficulty. By following these instructions, the operational life span of the heat pump will be pro- longed, and it will operate at maximum efficiency.
Service and Maintenance Checklist
Warning
Turn off the electrical power to the heat pump at the disconnect switch before performing any maintenance.The heat pump may have multiple power supplies. Failure to disconnect the electrical power may result in damage to the equipment and a severe shock hazard.
1. Periodically inspect and clean (or replace) the air filters.
2. Inspect and clean the blower wheel, housing, and motor as required.
3. Annually lubricate blower motor on older heat pump models according to the manufacturer’s instructions. If the motor lacks lubricating oil, it will eventually burn out. Note: The blower motors in newer heat pumps are sealed and do not require lubrication.
4. Inspect fan motor and fan blades for wear or damage.
5. Inspect blower housing for lint and debris and clean as necessary.
6. Check for excessive frost buildup on the coils. Contact your local serviceperson if an excessive frost buildup is discovered.
7. Periodically clean the coils in the outdoor unit by washing with water hose.
8. Check condensation drain line during cooling season for free-flow condition. Water should flow freely.
9. Check the indoor coil drain pan and the primary and secondary drain lines.
10. Check all refrigerant line connections to make sure they are secure. Tighten loose connections. If the system is low on refrigerant, find and repair the leak before adding any more. Adding refrigerant to a leaking heat pump system will force the equipment to work harder and less efficiently. Continuing to operate a heat pump without refrigerant will eventually overheat the compressor and cause it to fail.
11. Inspect and clean (if required) the auxiliary drain pan (if sup- plied with the heat pump) and line.
12. Check for damaged wiring and loose connections.
13. Inspect outdoor unit and pad for proper level and adjust if necessary.
14. Monitor heat pump system for correct refrigerant charge.
15. Measure high- and low-side system pressures.
16. Remove dirt, leaves, and debris from inside the outdoor cabinet.
17. Inspect the base pan in the outdoor unit for restricted drain openings and correct as necessary.
18. Inspect the control box for wear and damage and repair as necessary. All control box and electrical parts should be checked for wear or damage.
19. Check condition of control box components, connections, and wiring.
20. Check the refrigeration system for leaks during each service call.