Commercial Heat Pump Annual Service Report

Annual inspection and service record for commercial heat pumps, covering reversing valve operation, defrost cycle performance, supplemental heat lockout, refrigerant charge verification by subcooling, discharge temperature, airflow, and safety/compliance checks.

Equipment Identification and Service Details

• Asset identification verified
  Record equipment tag number, location, manufacturer, model, and serial number.
• Service date and technician name recorded
  Document the date/time of service and the technician performing the inspection.
• Unit operating mode and ambient conditions recorded
  Note current operating mode, outdoor ambient temperature, and indoor return air conditions if available.
• Service access panels secured after inspection
  Verify all access panels, guards, and fasteners are reinstalled and secured.

Safety, Electrical, and Work Controls

• Lockout-tagout applied before service work
  Confirm energy isolation was performed in accordance with OSHA 1910.147 before opening electrical or mechanical compartments.
• Electrical disconnect and wiring condition acceptable
  Inspect disconnect, contactor area, terminal connections, and visible wiring for overheating, loose conductors, or damage.
• PPE used appropriate for task
  Select PPE used during service work.
• Work area safe and unobstructed
  Verify clear access around the unit, no trip hazards, and safe footing for service work.
• Safety labels and warning markings legible
  Confirm equipment warning labels, electrical hazard markings, and service instructions are visible and legible.

Airflow, Filters, and Coils

• Air filters clean and properly installed
  Inspect filters for loading, damage, and correct orientation; replace if required.
• Indoor and outdoor coils cleaned
  Verify evaporator and condenser coils are free of excessive dirt, debris, and blockage.
• Airflow across coil within acceptable range
  Record measured airflow if available and compare to equipment specifications.
• Blower assembly and belts condition acceptable
  Inspect blower wheel, motor mounts, and belts for wear, contamination, or abnormal condition.
• Condensate drain and pan clear
  Verify drain line is open, pan is clean, and no evidence of overflow or standing water is present.

Refrigeration Circuit and Heat Pump Operation

• Reversing valve operates correctly
  Verify the reversing valve shifts properly between heating and cooling modes without abnormal noise, delay, or leakage.
• Defrost cycle initiates and terminates properly
  Confirm defrost operation is functional and terminates normally based on control logic and observed system response.
• Supplemental heat lockout verified
  Confirm supplemental electric or auxiliary heat is locked out when outdoor conditions and control settings require it.
• Refrigerant charge verified by subcooling
  Record measured subcooling and compare to manufacturer target for the operating condition.
• Suction and discharge pressures recorded
  Document suction pressure, discharge pressure, and any notable instability in readings.
• Compressor and refrigerant piping condition acceptable
  Inspect for oil staining, vibration, abnormal noise, insulation damage, or signs of leakage.

Controls, Performance, and Final Verification

• Discharge air temperature measured
  Record discharge air temperature at the supply outlet during stable operation.
• Temperature split documented
  Record return air versus supply air temperature difference during steady operation.
• Thermostat and control sequence respond correctly
  Verify thermostat calls, staging, mode change, and control response are correct.
• Deficiencies and corrective actions documented
  List all deficiencies, non-conformances, repairs completed, and follow-up work required.
• Inspector signature
  Signature of the technician or inspector completing the annual service report.