Use this NIBE service checklist to complete a thorough annual inspection of heat pump and hot water systems. Tasks include checking the casing, fan, air vents, and heat exchanger, inspecting for refrigerant leaks and damaged insulation, clearing drains, and examining water piping and pressure. Verify DHW tank condition, pump noise and vibration, and the operation of pressure relief valves. Review electrical isolators and cable terminations, immersion heater connections, PCB connectors, and thermal protectors. Confirm heating and hot water set points, controller time and day settings, external thermostat operation, and replace the air filter. Record any repairs required and comments.
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