Hitachi Compressor Fails to Start

Clicking or relay sounds but no cooling starts

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Faulty compressor, Faulty start capacitor (non‑inverter), Faulty outdoor PCB relay, Low supply voltage

Safety first: High voltage and stored energy in capacitors can be dangerous.

Steps:

Check supply voltage (qualified only): Ensure voltage is within specification.
Listen pattern: Repeated clicking without compressor start suggests start circuit or compressor issues.

Next steps: A technician should test compressor windings, capacitor (if present), and PCB relays, and replace faulty components.

Professional Required 5/5

Compressor / Start Capacitor / Outdoor PCB

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