Display shows E9; refrigerator may not cool and compressor may not start.

Safety first: Unplug the refrigerator before accessing the compressor compartment. Do not attempt sealed system work without proper certification.

Steps:

• Access compressor area: Remove the rear lower access panel to expose the compressor and any attached inverter module.
• Check connections: Inspect the harness from the main control to the inverter (if present) and from the inverter to the compressor. Reseat all connectors.
• Listen for operation: Restore power and listen for the compressor attempting to start (clicking, brief hum). If the compressor is silent and the fan runs, suspect the inverter or control.
• Basic electrical checks: Verify that the inverter is receiving line voltage from the main control when cooling is requested. This typically requires a wiring diagram and should be done only if you are comfortable with live voltage testing.

Corrective action: If the compressor windings test good (proper resistance between terminals) but the compressor does not run and the inverter is not outputting, replace the compressor inverter board. If you are not trained in sealed system diagnostics, contact a Viking-authorized technician.