Error codes
HVAC in the field
Choose the brand and the code shown on the display. We give you the verified meaning, probable causes, and safe inspection steps.
Codes in the database for this brand:
Choose a brand and enter the code to see the diagnosis.
Title
Applies to
Violet chips are models confirmed in the manual; gray ones are the series/family where it applies.
What it means
Probable causes
Electrical hazard. Some steps require measurements with live voltage present. Trained personnel only, with proper PPE and tools. When in doubt, cut power at the panel.
Suggested inspection steps
Important: error codes vary by unit model and series. This information is for guidance only. Always check the service manual for the specific model before intervening.
Logging this fault?
Save the diagnosis to the equipment log and send it to your customer with Lissi.
Database updated Junio 2026 · Reference information in progress