Fujitsu Error Codes

Find troubleshooting guides for all Fujitsu error codes.

4 error codes across 1 appliance types

Minisplit

Code	Meaning	Severity
A1	A1 on a Fujitsu Halcyon mini-split means the indoor unit printed circuit board (PCB) has detected an internal fault. The control board manages all indoor unit functions including fan control, temperature sensing, and communication with the outdoor unit. high	high
HUB	Fujitsu Halcyon mini-split systems display single or double-letter fault codes on the indoor unit display when a component failure or sensor fault is detected. These codes help identify whether the issue is in the indoor unit, outdoor unit, or communication between the two. low	low
NOT-COOLING	Causes and Fixes medium	medium
NOT-HEATING	Causes and Fixes medium	medium