Floor-mounted split systems code list
Family-scoped air-conditioner codes with the shortest useful meaning line for quick triage.
11
Serial communication error.
On supported floor-mounted systems, the official installation manual says the indoor unit shows errors by lamp blinking patterns during operation; some Fujitsu General remotes also have a service-check mode that can show a 2-digit code.
12
Wired remote controller communication error.
The official error table says faults appear as indoor-unit lamp blinking patterns during operation; on installations using a wired controller, the controller may also present an error indication.
24
Connection unit number error.
Officially shown through the indoor-unit error display pattern during operation; this code is tied to multi-unit system configuration rather than a simple single-unit user setting.
26
Indoor unit address setting error.
Shown in the official error table as an indoor-unit error display condition during operation.
41
Room temperature sensor error.
Shown by the indoor-unit error indication during operation in the official table.
42
Indoor unit heat exchanger middle temperature sensor error.
Presented in the official error table as an indoor-unit error indication during operation.