What does Fujitsu error code E:03 mean?

E:03 on Fujitsu split systems indicates a fan motor fault on the indoor unit. The fan motor drive circuit has detected a fault — check fan motor winding resistance, bearing condition (spin manually), and the motor driver PCB for burnt components. Also check that the fan is not obstructed by foreign objects or ice from refrigerant leaks.

How do I read Fujitsu Airstage VRF fault codes?

Fujitsu Airstage VRF fault codes are displayed on the outdoor unit 7-segment LED display and on the indoor unit wired remote controller. For detailed system diagnostics, use the Fujitsu Airstage Service Tool (UT-XOBT3) connected via the outdoor unit service port. The service tool provides real-time operating data, fault history, and system configuration access.

What is Fujitsu error code E:17 and how do I fix it?

E:17 on Fujitsu Airstage split systems and VRF indoor units indicates an outdoor unit temperature sensor fault — specifically the outdoor ambient air temperature thermistor. Check the sensor wiring harness at the outdoor PCB connector, measure resistance at the current ambient temperature against the Fujitsu sensor resistance table, and replace the sensor if it is open or shorted.

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By Octavian Ghindea

Co-founder & CTO · Reviewed May 2026

What error codes does Fujitsu HVAC display?

E:03

Indoor fan motor fault — check motor and PCB

E:10

Communication fault — check wiring between units

Err 31

High discharge temperature fault

Err 11

High pressure protection

Common questions about Fujitsu HVAC equipment

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