Fault Codes / Fujitsu

58 codes

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• 11 — Communication error between indoor unit and remote controller.
• 41 — Room temperature sensor error.
• 42 — Indoor unit heat exchanger sensor error.
• 51 — Indoor unit fan motor error.
• 94 — Trip detection (overcurrent or inverter fault).
• 97 — Outdoor unit fan motor error.
• A1 — Discharge temperature 1 abnormal.

Airstage V-II

• 13.1 — Initial setting error (main PCB) (Error code 13.1).
• 14.1 — Communication error between outdoor units (Error code 14.1).
• 14.2 — Outdoor unit network communication 1 error (Error code 14.2).
• 14.5 — Outdoor unit network communication 2 error (Error code 14.5).
• 28.1 — Indoor unit number shortage (Error code 28.1).
• 28.4 — Auto address setting error (Error code 28.4).
• 5U.1 — Signal amplifier auto address setting error (Error code 5U.1).
• 61.5 — Outdoor unit reverse phase / missing phase wire error (Error code 61.5).
• 62.3 — Outdoor unit EEPROM access error (Error code 62.3).
• 62.6 — Inverter communication error (Error code 62.6).
• 62.8 — Outdoor unit EEPROM data error (Error code 62.8).
• 63.1 — Inverter error (Error code 63.1).
• 67.2 — Inverter PCB momentary power failure detection (Error code 67.2).
• 68.1 — Magnetic relay error (Error code 68.1).
• 68.2 — Rush current limiting resistor temp rise protection (Error code 68.2).
• 69.1 — Outdoor unit communication PCB parallel communication error (Error code 69.1).
• 71.1 — Discharge temp sensor 1 error (Error code 71.1).
• 71.2 — Discharge temp sensor 2 error (Error code 71.2).
• 72.1 — Compressor temp sensor 1 error (Error code 72.1).
• 72.2 — Compressor temp sensor 2 error (Error code 72.2).
• 73.3 — Outdoor unit heat exchanger liquid temp sensor error (Error code 73.3).
• 74.1 — Outdoor temp sensor error (Error code 74.1).
• 75.1 — Suction gas temp sensor error (Error code 75.1).
• 77.1 — Heat sink temp sensor error (Error code 77.1).
• 82.1 — Sub-cool heat ex. gas inlet temp sensor error (Error code 82.1).
• 82.2 — Sub-cool heat ex. gas outlet temp sensor error (Error code 82.2).
• 83.1 — Liquid pipe temp sensor 1 error (Error code 83.1).
• 83.2 — Liquid pipe temp sensor 2 error (Error code 83.2).
• 84.1 — Current sensor 1 error (Error code 84.1).
• 86.1 — Discharge pressure sensor error (Error code 86.1).
• 86.3 — Suction pressure sensor error (Error code 86.3).
• 86.4 — High pressure switch 1 error (Error code 86.4).
• 86.5 — High pressure switch 2 error (Error code 86.5).
• 92.1 — Compressor 2 error (Error code 92.1).
• 92.2 — Compressor 2 current value error (Error code 92.2).
• 93.1 — Inverter compressor start-up error (Error code 93.1).
• 94.1 — Trip detection (Error code 94.1).
• 95.5 — Compressor motor loss of synchronization (Error code 95.5).
• 97.1 — Outdoor unit fan motor lock error (Error code 97.1). [Code label corrected 2026-07-06 from 'E1:17' to the official value.]
• 97.4 — Outdoor unit fan motor undervoltage (Error code 97.4).
• 97.5 — Outdoor unit fan motor temperature abnormal (Error code 97.5).
• 9U.2 — Slave unit error (Error code 9U.2).
• A1.1 — Discharge temperature 1 abnormal (Error code A1.1).
• A2.1 — Discharge temperature 2 abnormal (Error code A2.1).
• A3.1 — Compressor 1 temperature abnormal (Error code A3.1) — sensor/protection fault, NOT refrigerant undercharge. [Code label corrected 2026-07-06 from 'E1:24' to the official value.]
• A3.2 — Compressor 2 temperature abnormal (Error code A3.2).
• A4.1 — High pressure abnormal (Error code A4.1).
• A4.2 — High pressure protection 1 (Error code A4.2).
• A4.3 — High pressure protection 2 (Error code A4.3).
• A5.1 — Low pressure abnormal (Error code A5.1).
• AC.4 — Heat sink temperature abnormal (Error code AC.4).