Fujitsu

Fujitsu General

1 field manuals · 17 error codes · 3 guides

Ask about a Fujitsu
Air Conditioner Model & serial

Fujitsu air conditioners

Manual · Air Conditioner

Ductless mini-split heat pump / AC: field service manual

Single- and multi-zone inverter ductless systems with wall-mount, ceiling cassette or slim-ducted indoor units. Code meanings are in the air-conditioner error code list; this manual covers concepts and safe electrical checks.

8 components6 common failuresMitsubishi Electric, Daikin, Fujitsu, LG, Pioneer, MrCool, Midea

Error codes

11 (Operation 1 / Timer 1 blinks) Serial communication error12 Wired remote communication error23 Indoor/outdoor combination error32 Indoor PCB memory error41 Indoor room thermistor fault42 Indoor coil thermistor error51 Indoor fan motor fault53 Drain error62 Outdoor main PCB memory error63 Inverter error71 Discharge thermistor error73 Outdoor coil thermistor error74 Outdoor ambient thermistor error94 Compressor overcurrent (trip det…97 Outdoor fan motor error99 Four-way valve errorA1 Discharge temperature too high
Guide · Air Conditioner

Mini-split indoor unit blinking light (reading the code)

A blinking pattern is a fault code. Count the blinks before you reset power, because a breaker reset erases the code. Then look it up for the brand and fix the cause.

4 steps ~30 minmoderate
Guide · Air Conditioner

Mini-split communication error: interconnect wiring check

Most communication faults are wiring: swapped terminals, loose screws, splices or damaged cable, often after a new install or a storm. Check power, then terminations at both ends, then the data signal, before replacing a board.

5 steps ~60 minadvanced

Identify a Fujitsu

Reading the model number

Not sourced.

Manufacture date from the serial number

Single source

No known date code in the serial; get the build date from Fujitsu service or its warranty lookup.

Single source.

Official Fujitsu manuals & support

Brand names identify appliances only. OnCall Tech is not affiliated with or endorsed by Fujitsu.