Fujitsu · Heat pump

32 Indoor main PCB error (EEPROM / model info)

Medium severity Fujitsu ductless split/multi/VRF (general code list)Fujitsu wall-mounted 7-15 (NA ASU/AOU type)Fujitsu slim duct ARU 7-18 (LL type)

What the control is telling you

At power-up the indoor board cannot read its EEPROM or the model data is wrong. Indoor lamps: OPERATION (green) flashes 3x, TIMER (orange) flashes 2x, ECONOMY (green) flashes fast nonstop; wired remote shows 32.

Applies to: Fujitsu ductless heat pumps: Fujitsu ductless split/multi/VRF (general code list), Fujitsu wall-mounted 7-15 (NA ASU/AOU type), Fujitsu slim duct ARU 7-18 (LL type)

Likely causes

Electrical noise
Bad connector or corrosion on the board
Indoor main PCB failure

Test and repair steps

Reset power and run; if it clears, look for outside noise and ground problems.
Check every connector on the indoor board and look for shorts, moisture or corrosion.
Replace the indoor main PCB if it returns.

Settings for these units

Operating range and service space · Fujitsu multi-zone outdoor 18/24 type

Other codes on the same units

26 Indoor unit address setting error
27 Primary / secondary unit setup error
29 Connection unit number error (wired remote system)
31 Power supply interruption error
33 Indoor fan motor power consumption error
35 MANUAL AUTO button error
39 Indoor fan motor power supply error
41 Room (intake air) temperature sensor error

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Source: Fujitsu All Fujitsu split - multi - VRF (generic code list) codes.pdf - section error code table (indoor LED flashes); Fujitsu Wall-mounted 7-9-12-15 (North American trilingual, UTY-RNNUM remotes; e.g. ASU9-12-15 RLF1-RLS familie.pdf - section 14 Error codes; Fujitsu Wall-mounted KMCG (ASEH-AOEH 07-14) - Fujitsu UK; same error-code scheme as NA ASU-AOU units service S.pdf - section 3 Troubleshooting, 2 Troubleshooting with error code; Fujitsu Slim duct AR07-09-12-14-18 (ARU-ARYG LL-type equivalent) installation P-N 9381858064.pdf - section 14 Error codes. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.