Fujitsu AOU18RLXFZH 18,000 BTU Multi-Zone Mini Split System with Inverter Compressor 82 Error Fix: Outdoor Unit Trip

Error code 82 on the Fujitsu AOU18RLXFZH 18,000 BTU Multi-Zone Mini Split System with Inverter Compressor means: Outdoor Unit Trip. The outdoor unit has tripped on a general protection fault — this is a catch-all protection trip that doesn't fit a more specific category; the outdoor unit has shut down to protect itself; check for obvious issues: is the fan running, are there unusual noises, is ice buildup present; try a breaker reset after waiting 5 minutes; if the error recurs, read LED blink codes on the outdoor PCB for more specific diagnosis

The most successful fix is "Diagnose Outdoor Unit PCB and Fan Motor Faults" (hard difficulty, ~60 minutes). Estimated DIY cost: $0-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Diagnose Outdoor Unit PCB and Fan Motor Faults") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Insulated gloves.

DIY cost: $0-$20. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Fujitsu AOU18RLXFZH 18,000 BTU Multi-Zone Mini Split System with Inverter Compressor has 8 other known error codes, including: 01 (Indoor Unit PCB Error), 02 (Communication Error — Indoor to Outdoor Unit), 03 (Communication Error — Remote Controller to Indoor Unit), 04 (Outdoor Unit PCB Error), 05 (Outdoor DC Fan Motor Open/Short Circuit), and 3 more.

Error code 82 also appears on 8 other Fujitsu models: 12,000 BTU 18 SEER Slim Duct Mini Split, 8 in Height, Quiet Operation, 12,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with WiFi Control, 15,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with Energy Saving Mode, 24,000 BTU 19 SEER Wall-Mount Mini Split with Low Ambient Cooling, 36,000 BTU 18 SEER Multi-Zone Heat Pump Outdoor Unit, 48,000 BTU Multi-Zone Heat Pump Outdoor Unit, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.