Fujitsu Mini-Split Code 26
Soft lockoutShown as: OPERATION lamp blinks 2 times, TIMER lamp blinks 6 times, ECONOMY lamp blinking continuously
Address setting error in the wired remote controller system. Auto-set and manually-set controller addresses are mixed in one remote controller group, or the same address number is duplicated in one group.
Manual wording: “Address Setting Error in Wired Remote Controller System - When the address number set by auto setting & manual setting are mixed in on RC group.”
Documented for: RGLX, RL2/RLS3/RLB/RLXB, RLF/RLF1 with UTY-series wired remote controllers
Likely causes, most common first
- Wrong wiring connection within the remote controller group
- Auto address (00) and a manual address mixed in one remote controller group
- Duplicate remote controller addresses in one group
- Damaged indoor controller PCB
When to call a technician
Remote controller addressing is a commissioning setting done through the wall controller's service menus. Call the installing contractor.
A Fujitsu mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- 410A Mini-Split Troubleshooting Guide (Part # 6-26-FG2020 Rev. 5/2019) (Fujitsu General America, Inc., All R410A Halcyon mini-splits: RGLX, RL2/RLS3/RLS3H/RLS3Y/RLB/RLXB/RLXEH wall mounted, RLF/RLF1 multi-zone indoor units, RLXFZ multi-zone outdoor units, RML/RMLQ, RULX/RSLX universal-mount, RCLX cassettes) · checked 2026-08-25