Fujitsu Mini-Split Code 29
Soft lockoutShown as: OPERATION lamp blinks 2 times, TIMER lamp blinks 9 times, ECONOMY lamp blinking continuously
Connection unit number error. The number of indoor units connected in the remote controller group is outside the rule the control allows.
Manual wording: “Combination Unit Number Error - When the number of connecting indoor units are out of a specified rule.”
Documented for: RGLX, RL2/RLS3/RLB/RLXB, RLF/RLF1 with wired remote controllers
Likely causes, most common first
- Wrong number of indoor units wired into the group
- Damaged indoor unit controller PCB
When to call a technician
The unit count is set by field wiring and controller addressing. This has to be corrected by 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