Ductless mini-split indoor head mounted high on a wall

Mini-splits: blink-count codes vs remote-controller error query (Daikin, Mitsubishi Electric and others)

Mini-splits report faults three ways: blink counts on the indoor unit LEDs, a code on the indoor display, or a code you query with the remote or wall controller. The remote query often gives a precise code where the blinks only give a group. Daikin remotes reach it by holding the timer Cancel button until 00 flashes, then stepping until a continuous beep marks the stored code. Mitsubishi Electric remotes use a Check function that makes the receiver beep and flash the code. Meanings differ by brand, so never reuse another brand's table.

Cross-checked ~15 min easyBrands: Daikin, Mitsubishi Electric, Fujitsu, LG, Gree, Pioneer, MRCOOL

Before you start

Any refrigerant-circuit fault (low charge, leaks, compressor) is blocked: diagnose and refer to an EPA 608-certified technician
Outdoor unit boards carry high voltage and inverter capacitors stay charged after power-off; caution

Diagnostic steps

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