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Warning: This document is a thorough technical and user-facing guide compiled from typical Daikin wall-mounted thermostat/remote controllers (model family BRC4M...) and common Daikin indoor unit features. For safety and warranty concerns, verify specifics with the label/serial number on your unit or official Daikin documentation for your exact model. This guide assumes the BRC4M150W is a wired wall controller for Daikin split/VRV systems (BRC4M family). Replace model-specific values with those on your hardware if they differ.