LG mini split system fails communication between outdoor unit and branch box during pipe detection, showing error 204/205, and tech support has not yet resolved it.

No purpose-built diagnostic tool to quickly identify communication faults between outdoor unit and branch box in LG mini split systems; relying on manual wiring checks and unresponsive tech support.

Severity

4High

Willingness to Pay

implied

Added

May 15, 2026

Workarounds Described

manually checks wiring repeatedly
relies on tech support phone calls for help

Implied Software Gaps

Automated communication diagnostic tool for mini split systems that replaces manual wiring checks and waiting for tech support

App Concept

SplitCheck Pro

A mobile diagnostic app that connects to LG mini split systems via Bluetooth dongle to run automated communication tests between outdoor unit, branch box, and indoor zones. It pinpoints error 204/205 root causes (wiring, board, or configuration) and provides step-by-step fixes, reducing diagnostic time from hours to minutes.

Key Features

Bluetooth/wireless connection to outdoor unit and branch box
Automated communication loop test
Real-time error code lookup with probable causes
Wiring diagram overlay and continuity check guidance
Technician notes and history log

Target Users: HVAC technicians installing or servicing LG multi-zone mini split systems at residential or light commercial sites

Revenue Model: $14.99 one-time app purchase or $4.99 per diagnostic session

Existing Solutions Mentioned

Tech support (phone/email)

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