CH05 and CH53 error codes Troubleshooting LG Comercial air conditioning

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LG Authorized Partner • Instarom Instalatii Romania: • Pascal Aristide street, no. 1, sector 3, Bucharest, Romania • https://www.instarom.com • LG's Error codes CH05 and CH53 - Communication error. • Check Point • 1. Check the input power AC230V. (Outdoor, Indoor unit) • 2. Check the communication wires are correctly connected. • → Adjust the connection of wire • → Confirm the wire of “Live”, “Neutral” • 3. Check the resistance between communication line and GND. (Normal : Over 2MΩ) • 4. Check the connector for communication is correctly • connected. • 5. Check the connection of GND1, GND2, and main GND. • 6. If one indoor unit is operated normally, outdoor PCB is no problem. • → Check the another indoor unit. • CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit. • LG offers a full range of air conditioning equipment for commercial use, cassette type, duct type, ceiling and floor convertible, console.

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