Fault Codes / LG

44 codes

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• CH07 — Operation mode mismatch – all indoor units must be in same mode.
• CH11 — Drain pump error or float switch triggered.
• CH21 — DC peak (IPM fault). Possible compressor short.
• CH32 — High discharge pipe temperature detected.
• CH61 — High condenser temperature (check coils/fans).

Multi V / Split

• CH01 — Indoor air temperature sensor fault (open/short).
• CH02 — Inlet pipe sensor fault (open/short).
• CH03 — Wired remote controller ↔ indoor communication error.
• CH04 — Drain pump / float switch error.
• CH05 — Indoor/outdoor communication error — indoor unit stops.
• CH06 — Indoor coil (pipe) sensor fault.
• CH08 — Indoor fan motor (BLDC) error.
• CH09 — Indoor EEPROM error.
• CH10 — Discharge temperature over <val>130°C</val> (compressor protection).
• CH23 — Inverter DC voltage low.
• CH24 — High/low pressure switch trip (Multi V: high pressure).
• CH26 — Inverter compressor seized / position detection (startup).
• CH27 — Inverter current irregularity (reactor/PSC).
• CH28 — Inverter DC voltage too high.
• CH33 — Standard compressor discharge temperature too high (>105 °C).
• CH34 — High pressure too high (>35 bar at HP sensor).
• CH35 — Low pressure too low (<1 bar at LP sensor).
• CH40 — Inverter AC current abnormal (CT sensor).
• CH41 — Inverter compressor discharge sensor fault.
• CH42 — Low pressure sensor fault.
• CH43 — High pressure sensor fault.
• CH44 — Outdoor air temperature sensor fault.
• CH45 — Outdoor coil sensor fault.
• CH46 — Outdoor suction sensor fault.
• CH47 — Compressor discharge sensor fault.
• CH48 — Outdoor discharge/air sensor unplugged (Multi V: coil sensor).
• CH49 — Outdoor unit supply voltage fault.
• CH51 — Unit mismatch (capacity exceeded).
• CH52 — Communication inverter PCB ↔ main outdoor PCB fault.
• CH53 — Communication error indoor ↔ outdoor unit.
• CH54 — Reverse or open phase.

Multi V5

• CH17 — Hydro kit inlet pipe temperature sensor communication error. Outside air duct inlet pipe temperature sensor communication error.
• CH21 — Outdoor unit inverter board IPM fault error (Master: 211, Slave 1: 212, Slave 2: 213).
• CH22 — Outdoor unit AC inverter board input overcurrent (RMS) error (Master: 221, Slave 1: 222, Slave 2: 223).
• CH57 — Communication error between outdoor unit main PCB and inverter PCB (Master: 571, Slave 1: 572, Slave 2: 573).
• CH60 — Outdoor unit inverter PCB EEPROM error (Master: 601, Slave 1: 602, Slave 2: 603).
• CH62 — High temperature at the outdoor unit inverter PCB heat sink.
• CH67 — Outdoor unit fan has locked up (Master: 671, Slave 1: 672, Slave 2: 673).
• CH79 — Outdoor unit fan operation error (Master: 791, Slave 1: 792, Slave 2: 793).