Acson Aircon Error Codes & Blinking Lights

Search model-scoped Acson G18 / GS02 Inverter Y and APJ2 A5WMY10/15KR error-code rows from a manufacturer-authored service-guide copy hosted by third-party manual libraries.

Acson error code & blinking light lookup

Choose the reporting handset or model family before following a meaning. Shared displayed codes stay on one canonical page with separate sourced interpretations.

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74 matches

Browse all 45 Acson code pagesGrouped by model family. A code shared by several families keeps each family's meaning on one page.

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Acson error code & blinking light lookup

00Normal operationResult 1 of 2 with this code and meaning. Expand for model and series details.

U0Insufficient refrigerant

U2DC voltage is outside the permitted range

U4Communication error

U7Signal-transmission error on the outdoor-unit PCB

UAInstallation or system-combination error

UFIndoor/outdoor communication, piping, or wiring error

UHAnti-freeze function is active in another room

A1Indoor-unit PCB error

A3Water-pump error

A5Anti-freeze protection

A6Indoor fan-motor abnormality

C4Indoor heat-exchanger thermistor is open or shorted

C9Indoor room thermistor is open or shorted

E1Outdoor-unit PCB error

E3High-pressure protection

E4Low-pressure protection

E5Compressor motor lock

E6Compressor start-up error

E7Outdoor DC fan-motor lock

E8AC input overcurrent

E9Electronic expansion-valve error

EAFour-way valve error

F3Discharge-pipe overheat

F6Heat-exchanger overheat

H0Compressor sensor-system abnormality

H3High-pressure switch error

H6Position-sensor abnormality

H8AC current-sensor error

H9Outdoor-air thermistor is open or shorted

J1Pressure-sensor error

J3Compressor discharge-pipe thermistor is open, shorted, or misplaced

J5Suction-pipe thermistor is open or shorted

J6Outdoor heat exchanger (source description is incomplete)

J7Subcooling heat-exchanger thermistor is open or shorted

J8Liquid-pipe thermistor is open or shorted

J9Gas-pipe thermistor abnormality

LCCommunication error between the control PCB and inverter PCB

L1Outdoor-unit PCB error

L3Electrical-box temperature rise

L4Heat-sink overheat

L5IPM or IGBT error

L9Stall-prevention control

P1Open phase or voltage imbalance

P4Heat-sink thermistor is open or shorted

PJCapacity-setting error

00Normal operationResult 2 of 2 with this code and meaning. Expand for model and series details.

UAIndoor/outdoor unit combination fault

U0Refrigerant shortage

U2Voltage drop or main-circuit overvoltage

U4Transmission failure between the indoor and outdoor units

A1Indoor-unit PCB fault

A5High-pressure control or freeze-up protection

A6Indoor fan-motor fault

C4Heat-exchanger temperature-sensor fault

C9Suction-air temperature-sensor fault

EACooling/heating switching error

E1Outdoor-unit circuit-board fault

E5Outdoor overload protection is active (source label: OL started)

E6Compressor start-up fault

E7Outdoor DC fan-motor fault

E8Input overcurrent

F3High discharge-pipe temperature control

F6High-pressure control during cooling

H0Sensor fault

H6Operation fault caused by the position-detection sensor

H8DC current-sensor fault

H9Outdoor suction-air temperature-sensor fault

J3Discharge-pipe temperature-sensor fault

J6Heat-exchanger temperature-sensor fault

L3Electrical-parts overheat fault

L4Inverter heat-sink overheat

L5Output overcurrent

P4Inverter heat-sink temperature-sensor fault