Samsung Aircon Error Codes

Search any Samsung error code below. Each entry shows what the code means, how urgent it is, and what to do next — with notes specific to Singapore installations.

Error Code Lookup

Type a code or filter by fault type. Expand any row for full details. For LED blink patterns, see the Samsung diagnostic guide.

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Samsung Cases We've Diagnosed

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Samsung Aircon Error Codes

Error Code Lookup

E1Indoor room temperature sensor (thermistor) open or short circuit

E5Indoor unit pipe (heat exchanger) temperature sensor open or short circuit

E6Outdoor unit thermistor (ambient temperature sensor) error

E9Float switch open error - drain water level too high or float switch fault

EACommunication error between indoor and outdoor units

ECCommunication error between wired remote controller and indoor unit

EDOutdoor unit pipe (heat exchanger) temperature sensor error

CFFilter cleaning reminder (not an error - periodic maintenance alert)

CLDefrost mode indicator (not an error - normal heating cycle operation)

dFDefrost operation in progress (heating mode only)

E7Indoor fan motor error - fan not rotating or rotation speed abnormal

E1Indoor room thermistor error (sensor open/short circuit) - Mini Split multi-F series

101Indoor unit communication error (serial communication timeout)

121Indoor unit room temperature sensor open or short circuit fault

122Indoor unit heat exchanger (EVA-in) temperature sensor open or short fault

128Indoor unit heat exchanger (EVA-in) temperature sensor displacement/separation detected

221Outdoor unit ambient temperature sensor (TE) open or short circuit fault

237Outdoor condenser temperature sensor (TC) open or short circuit fault

251Inverter compressor discharge temperature sensor open or short circuit fault

461Inverter compressor starting failure or compressor does not start

462System stop due to primary current over-trip (compressor overcurrent protection)

464Inverter IPM (Intelligent Power Module) over-current fault

500Inverter IPM overheating fault - IPM heat sink temperature exceeded threshold

554Refrigerant gas full leakage detected by sensor (leak detection system)

556Outdoor unit capacity setup option error - indoor/outdoor unit capacity mismatch

153Indoor unit float switch 2nd detection - water overflow in drain pan (second trigger)

416Discharge temperature too high - compressor discharge pipe temperature exceeded limit

458Outdoor fan 1 motor error - fan rotation failure or speed abnormal

425Power cable misconnection error - L/N wiring of indoor unit is incorrect

460Communication wire misconnect - outdoor unit to indoor unit communication wire connected to power terminal

467Inverter compressor rotation error - compressor rotating but cannot maintain proper rotation

471Inverter EEPROM read/write error - stored parameter data loss or corruption

474Inverter heat sink temperature overheat error - inverter PCB heat sink too hot

484PFC (Power Factor Correction) overload or overcurrent error

485Inverter input current sensor open or short circuit fault

Samsung Cases We've Diagnosed