If your indoor samsung air conditioning unit keep on blinking light, something is wrong. We recommend you check the error codes first. Some cases you can fix it on your own, not product detect but some cases you really have to contact HVAC expert because you don’t have the tools to fix it.
Samsung air conditioner blinking lights
Condition: Power reset
Condition: In the defrost operation
Condition: Error of the out door unit
Condition: Open or short circuit error of the indoor
Condition: Error of the fan in the indoor unit
Condition: Error of the second detection of the float switch
Condition: Open circuit error of the thermal fuse
Condition: Communication error between the indoor and outdoor units
Condition: Open or short circuit error of a sensor
Condition: EEPROM error
Samsung air conditioner error codes ( outdoor unit )

Samsung air conditioner error codes e121

Samsung air conditioner error codes e122

Samsung air conditioner error codes e154

Samsung air conditioner error codes e162

Samsung air conditioner error codes e202

Samsung air conditioner error codes e203
Communication error between outdoor unit

Samsung air conditioner error codes e221, e231, e251, e320
All these error codes indicate outdoor sensor error

Samsung air conditioner error codes e403
Compressor down due to freezing control

Samsung air conditioner error codes e425
Reverse phase / Loss phase detection

Samsung air conditioner error codes e458, e475
Both error codes indicate outdoor unit fan error

Samsung air conditioner error codes e461, e467
Compressor starting error / rotation error

Samsung air conditioner error codes e462, e484
Full current error / PFC over-current error

Samsung air conditioner error codes e464
IPM IPM (Over Current) error

Samsung air conditioner error codes e466, e483, e488
Error code e466 indicate DC LINK over-current / low-voltage error. Error code e483 indicate H/W DC Link Over Voltage Error. Error code e488 indicate AC Input Voltage Sensor Error

Samsung air conditioner error codes e554

Samsung air conditioner error codes e422

How to check samsung air conditioner error codes
If the air conditioning have problem and need troubleshooting, you will see the “test” icon on your remote control screen. Press the test button and the error codes will show