Samsung NS Series User & Installation Manual page 36

Troubleshooting
f If an error occurs during the operation, an LED flickers and the operation is stopped except the LED.
f If you re-operate the air conditioner, it operates normally at first, then detect an error again.
LED Display on the receiver (Optional)
Abnormal conditions
Communication error between indoor units
1. Error of electronic expansion valve close
2. Error of electronic expansion valve open
3. 2'nd detection of high temperature cond
4. 2'nd detection of high temperature
discharge
5. Error of reverse phase
6. Compressor down due to 6th detection
of freezing
Detection of the float switch
Error of setting option switches for optional
accessories
EEPROM error
EEPROM option error
● On Flickering
f If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
36
Concealed Type
Green
Standard Type
Off
Indicators
Red
Remarks