Samsung MH052FUEA Service Manual page 61

NJ LHXEA/MH
The error indicated on the LED display of Indoor unit
Abnormal conditions
Power reset
Error of temperature sensor in indoor unit(OPEN/SHORT)
Error of heat exchanger sensor in indoor unit
Error of heat exchanger OUT sensor in indoor unit
Error of outlet temperature sensor in indoor unit
(OPEN/SHORT): For heat pump models only
Error of mixed operation
Error of outdoor temperature sensor
Error of COND sensor
Error of DISCHARGE sensor
1. No communication for 2 minutes between indoor unit
and outdoor unit (communication error for more than
2 minutes)
2. Indoor unit receiving the communication error from
outdoor unit
3. Outdoor unit tracking 3 minutes error
4. When sending the communication error from outdoor
unit the mismatching of the communication numbers
and installed numbers after completion of tracking.
(communication error for more than 2 minutes)
Self-diagnostic error
(including the indoor unit not detected)
1. Error of electronic expansion valve close
2. Error of electronic expansion valve open
3. Breakaway of EVA OUT sensor
4. Breakaway of EVA IN sensor
5. Breakaway of COND MID sensor
6. 2 nd detection of refrigerant completely leak
7. 2 nd detection of high temperature COND
8. 2 nd detection of high temperature DISCHARGE
9. COMP DOWN due to 2nd detection of low pressure
switch
10. Error of reverse phase
11. Compressor down due to 6th detection of freezing
12. Self-diagnosis of condensation sensor (G8, G9)
13. Compressor down due to condensation ratio control
Error of float switch
Error of setting option switches for optional accessories
EEPROM error
EEPROM option error
: On : Flickering
If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
If you re-operate the air conditioner, it operates normally at first, then detect an error again.
Samsung Electronics
FUEA
: Off
Indicators
Concealed Type
Blue Red
Standard Type
Operating
Displayed on
appropriate indoor unit
which is operating
Displayed on
appropriate indoor unit
which is operating
Displayed on
appropriate indoor unit
which is operating
Displayed on outdoor
unit
1. Error of indoor unit :
Displayed on the
indoor unit regardless
of operation
2. Error of outdoor unit :
Displayed on the
indoor unit which is
operating
Displayed on
appropriate indoor unit
which is operating
Displayed on outdoor
unit
4-5