Samsung AVMKH020EA0 Service Manual page 273

8
Troubleshooting
8-3. Self-diagnosis by LED 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 minute 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 EVAP OUT sensor
4. Breakaway of EVAP IN sensor
5. Breakaway of COND MID sensor
6. 2nd detection of refrigerant completely leak
7. 2nd detection of high temperature COND
8. 2nd 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
- 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.
Indicators
Removing
Operation
frost
- 272 -
Remark
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
: On : Flickering : Off