Samsung AVXCSH023/032/040CE Service Manual page 111

Troubleshooting
4-2-1-6 Ceiling type
■ Error detection and reoperation
●
If an error occurs during the operation, an LED flickers and the operation is stopped except the LED.
●
If you re-operate the air conditioner, it operates normally at first, then detect an error again.
■ Indoor unit LED lamp display at error detecting
Error type
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 indoor fan motor:
Below 450RPM for 15 minutes
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 due to 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
4-27
LED lamp display
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 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
Samsung Electronics
: Off