Samsung CH070EAMC, Service Manual

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Samsung Electronics
Troubleshooting
Remarks
1. Indoor unit error
(Display is unrelated
with operation)
2. Outdoor unit error
(Display is unrelated
with operation)
LED lamp display
Error type
Power reset
Error of temperature sensor
in the indoor unit (Open/Short)
Error of heat exchanger sensor
in the indoor unit
Error of the outdoor temperature sensor
Error of the condenser temperature sensor
Error of the discharge temperature sensor
1. No communication for 2 minutes between indoor units
(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)
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 6'th detection of freezing
Detection of the float switch
Error of setting option switches for optional accessories
EEPROM error
EEPROM option error
Concealed Type
Standard Type
Blue Red
: On : Flickering : Off
12-2-2 LED Display on the receiver & display unit
 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.

If you turn off the air conditioner when the LED is flickering, the LED is also turned off.

LED Display
12-4