Samsung RS68N Series Service Manual page 90

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PRECAUTIONS(SAFETY WARNINGS)
4-5-8. LED blinking frequency depending on protecting functions
If Failure Condition is detected during compressor is operating, immediately stop Compressor
operating and stand by 5 minutes. During this 5 minutes, RPM command signal is not available.
It means, even if available RPM command signal is applied to the compressor, it does not work
and keep standing by.
Blinking time is 1 second and dwell time is 2 seconds.
LED Blinking Frequency
Protecting
Functions
Normal
Operation
Starting Failure 1. Short between COMP U,V and W Phase (CN102)
IPM Fault
Abnormal
Current
Detection
Motor Locked /
Over RPM
Under Voltage
Over Voltage
Communication
LED blinking frequency depending on protecting functions
If the same blinking, After 5 minutes, Follow the Remarks
2. Short among IPM Pins (No. #1 ~ 26)
3. Drop the IPM operating Voltage under DC 13.5V
4. Other cases, check the COMP, cycle, etc.
1. Open the COMP wire (CN102)
2. Bad condition of R1(ex. Bad soldering)
3. Other cases, check the COMP, cycle, etc.
1. Operating the locked rotor COMP within 5 second.
2. Operating the COMP under 1,000 RPM more than 5
second.
3. Occur the huge change of input voltage in a
moment.
4. Other cases, check the COMP, cycle, etc.
1. Drop the input voltage under AC 53V
2. Short resistor R525 (DC link Resistor)
1. Increase the input voltage over AC 155V
2. Short resistor among R522, R523 and R524 (DC Link
Resistor)
1. Check Terminal CN103
2. Short or Open resistor R210, R212
Error
3. Short or Open harness between Main and Inverter
90
Remarks
N/A