Samsung RF28HMEDBSR Service Manual page 101

4-2-16. 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
LED blinking frequency depending on protecting functions
Protecting
Functions
Normal
Operation
Starting 1. Short between COMP U,V, and W phase(CN04)
Failure
2. Short among IPM Pins(No. #1 ~ 26)
3. Drop the IPM operating Voltage under DC 13.5V
IPM Fault
4. Other cases, check the COMP, cycle, etc.
1. Open the COMP wire(CN04)
Abnormal
2. Bad condition of R1(ex. Bad soldering.)
Current
Detection
3. Other cases, check the COMP, cycle, etc.
1. Operating the locked rotor COMP within 5
second.
2. Operating the COMP under 1000 RPM more than
Motor
5 second.
Locked /
Over RPM
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
Under
Voltage 2. Short resistor R312(DC link resistor)
1. Increase the input voltage over AC 155V
Over
2. Short resistor among R309, R310 and R311(DC
Voltage
link resistor)
101
TROUBLESHOOTING
Remarks
N/A