Led Blinking Frequency Depending On Protecting Functions - Samsung RF28R7201 AA Series Service Manual

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
1. Short between COMP U,V, and W phase(CN04)
Starting 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
Current 2. Bad condition of R1(ex. Bad soldering.)
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 5
Motor Locked /
second.
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 Voltage
2. Short resistor among R309, R310 and R311.
(DC link resistor)
97
TROUBLESHOOTING
Remarks
N/A