4-2-19) Led Blinking Frequency Depending On Protecting Functions; Troubleshooting - Samsung RSG5D SERIES Service Manual

TROUBLESHOOTING

4-2-19) 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
If the same blinking, After 5 minutes, Follow the Remarks
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
SPM 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
second.
Motor Locked/Over RPM
3. Short the shunt resistor(R1) between leads.
4. Occur the huge change of input voltage in a momeent
5. Other cases, check the COMP, cycle, etc.
1. Drop the input voltage under AC 106V
Under Voltage
2. Short resistor R312(DC link resistor)
1. Increase the input voltage over AC 310V
Over Voltage
2. Short resistor among R309, R310 and R311(DC link
resistor)
87
Remarks
N/A