Led Blinking Frequency Depending On Protecting Functions - Samsung RF4287HARS Service Manual

AW3 SM-EN 2011.3.31 2:56 PM 페이지96 in
TROUBLESHOOTING

4-2-15. 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
SPM Fault
Abnormal Current
Detection
Motor Locked /
Over RPM
Under Voltage
Over Voltage

LED blinking frequency depending on protecting functions

96
Remarks
N/A
1. Short between COMP U,V, and W phase(CN301)
2. Short among IPM Pins(No, #1~33)
3. Drop the IPM operating Voltage under DC 13.5V
4. Other cases, cjeck the COMP, cycle, etc.
1. Open the COMP wire(CN301)
2. Bad condition of R 308(ex. Bad soldering)
3. Other cases, cjeck the COMP, cycle, etc.
1. Operating the locked rotor COMP with in 5 second.
2. Operating the COMP under 1000RPM more than
5secod.
3. Short the shunt resistor between leads.
4. Occur the huge change of input voltage in a moment
5. Other cases, check the COMP, cycle,etc.
1. Drop the input voltage under AC 53V
2. Short resistor R513(DC link resistor)
1. Increase the input voltage over AC 154V
2. Short resistor among R501, R505 and R509
(DC link resistor)