Samsung RF23HT Series Service Manual

106TROUBLESHOOTING4-2-18. LED blinking frequency depending on protecting functionsIf Failure Condition is detected during compressor is operating, immediately stopCompressor operating and stand by 5 minutes. During this 5 minutes, RPM commandsignal is not available. It means, even if available RPM command signal is applied tothe compressor, it does not work and keep standing by.LED blinking frequency depending on protecting functionsIf the same blinking, After 5 minutes, Follow the RemarksBlinking time is 1 second and dwell time is 2 seconds.LED Blinking Frequency ProtectingFunctions RemarksNormalOperation N/AStartingFailure1. Short between COMP U,V and W Phase (CN102)2. Short among IPM Pins (No. #1 ~ 26)3. Drop the IPM operating Voltage under DC 13.5V4. Other cases, check the COMP, cycle, etc.IPM FaultAbnormalCurrentDetection1. Open the COMP wire (CN102)2. Bad condition of R1(ex. Bad soldering)3. Other cases, check the COMP, cycle, etc.MotorLocked /Over RPM1. Operating the locked rotor COMP within 5 second.2. Operating the COMP under 1,000 RPM more than5 second.3. Occur the huge change of input voltage in amoment.4. Other cases, check the COMP, cycle, etc.UnderVoltage1. Drop the input voltage under AC 53V2. Short resistor R525 (DC link Resistor)OverVoltage1. Increase the input voltage over AC 155V2. Short resistor among R522, R523 and R524 (DCLink Resistor)CommunicationError1. Check Terminal CN1032. Short or Open resistor R210, R2123. Short or Open harness between Main and Inverter