Samsung RT53 Service Manual page 57

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TROUBLESHOOTING
LED blinking frequency depending on protecting functions(Inverter PBA)
* Self-Diagnosis Error Description
- When the Failure Condition occurs, the Compressor will immediately stop if the Compressor is running
and there will be a 5 minute standby. During the 5 minute standby, RPM signals will be ignored. That is,
even though the Inverter PBA receives the RPM signals, the Compressor does not work. It blinks every
second and there is 2 second off at the end of each cycle.
Protecting
Functions
Normal
Operation
Starting
Failure
IPM Fault
Motor Position
Error
Motor Position
Error
Low Voltage
Over Voltage
LED blinking frequency depending on protecting functions If the same blinking, After 5 minutes, Follow the
Remarks
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Remark
N/A
1. Short between COMP U,V, and W phase (CN102
2. Short among IC3 Pins (No. #1~24)
3. Drop the IPM operating Voltage under DC 13.5V
4. Other cases, check the COMP, cycle, etc.
1. Open the COMP wire (CN102)
2. Bad condition of resistor R1(ex. Bad soldering)
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 seconds.
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 AC106V. Short
resistor R514 (DC link resistor)
1. Increase the input voltage over AC 310V
2. Short resistor among R511, R512 and R513 (DC
Link resistor)
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