74
TROUBLESHOOTING
4-2-10. 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.
LED blinking frequency depending on protecting functions
If the same blinking, After 5 minutes, Follow the Remarks
Blinking time is 1 second and dwell time is 2 seconds.
LED Blinking Frequency
Protecting
Functions
Remarks
Normal
Operation
N/A
Starting
Failure
1. 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 13.5V
4. Other cases, check the COMP, cycle, etc.
IPM Fault
Abnormal
Current
Detection
1. Open the COMP wire (CN102)
2. Bad condition of R1(ex. Bad soldering)
3. Other cases, check the COMP, cycle, etc.
Motor Locked
/ Over RPM
1. Operating the locked rotor COMP within 5
second.
2. Operating the COMP under 1,000 RPM more
than 5 second.
3. Occur the huge change of input voltage in a
moment.
4. Other cases, check the COMP, cycle, etc.
Under Voltage
1. Drop the input voltage under AC 53V
2. Short resistor R525 (DC link Resistor)
Over Voltage
1. Increase the input voltage over AC 155V
2. Short resistor among R522, R523 and R524 (DC
Link Resistor)
Communication Error
1. Check Terminal CN103
2. Short or Open resistor R210, R212
3. Short or Open harness between Main and
Inverter
