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CHECK THE INSTALLATION STATUS
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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 depending on protecting functions.
LED Blinking Frequency
Protecting
Functions
Remarks
Normal
Operation
N/A
Starting Failure
1. Short between COMP U,V, and W phase(CN04)
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.
SPM Fault
Abnormal
Current Detection
1. Open the COMP wire(CN04)
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 1000 RPM more than 5second.
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 R312(DC link resistor)
Over Voltage
1. Increase the input voltage over AC 155V
2. Short resistor among R309, R310 and R311 (DC link resistor)
Communication
error
1. Main – Inverter communication error
IPM Shut Down
1. Check IPM, PBA case, Compressor Temperature
2. If IPM or Discrete IC Temperature 120℃ over, blinking LED
6-11) LED blinking frequency depending on protecting functions
