Samsung RB31FEJNB Series Service Manual page 79

4. TROUBLESHOOTING
4-2-15) LED blinking frequency depending on protecting functions (Inverter PBA)
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.
Description
Normal Operation
Starting Failure
SPM Fault
Position Sensing
Error
Motor Locked /
Over RPM
Under Voltage
Over Voltage
LED blinking frequency depending on protecting functions If the same blinking, After 5 minutes, Follow the Remarks.
LED Blinking Frequency
N/A
1. Check the COMP terminals short (U,V,W)
2. Check IPM Pins short of Inverter PBA
3. Check IPM operating Voltage (under DC 13.5V)
4. Other cases, check the COMP, cycle, etc.
1. Check COMP wire connections (U,V,W)
2. Check PBA Bottom side soldering state
3. Other cases, check the COMP, cycle, etc.
1. Check PBA Bottom side soldering state.
2. Check Input voltage oscillation
3. Other cases, check the COMP, cycle, etc.
1. Check input voltage
Normal Operating Voltage Range
(AC 220V ~ 240V)
2. Check PBA Bottom side soldering state.
1. Check input voltage
Normal Operating Voltage Range
(AC 220V ~ 240V)
2. Check PBA Bottom side soldering state.
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Remark