Samsung RB37A52N0SA [79/101] Troubleshooting

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 LED Blinking Frequency Remark

Normal Operation

N/A

Starting Failure

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.

SPM Fault

Position Sensing

Error

1. Check COMP wire connections (U,V,W)

2. Check PBA Bottom side soldering state

3. Other cases, check the COMP, cycle, etc.

Motor Locked /

Over RPM

1. Check PBA Bottom side soldering state.

2. Check Input voltage oscillation

3. Other cases, check the COMP, cycle, etc.

Under Voltage

1. Check input voltage

Normal Operating Voltage Range

(AC 220V ~ 240V)

2. Check PBA Bottom side soldering state.

Over Voltage

1. Check input voltage

Normal Operating Voltage Range

(AC 220V ~ 240V)

2. Check PBA Bottom side soldering state.

LED blinking frequency depending on protecting functions If the same blinking, After 5 minutes, Follow the Remarks.