Troubleshooting
4-127 Samsung Electronics
▒ DVM+4 Large CHASSIS (RD140/160/180/200)
X Relevant Code: DB31-00558C/D
1. Motor Condition Inspection before Changing Motors
1) Take out the motor connector of the outdoor unit, and measure the resistance of each phase.
/PSNBM677886ƮFBDI
Faulty : Short (below 4Ω), Open (Cannot be measured)
2) Check Motor Sensor (hall sensor)
With the motor/motor sensor connector connected to the BLDC drive PBA, input the power and forcefully rotate the fan by hand to check the
voltage of the sensor connector terminal.
Normal : Voltage is moving up and down by 0~5V for each relation of Yellow-Black, Blue-Black and Orange-Black.
Faulty : Maintain constant voltage (5V or 0V)
3) Motor is normal if the motor resistance and motor sensor is normal. Therefore, change BLDC Drive PBA.
4) Change the motor if the motor still does not drive after changing the BLDC drive (cause unknown).
Separate motor connector Measure motor resistance
▒
DVM+4 Small chassis (RD080/100/120✳✳)
X Relevant Code: DB31-00330D
1. Motor Condition Inspection before Changing Motors
1) Take out the motor connector of the outdoor unit, and measure the resistance of each phase.
/PSNBM677886ƮFBDI
Faulty : Short (below 4Ω), Open (cannot be measured)
2) Check Motor Sensor (hall sensor)
With the motor/motor sensor connector connected to the BLDC drive PBA, input the power and forcefully rotate the fan by hand to
check the voltage of the sensor connector terminal.
Normal : Voltage is moving up and down by 0~5V for each relation of Yellow-Black, Blue-Black and Orange-Black.
Faulty: Maintain constant voltage (5V or 0V)
3) Motor is normal if the motor resistance and the motor sensor are normal. Therefore, change BLDC drive PBA.
4) Change the motor if the motor still does not drive after changing the BLDC drive (cause unknown).
Separate motor connector Measure motor resistance
Outdoor Unit FAN Motor RPM Error (cont.)
Motor Connector
Motor Sensor Connector
Motor Connector
Motor Sensor Connector
$9;&6+B$BaLQGG
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