Samsung AC009BNLDCH Service Manual page 277

Others (Cont.)
14. OLP overHeating and compressor stop : E463
- Check the opening of the sub valve.
- Check the amount of the cooling water.
- Check the OLP sensor.
15. Current sensor error : E468
- Check the EEPROM data.
- Check the PCB operation.
16. IPM (IGBT Module) or PFCM temperature sensor error : E474
IPM overheat error for outdoor unit inverter compressor : E500
- Check whether IPM is correctly assembled on the heatproof plate.
- Check whether the inlet is blockage.
- If there is a defect, replace the IPM.
17. How to check Booster Fan
1) In case of do not not operate 1 Booster Fan
Action method : Remove the Booster Fan connector wire and cross-assembling the another Booster Fan wire and
then horizontally or intermediate or swing operate.
Type ① : When the existing Booster Fan does not operate, replace the Booster Fan.
Type ② : If type ① is not defective, Booster Fan Wire 4 (Blue Wire), 3 (Black Wire) pin voltage :
When it is more than 2.7V, replace the PCB.
Samsung Electronics
If it doesn't operate, If it doesn't operate,
replace other replace other
Booster fan Booster fan
PIN No.1 : VCC (YELLOW/+)
4 3 2 1 4 3 2 1
PIN No.2 : SIGNAL (WHITE)
PIN No.3 : GROUND (BLACK/-)
PIN No.4 : PWM (BLUE)
Troubleshooting
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