Samsung AC071MN4PKH Service Manual page 92

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Troubleshooting
Gas leakage error(Error Code : E554) (Cont.)
Continue
Is service valve fully opened?
Is the indoor EVA sensor correctly connected?
Is refrigerant charged?
Replace the inverter PCB.
Yes
Yes
Yes
Yes
No
No
No
4-52
Open the valve.
Reconnect the sensor connector.
Charge the refrigerant.

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