Samsung AC009BNLDCH Service Manual page 275

Gas leakage error (Error Code : E554) (Cont.)
Is indoor and outdoor unit wiring/piping
Is service valve fully opened?
sensor correctly connected?
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Continue
Yes
installed properly?
Yes
Yes
Is the indoor EVA
Yes
Is refrigerant charged?
Yes
Replace the inverter PCB.
No
Install again by following the standard specifications.
①
Piping
Wiring
No
Open the valve.
No
Reconnect the sensor connector.
No
Charge the refrigerant.
Troubleshooting
② ③
Bad installation
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