Troubleshooting
Samsung Electronics 4-27
Indoor unit display
Symptom High Pressure Swich Error or High Pressure Switch Connector Open
Failure
Check Comp Preesure
Check the Connection of the CN003 on the MAIN-OUT PBA
(Error that only covers an outdoor unit capacity of 7.1 KW or less)
4-3-7 E407
E407 occurs
Check the Pressure of the Comp
And High Pressure Swich
(Nomal : Short / Fault : Open)
Yes
No
Is the CN003 connector of
MAIN PCB correctly Connected?
Re-operation after connecting
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