E733-0001 means a fault is detected by the main controller PCB in the communication between the DC controller PCB and the main controller PCB.
Main cause: The connector has poor connection. The DC controller PCB is faulty.
Solution:
Verify the connection between the connector J1015 on the main controller PCB and the conductor J316 on the DC controlled PCB is normal.
Correct the connection if necessary.
The connection is correct: Replace the DC controller PCB.
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