If you did not include a model # XXXXX your question please do on you second reply if possible,this helps us serve you faster.
this is the code meaning,
SERIAL COMMUNICATION ERROR
The communication between the Central Control Unit (CCU) and the
Motor Control Unit (MCU) cannot be sent correctly.
Unplug washer or disconnect power.
Check wire harness connections to the MCU, the motor, and Central
Control Unit (CCU).
Check connections of the CCU board within the housing.
Make sure all grounding switches are engaged.
Check the drive system for any worn or failed components.
Plug in washer or reconnect power.
Verify CCU operation by running a Diagnostic Test or any cycle.
Check the MCU by looking for operations of the drive motor.
Check the drive motor for powered rotations.
Check that the serial harness at the MCU is not mounted upside
down. The wires should be to the left when facing the MCU
connectors. there is usually a service diagnostic tech sheet in the bottom front of the cabinet behind the panel under the door, if you can find it click this link,
. hope this helps, thanks Bryan