Service Manual SM-MDS_(ii) 79
Master unit and slave unit communication error
Error Code: FE (For MC301), ER63 (For MDS-M PCB)
Check the connection of
the communication wire.
Is it connected correctly?
Reconnect and restart the system
Is the communication
wire broken or loose?
Replace the wire and restart the
system
Is the DIP switch setting
on PCB correct?
Reset the setting and restart the
system
Swap the PCB between
Master and Slave unit. Is
the error follows the PCB?
Is the master and slave
unit PCB software version
same/compatible?
Replace the PCB / upgrade the
software version of the PCB