IBM i 830 Repair Manual page 281

Reference Description/Action Perform all actions before exchanging
Code Failing Items
69C6 Abnormal or unexpected HSL OptiConnect disconnection from
a remote system or partition.
The local system or partition disconnected from a remote
system or partition due to an unexpected event or failure. The
problem is most likely with the remote system or partition.
Intervention at the remote system is most likely required.
Examine both the local and remote HSL Opticonnected systems
or partitions for problems on this HSL loop.
Possible reasons include: A fatal error in software or hardware
in the remote system or partition or a power failure in the
remote system.
If there was not a complete HSL loop before this error occurred
then a failure or power down in an HSL component between
the local system or partition and the remote system or partition
could have caused this error. Check for a problem with: an HSL
cable, HSL I/O bridge or a power problem in an expansion I/O
tower or unit on this loop.
Examine the Service Action Log (SAL) on the local system or
partition for HSL failures on the same HSL loop at
approximately the same time this error occurred.
Examine the remote system or partition for problems. If the
remote system or partition is powered on and IPL'd then
examine the Service Action Log (SAL) on the remote system or
partition for problems on the same HSL loop at approximately
the same time this error occurred.
Correct any problems you find with the remote and local
systems or partitions that happened at approximately the same
time and involve HSL Opticonnect or HSL loop components or
Network Interface Controllers. When the remote system is
IPL'd it will automatically reconnect with this system or
partition.
If there are no problems with the remote system or partition
and there are no problems with the local system or partition
then collect all the Product Activity Log information for this
failure on both systems. Be sure to record all words in the SRC.
Contact your next level of support.
B6xx (including A6xx)
Failing Item Location
REM_SYS
Chapter 2. Unit Reference Codes
267