ULNZ3
For
use
by
authorized
service
providers.
The
problem
may
be
a
communications
line
problem.
When
a
workstation
is
attached
to
the
system
through
modems,
it
may
fail
or
lose
communication
with
the
system
for
various
lengths
of
time.
This
is
due
to
a
communications
line
problem.
Refer
to
the
modem
service
information
to
determine
how
to
test
the
modems
and
verify
that
the
communications
line
between
the
modems
is
working
correctly.
ULNZ4
For
use
by
authorized
service
providers.
Independent
workstation
and
SDLC
support.
The
system
considers
an
independent
workstation
to
be
an
attached
remote
system
when
it
is
attached
using
PC
Support
asynchronous
communications
on
an
ASCII
workstation
controller.
Perform
the
following:
v
See
the
ASCII
Work
Station
Reference
,
SA41-3130-00
information
for
instructions
on
how
to
verify
that
the
remote
system
(independent
workstation)
that
is
attached
to
the
failing
port
is
a
supported
device.
v
See
the
device
hardware
maintenance
and
service
information
for
instructions
on
how
to
verify
that
the
device
is
working
correctly.
UNP20
For
use
by
authorized
service
providers.
The
internal
code
of
the
I/O
card
that
detected
the
error
may
be
defective.
Perform
the
following:
1.
Replace
the
suspected
card.
2.
If
the
failure
occurs
again,
contact
your
next
level
of
support
and
report
the
problem.
This
ends
the
procedure.
UPLF1
For
use
by
authorized
service
providers.
The
system
may
not
have
been
able
to
complete
the
APPN
session
initiation
due
to
the
number
of
jobs
that
were
active
when
the
timeout
occurred.
The
timeout
condition
could
have
been
caused
by
a
system
performance
problem.
System
performance
could
be
impacted
by
the
capacity
of
the
system.
System
performance
can
also
be
impacted
by
processing
requests
from
other
systems
in
the
network.
For
capacity
planning
and
system
performance
information,
refer
to
LPS:
Performance
Tools
for
AS/400
,
GC41-5055-00.
UPSUNIT
For
use
by
authorized
service
providers.
The
uninterruptible
power
supply
(UPS)
may
be
the
failing
component.
The
air
moving
device
(AMD)
in
the
UPS
will
be
stopped
when
the
UPS
is
not
running
on
batteries
or
is
charging
the
batteries
on
an
FC
5033,
FC
5034,
or
FC
5035.
476
iSeries:
iSeries
Server
270,
800,
810,
820,
825,
830,
840,
870,
890,
SB2,
and
SB3
Hardware
Problem
Analysis
and
Isolation
