IBM 8676 Hardware Maintenance Manual - Page 118

Temperature, related, system, shutdown, checkout, built-in

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Page 118 highlights

Temperature related system shutdown Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Message Action System shutoff due to board over temperature (level-critical; board is over temperature) 1. Ensure that the system is being properly cooled; see "System reliability considerations" on page 37″. 2. Replace board. System shutoff due to CPU x over temperature (level-critical; CPU x is over temperature) 1. Ensure that the system is being properly cooled; see "System reliability considerations" on page 37. 2. Replace CPU x. System shutoff due to CPU x under temperature (level-critical; CPU x is under temperature) v Ambient temperature must be within normal operating specifications; see "Features and specifications" on page 2. System shutoff due to DASD temperature (sensor x) (level-critical; DASD area reported temperature outside recommended operating range) v Ensure that the system is being properly cooled; see "System reliability considerations" on page 37. System shutoff due to high ambient temperature (level-critical; high ambient temperature) v Ambient temperature must be within normal operating specifications; see "Features and specifications" on page 2. System shutoff due to system board under temperature (level-critical; system board is under temperature) v Ambient temperature must be within normal operating specifications; see "Features and specifications" on page 2. DASD checkout Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Message Action Hard drive x removal detected (level-critical; hard drive x has been removed) v Information only, take action as appropriate. Host built-in self test (BIST) Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Message Action Host fail (level-informational; built-in self-test for the host failed) 1. Reseat the microprocessor. 2. Reseat the VRM. 3. Replace the microprocessor CPU. 108 xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide

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Temperature
related
system
shutdown
Note:
See
“System”
on
page
112
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Message
Action
System
shutoff
due
to
board
over
temperature
(level-critical;
board
is
over
temperature)
1.
Ensure
that
the
system
is
being
properly
cooled
;
see
“System
reliability
considerations”
on
page
37
″
.
2.
Replace
board.
System
shutoff
due
to
CPU
x
over
temperature
(level-critical;
CPU
x
is
over
temperature)
1.
Ensure
that
the
system
is
being
properly
cooled
;
see
“System
reliability
considerations”
on
page
37.
2.
Replace
CPU
x
.
System
shutoff
due
to
CPU
x
under
temperature
(level-critical;
CPU
x
is
under
temperature)
v
Ambient
temperature
must
be
within
normal
operating
specifications
;
see
“Features
and
specifications”
on
page
2.
System
shutoff
due
to
DASD
temperature
(sensor
x
)
(level-critical;
DASD
area
reported
temperature
outside
recommended
operating
range)
v
Ensure
that
the
system
is
being
properly
cooled
;
see
“System
reliability
considerations”
on
page
37.
System
shutoff
due
to
high
ambient
temperature
(level-critical;
high
ambient
temperature)
v
Ambient
temperature
must
be
within
normal
operating
specifications
;
see
“Features
and
specifications”
on
page
2.
System
shutoff
due
to
system
board
under
temperature
(level-critical;
system
board
is
under
temperature)
v
Ambient
temperature
must
be
within
normal
operating
specifications
;
see
“Features
and
specifications”
on
page
2.
DASD
checkout
Note:
See
“System”
on
page
112
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Message
Action
Hard
drive
x
removal
detected
(level-critical;
hard
drive
x
has
been
removed)
v
Information
only,
take
action
as
appropriate.
Host
built-in
self
test
(BIST)
Note:
See
“System”
on
page
112
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Message
Action
Host
fail
(level-informational;
built-in
self-test
for
the
host
failed)
1.
Reseat
the
microprocessor.
2.
Reseat
the
VRM.
3.
Replace
the
microprocessor
CPU.
108
xSeries
335
Type
8676,
Type
8830:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide