IBM totalstorage 200, Service Manual

Page: 55 / 180

System shutdown
Refer to Table 13, Table 14, Table 15 on page 40, Table 16 on page 40, and
Table 17 on page 40, when experiencing system shutdown related to voltage or
temperature problems.
Voltage related system shutdown
Table 13 describes voltage related system shutdowns, their meanings, and
suggested actions.
Table 13. Voltage related shutdown messages and actions
Message Meaning Suggested Action
System shutoff due to X
current over max value
Level-critical; system drawing
too much current on voltage
X bus
See “Power checkout” on page 11.
System shutoff due to X
current over min value
Level-critical; current on
voltage bus
X under
minimum value
See “Power checkout” on page 11.
System shutoff due to X V
over voltage
Level-critical; system shutoff
due to
X supply over voltage
1. Check power supply connectors
2. Replace power supply
3. Replace power backplane
System shutoff due to X V
under voltage
Level-critical system shutoff
due to
X supply under
voltage
1. Check power supply connectors.
2. Replace power supply
3. Replace power backplane
System shutoff due to VRM
X over voltage
1. Replace power supply
2. Replace power supply backplane
Temperature related system shutdown
Table 14 describes temperature-related shutdown messages and suggested actions.
Table 14. Temperature related shutdown messages and suggested actions
Message Meaning Suggested Action
System shutoff due to
board over temperature Level-critical; board is over
temperature
1. Ensure system is being properly cooled, see
“Appendix C. Specifications” on page 117.
2. Replace board
System shutoff due to CPU
X over temperature
Level-critical; CPU X is over
temperature
1. Ensure system is being properly cooled, see
“Appendix C. Specifications” on page 117.
2. Replace CPU X
System shutoff due to CPU
X under temperature
Level-critical; CPU X is under
temperature
Ambient temperature must be within normal operating
specifications; see “Appendix C. Specifications” on
page 117.
System shutoff due to
DASD temperature (sensor
X) Level-critical; DASD area
reported temperature outside
recommended operating
range Ensure system is being properly cooled, see
“Appendix C. Specifications” on page 117.
System shutoff due to high
ambient temperature Level-critical; high ambient
temperature Ambient temperature must be within normal operating
specifications; see “Appendix C. Specifications” on
page 117.
Chapter 3. Symptom-to-part index
39