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168 Hardware Maintenance Manual: xSeries 250
System shutdown
Refer to the following tables when experiencing system shutdown related to voltage
or temperature problems.
Power related system shutdown
Temperature related system shutdown
Message Action
System powered off due to "X" current over
max value (level-critical; system drawing too
much current on voltage "X" bus)
1. See “Power checkout” on page 32.
System shutoff due to "X" current under min
value (level-critical; current on voltage bus
"X" under minimum value)
1. See “Power checkout” on page 32.
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 powered off due to faults on each
power supply.
1. See “Power checkout” on page 32.
Message Action
System shutoff due to board over temperature
(level-critical; processor board is over
temperature)
1. Ensure system is being properly
cooled, see “Temperature checkout” on
page 32.
2. Replace processor board
System shutoff due to CPU "X" over
temperature (level-critical; CPU "X" is over
temperature)
1. Ensure system is being properly
cooled, see “Temperature checkout” on
page 32.
2. Replace CPU "X"
System shutoff due to CPU "X" under
temperature (level-critical; CPU "X" is under
temperature)
1. Ambient temperature must be within
normal operating specifications (see
“Features and specifications” on page
3.
2.
System shutoff due to DASD temperature
(sensor X) (level-critical; DASD area reported
temperature outside recommended operating
range)
1. Ensure system is being properly
cooled, see “Temperature checkout” on
page 32.