3-4
Service Manual PRELIMINARY
3.2
Troubleshooting Power Problems
Power problems can occur before the system is up or while the system is
running. If a system stops running, make a habit of checking the PCM.
Power Problem List
The system will halt for the following:
1. A CPU fan failure
2. A system fan failure
3. An overtemperature condition
4. Power supply failure
5. Circuit breaker(s) tripped
6. AC problem
7. Interlock switch activation or failure
8. Environmental electrical failure or
unrecoverable system fault
with auto_action ev = halt or boot
9. Cable failure
10. Module failure - System motherboard, PCI
motherboard, or system bus to PCI bus bridge
11. RCM breaking the interlock circuit
Indications of failure:
1. Motherboard LEDs indicate
fan, and over-temperature condition
2. OCP
2. Circuit breaker(s) tripped
No obvious indications for failures 7 - 13
from the power system.
PKW0512-97
Halt Caused by Power, Fan, or Over-temperature Condition
If a system is stopped because of a power, fan, or over-temperature problem, the
console and the OCP should report the problem.
