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Product Overview
•Power supply
–Loss of AC input power (the power source failed).
–Power supply detected an overvoltage, overcurrent, AC or DC undervoltage, or overtemperature condition within the power supply. This includes operator shutdown by turning off the system power switch, which the power supply interprets as an undervoltage condition.
–The chassis interface detected an overtemperature condition within the system.
•Blower
Table 2 | Typical |
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Parameter |
| Normal | High Warning |
| High Critical | Shutdown |
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Inlet |
| 44 C |
| 50 C |
| – |
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Hotpoint |
| 54 C |
| 60 C |
| – |
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Exhaust |
| – |
| – |
| – |
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Processors |
| – | – |
| – |
| 70 C |
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Power supply | – | – |
| – |
| 75 C |
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Restart |
| 40 C | – |
| – |
| – |
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Table 3 | Typical Power |
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Parameter |
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| Normal |
| Low Critical | Low Warning | High Warning | High Critical |
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+5V |
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| 4.74 to 5.26 |
| 4.49 | 4.74 |
| 5.25 |
| 5.52 |
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+12V |
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| 10.20 to 13.8 |
| 10.76 | 11.37 | 12.64 |
| 13.24 |
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+24V |
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| 20.00 to 28.00 |
| 19.06 | 21.51 | 28.87 |
| 26.51 |
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If the air temperature exceeds a defined threshold, the system processor displays warning messages on the console terminal and, if the temperature exceeds the shutdown threshold, it shuts down the system. The system stores the present parameter measurements for both temperature and DC voltage in NVRAM, so that you can retrieve it later as a report of the last shutdown parameters.
The power supplies monitor internal power supply temperature and voltages. A power supply is either within tolerance (Normal) or out of tolerance (Critical or Warning levels), as shown in Table 3. If an internal power supply temperature or voltage reaches a critical level, the power supply shuts down without any interaction with the system processor.
If the system detects that AC or DC input power is dropping, but it is able to recover before the power supply shuts down, it logs the event as an intermittent power failure. The reporting functions display the cumulative number of intermittent power failures logged since the last power up.
Upgrading the
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