CHAPTER 1: Introduction
Two LEDs mounted on the rear panel of the power supply module indicate the status of the module:
Power On & OK | Module Fault | Status |
(Green) | (Orange) |
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Off | Off | No AC power (either power supply module) |
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Off | On | No AC power (this power supply module only) |
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| Power supply module fault (over temperature, over |
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| voltage, over current, or power supply module fan fail) |
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On | Off | AC present, power supply module on and OK |
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On | On | Power supply module fan fault |
Multiple power supply modules
In order to maintain the appropriate airflow, you must always operate the Gateway
Module replacement should only take a few minutes to perform but must be completed within 10 minutes from removal of the failed module.
Cooling module
The cooling module provides system cooling, thermal monitoring, and control functions.
System airflow is from the front to the back of the enclosure:
•Cooling air passes over drives and through the midplane to a central air passage.
•The cooling module pulls air from the air passage and from the controller modules.
Important
The system must be operated with a low pressure rear exhaust installation (back pressure created by rack doors and obstacles not to exceed 5 pascals (0.5 mm water gauge)).
•The power supply modules pull cooling air from the air passage at the back of the enclosure.
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