Compaq AlphaServer IP Platform, Owner'S Manual

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System Troubleshooting
AlphaServer Intelligent Peripheral Platform Hardware Owner's Guide 5–3
5.4 ISA Bus Expansion Chassis
The ISA bus expansion chassis contains alarm sensors that detect fault conditions and send
the information to the alarm control module in the AlphaServer 1000A system chassis.
For a complete description of alarm sensor interaction with the IP Fault Manager software,
see the Intelligent Peripheral Fault Manager for Tru64 UNIX Installation and User's Guide.
The status of the Dialogic voice modules is handled at the application level and not by the IP
Fault Manager software.
5.5 Modular Storage Shelf BA35x-Sx Subsystem
The modular storage shelf BA35x-Sx uses the LEDs of its StorageWorks building blocks
(SBBs) to indicate problems within the power unit, storage devices, and StorageWorks shelf.
Depending upon the problem, these displays can be flashing, on, or off. The BA350 Modular
Storage Shelf Subsystem User’s Guide provides instructions on how to interpret these
displays.
5.6 AlphaServer IP Power Controllers
If the power controllers do not function properly, perform the following steps:
1. Prior to turning on the circuit breakers for the 120 Vac or 250 Vac controllers, ensure
that the neon indicator is on, indicating that an ac voltage is present. The -48 Vdc
controller does not have an indicator for voltage. It should be connected to the -48 Vdc
battery/power source prior to turning on the circuit breakers.
2. Check that the circuit breakers are on for each of the power controllers installed.
3. Refer to the DIGITAL 2T-48VDC-xx -48Vdc-to-120Vac Power Inverter Owner’s Guide
for more troubleshooting information on the -48 Vdc controller.