IBM FlashSystem 900, Service Manual

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Safety
Service Inspection Safety Procedures for the 3745, 3746-900, and
Controller Expansion
Important
This procedure addresses the 3745 Model 17A, 3745 Models 21A to 61A, 3746-900, and the controller
expansion. If the controller expansion is not present, ignore the statement concerning this unit in the
following procedure.
Unless otherwise specified the term 3745 means 3745 Model 17A, or 3745 Models 21A to 61A
throughout this manual.
Introduction
A safety inspection procedure for the 3745, 3746-900, and controller expansion should be per-
formed:
¹
When it is inspected for an IBM agreement
¹
When IBM service is requested and no service has recently been performed by IBM
¹
When an alterations and attachments review is performed
¹
When changes have been made to the equipment that might affect its safety.
If the inspection indicates unacceptable safety conditions, the conditions must be corrected before IBM
services the machine.
Note: The correction of any unsafe condition is the responsibility of the owner of the equipment.
The 3745, 3746-900, and controller expansion areas and functions checked through these procedures are:
1. External covers
2. Safety labels
3. Safety covers and shields
4. Grounding (earthing)
5. Circuit breaker and protector rating
6. Input power voltage
7. Power control switch
8. Power ON indicator.
Notes:
1. The 3746-900 is powered ON and OFF through the basic 3745 frame, from a host, locally, or from the
service processor.
2. For the 3745 Models 21A to 61A, the 3746s are powered ON and OFF through the basic 3745 frame.
Hazardous voltages are still present in some areas of the 3745 and the 3746-900 when power is
OFF.
Steps 1 through 6 must be performed after power OFF as follows:
¹
CB1s are switched OFF on the 3745 and 3746-900.
¹
All equipment installed in the controller expansion (if present) is powered OFF.
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3746-900: Service Guide