Inspecting The Ups For Unsafe Conditions - IBM 2145UPS-1U Hardware Installation Manual

11. If redundant ac power is used, test the grounding continuity between a
12. After you have completed testing the grounding continuity, perform one of

Inspecting the UPS for unsafe conditions

Ensure that you take the time to inspect the uninterruptible power supply (UPS)
for unsafe conditions.
Consider the following conditions and their potential safety hazards:
Electrical hazards (especially primary power)
Explosive hazards
Mechanical hazards
Use caution when working in a potential safety hazard that is not covered in the
safety checks. If unsafe conditions are present, determine how serious the hazards
are and whether you can continue before you correct the problem.
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IBM System Storage SAN Volume Controller: Hardware Installation Guide
conductive area on the SAN Volume Controller frame and the ground pin on
the plug of the main power cable of the redundant ac power switch. If the test
is successful, test the grounding continuity between a conductive area on the
SAN Volume Controller frame and the ground pin on the plug of the backup
power cable of the redundant ac power switch. Both tests must be successful.
the following procedures, depending on the outcome of the test.
v If the test is successful, reconnect any cables that were removed, and power
on any UPSs and SAN Volume Controller nodes that were powered off.
v If the test was not successful, ensure that all cables are securely connected.
If the test still fails, test the individual system components. Before you test
the individual components, remove all cables from the components. If any
component test fails, replace the component. After each component has
been tested and the failing ones have been replaced, repeat the complete
system test by returning to step 1 on page xix. Test the components in the
following order:
a. The SAN Volume Controller node, from the frame to the ground pin of
the input power receptacle.
b. The UPS from the ground pin of the input power receptacle to the
ground conductor of the output power receptacle.
c. If used, the redundant ac power switch from the ground pin of the main
input power receptacle to the ground conductor of the output power
receptacle, and from the ground pin of the backup input power
receptacle to the ground conductor of the output power receptacle.
d. The SAN Volume Controller node to UPS power cable assembly,
between the two ground conductors of the power cable.
e. The UPS input power cable, between the two ground conductors of the
power cable.
f. If used, the redundant ac power switch main input power cable, between
the two ground conductors of the cable.
g. If used, the redundant ac power switch backup input power cable,
between the two ground conductors of the cable.
Primary voltage on the frame can cause serious or lethal electrical shock.
A bulging capacitor can cause serious injury.
Loose or missing items (for example, nuts and screws) can cause serious
injury.