M Precautions - Huawei FusionModule5000 Smart Modular Data Center Maintenance Manual

SmartDC
Maintenance Guide
Power Supply and Distribution System
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Cooling System
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Issue 04 (2020-03-25)
When operating power distribution equipment, follow the local regulations and rules.
When performing high-voltage and AC operations, use dedicated tools and wear
protection equipment.
Before replacing a component which is not hot swappable, you must switch off the
upstream circuit breaker, and verify that the component to be replaced is power off.
Assess impact on the system before switching off the general circuit breaker or cutting
off the cooling system during parts replacement.
Do not install or remove power cables when the device is on. Transient contact between
the core of the power cable and the conductor may generate electric arcs or sparks, which
may cause fire or hurt human eyes.
Before removing component cables, mark the cables with their corresponding port
numbers for later connection.
Before connecting a power cable, check that the label on the power cable is correct.
For the detailed power control relationships between devices, see the power distribution
system diagram for the solution in use.
Assign only professional engineers to perform O&M for the cooling system.
Do not operate valves of the cooling system arbitrarily.
Do not block the air exhaust and return vents of smart cooling products.
Promptly put serviced units into use after the cooling system is maintained; otherwise,
equipment cannot work at optimal status.
When operating pipe valves, check the water circulation system to avoid the situation in
which the container interior temperature goes out of control.
Apply anaerobic adhesive on thread connectors connecting pipes and system components
during component replacement to prevent water leakage.
If the number of running smart cooling products in an area is less than the rated
minimum number, some loads must be powered off; otherwise, temperature inside the
container may go out of control.
For details about initial configurations of the cooling system, see the specific parts
documentation.
Copyright © Huawei Technologies Co., Ltd.
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O&M Precautions
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