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APC SYMMETRA 990 User's Guide Page 25

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Maintenance – Parts Replacement
990-4147D-001 Symmetra PX 10-40 kW 400 V and 208 V Operation 19
How to replace the power modules
Warning: Only trained persons familiar with the construction and operation of the
equipment, as well as the electrical and mechanical hazards involved, may install and
remove system components.
Warning: Before removing any power modules, make sure that the remaining power
modules can support the load.
Heavy: Two people are required to lift components weighing 18-32 kg (40-70 lb).
Caution: Do not attempt to insert the power module using unnecessary force.
Caution: Tighten the spring-activated knobs before securing the locking latch to ensure that
the module makes proper contact in the unit. The power module will not operate unless the
locking latch is engaged.
Turn the locking latch to the left
until the arrow points down.
Unscrew the spring-activated
knobs on both sides of the
module.
Pull the module out of the
enclosure as far as the lock
mechanism will allow.
Release the lock by pressing the
black plastic tab on each side of
the module.
Pull the module out of the
enclosure.
Push the replacement module into
the system.
Tighten the spring-activated
knobs on each side of the module.
Secure locking latch to ensure
that the module makes proper
contact in the unit.
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