Printronix PrintCart - Manual (Page 40)

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Chapter 5 Serviceability Inspection
Serviceability Inspection
NOTE: Only trained personnel should perform this inspection/maintenance.
Periodically open the power compartment and inspect the internal
components for signs of loose connections, excessive dirt and dust buildup,
or any other condition that is out of the ordinary. Clean the cooling fan intake
and exhaust ports on the inverter every six months. Other ventilation features
should also be serviced at that time.
Any time the power compartment is accessed, disconnect the AC line power
cord from AC power and set the inverter to the OFF position.
Battery Replacement
Battery replacement is only required when batteries fail to hold sufficient
charge to support PrintCart operational requirements. If operated in
accordance with these instructions, the batteries should perform well for a
minimum of 3 years (600 charge/discharge cycles of 70%). Batteries will
slowly lose some of their charging capacity over time. This should be
noticeable but will not affect operational requirements.
When the batteries begin to fail, both batteries will not necessarily fail together
but the failure of one battery will cause the failure of the other. By the time you
notice a significant degradation in performance, one battery has already failed
and has probably damaged the remaining battery enough that it cannot
recover. For this reason, both batteries must be replaced at the same time.
Both replacement batteries must also be identical in capacity, and preferably
be made by the same supplier. Replacement batteries must conform to the
standards established in the repair parts section for dimensions, battery type,
and terminal type (see “Electrical Specifications” on page 48). Adherence to
these requirements will ensure that you do not compromise safety and
performance standards.
WARNING Because of the high electrical energy and potential for flammable gases
associated with lead acid batteries, use extreme care when servicing the
batteries. Maintenance must be done in a well-ventilated area by a
trained service technician. The service technician must wear safety
glasses, leather gloves, and steel-toed boots or shoes.
To easily and safely replace the battery, remove the BSP first (see page 39)
and place it on a suitable work surface.
WARNING Do not work on the BSP while it is resting on the pallet jack fork.