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3 Hardware
3.1 Installation
WARNING
Disconnect and lock out all power to the battery charger before starting any maintenance
procedures. Turn the AC power off at the distribution panel upstream from the battery
charger. Disconnect the battery from the charger output terminals. This includes remote
sense wires if they were installed.
CAUTION
This part is susceptible to damage from static discharge.
precautions:
• If you have a ground wrist strap, please use it to ground yourself to the charger
enclosure using the ground stud on the back of the door.
• Touch the ground stud on the back of the door before handling circuit boards or other
static sensitive parts.
• Handle circuit boards only by their edges.
• Ground yourself again before you replace any connectors or terminals on the new
part.
• If you are replacing a static sensitive circuit board parts, be sure you are grounded
before removing the new part from its anti-static carrier.
Installation Steps
Step 1 Turn off the AC and DC circuit breakers on the charger. Using a voltmeter, verify
that all potential voltages on the I/O panel are zero. This includes the DC Output
terminals TB1(+) and TB1(-), and the Remote Sense terminals (+) and (-).
Step 2 Locate the stand-offs that hold the main control card. Use a needle nose pliers to
pinch the retaining ear on the stand-offs, and gently pull the main control card back
off the stand-offs, roughly 0.25 inches. It is best to unlatch all stand-offs first with
the main control card still resting on them. Finally, remove the main control card in
one motion.
Step 3 The EN5004-xx communications module pc board (A12) mounts to the left of the
EN5002-xx main control pc board (A1), with connector (P13) plugged into J13.
Make sure that the pins on the connector line up. See Figure 1.
Step 4 Position the boards over the stand-offs. Firmly push both boards onto the stand-offs
until they are fully seated under the plastic clips. Minimize pc board flexing by
pushing directly on the areas surrounding stand-offs holes. Check the front panel
for proper alignment of indicating lights and push button switches.
HARDWARE
Please use the following
3
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