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SERVICING THE AT10.1
59
Replacing the control circuit board (A1)
CAUTION: A1 is sensitive to damage from static discharges. Leave
the circuit board in its anti-static bag until you are ready to install it.
Ground yourself before handling the board by touching the ground
stud on the back of the door. Handle the board only by the edges.
Turn off all power to the charger. Disconnect the battery from the output
terminals. If the optional temperature compensation probe is installed,
disconnect the leads from TB8. Remove the harness plug from the upper
left edge of the control circuit board, and unplug wire # 30 from the quick-
connect terminal near the upper left corner of the board.
The board is mounted on six plastic standoffs. Compress the tab on each
standoff, and pull the board toward you until it clears all the standoffs. Put
the replacement board in place with the same orientation, and push it onto
the standoffs. Be sure that the board is fully seated on the standoffs.
Replace wire # 30 on the quick-connect terminal, and connect the harness
plug to the board at the top edge. Replace any optional wiring, such as the
temperature compensation probe. See section 2.1 for the steps to restart
the charger.
If your charger parameters (float voltage, etc.) are different from the
factory preset values, you should program in the new values now. See
section 2.3. You should also recalibrate the dc voltmeter according to
section 2.3.7.
Replacing the rectifier heat sink assembly (A6)
Refer to the customer instruction supplement JA0086-01 supplied with
your replacement rectifier heat sink assembly EJ1243-00.
Deenergize and lock out all ac and dc voltage sources to the AT10.1. This
includes remote sense wires if they were installed. Check with a voltmeter
before proceeding. Remove the enclosure shroud as described in the
previous section. Make sure the rectifier heat sink has cooled and remove
the entire assembly by the front edge. Remove all wires attached to the
rectifier control pc board as you pull the assembly out of the enclosure.
Hold the replacement rectifier assembly in front of the AT10.1 (in the
same orientation as the old), and reconnect all wires removed from the old
assembly as you insert it into the enclosure. To ensure correct
replacement, see the wiring diagrams in Appendix C of this manual or the
customer instruction supplement JA0086-01, supplied with the
replacement heat sink assembly. When you are done, check to ensure all
wires are connected to the proper terminals, and all lugs are fully seated. If
any lug does not fit snugly, disconnect it, carefully tighten the ears of the
lug using long-nosed pliers, and reconnect.