Alpha Technologies CXPS 48-1.8-i, 48V Pos Gnd - Manual (Page 41)

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8.3 CXCI Replacement (as used with 1.8kW shelf)
Refer to all safety instructions provided in the documentation package provided with your system.
WARNING: HIGH VOLTAGE AND SHOCK HAZARD.
Use extreme care when working inside the shelf while the system is energized.
Do not make contact with live components or parts.
Circuit cards, including RAM chips, can be damaged by static electricity. Always wear a grounded
wrist strap when handling or installing circuit cards.
1. Write down the CXCI communication information: dynamic or static IP, IP address, and gateway.
2. Connect user laptop to CXCI per software manual; standard network crossover cable to Ethernet port.
3. A step-by-step connection (wizard) application (Windows® 2000 operating system) – provided to establish
remote communications with your CXCI – is available via the Argus website (www.argusdcpower.com). The
CXC Connection Wizard will save your LAN configuration and restore it back when exiting the application.
4. Save CXCI configuration file (see software manual).
5. Bypass system LVD using LVD Inhibit switch as required and remove signal wires (via DB connectors) from
CXCI.
CAUTION: If the LVD is not bypassed, the DC loads will be shut down when the wiring to the
controller is removed.
6. Ensure rectifier is in the right-most position.
7. Remove rectifier in the left-most position in order to access the side of the CXCI where the mounting screws
are located.
8. Remove four (4) mounting screws from the CXCI as shown below. The first two screws will release the front
panel from the controller circuit board to expose the third screw which releases the LCD. Carefully remove the
LCD to expose the fourth and final screw to release the remains of the CXCI.
Figure 15–Showing CXCI replacement
Screw 3 and 4
Screw 1 and 2 (2PL)
9. Replace CXCI following steps 7 and 8 in reverse order. CAUTION - Do not push on the LCD. Continue to step
10 to complete procedure.
10. Review steps 1 through 3 with respect to new installation and upload the saved CXCI configuration file to the
new controller.
11. Use a meter to verify the buss voltage and current shunt. Recalibrate as required due to differences in the
new CXCI.
12. Replace rectifiers and signal wires. Return LVD Inhibit switch to normal.