Vertiv Liebert DSE Packaged 400, Инструкция по установке и эксплуатации

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8.9.2 Installing the Replacement Board
WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply disconnect
switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective
equipment (PPE) per NFPA 70E before working within the electric control enclosure. Failure to comply can
cause serious injury or death. Customer must provide earth ground to unit, per NEC, CEC and local codes, as
applicable. Before proceeding with installation, read all instructions, verify that all the parts are included and
check the nameplate to be sure the voltage matches available utility power. The Liebert® controller does not
isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive
power even during the “Unit Off” mode of the controller. The factory-supplied disconnect switch is on the
exterior of the enclosure. The factory-supplied, optional disconnect switch is inside the unit. The line side of
this switch contains live high-voltage. The only way to ensure that there is NO voltage inside the unit is to
install and open a remote disconnect switch. Refer to unit electrical schematic. Follow all local codes.
1. Turn Off the disconnect switch on the condenser enclosure cover.
2. Open the control enclosure cover.
3. Manually turn On the disconnect switch.
NOTE: Power is On and a shock hazard exists with exposure to hazardous voltage components.
4. If the board can still be powered up and has a display, record the parameter settings.
• To obtain parameters go to the C-- menu and press the UP or DOWN arrow button to read and record
the values for C03-09 and C27.
5. Record all of the DIP switch positions for the CANbus DIP switch package. Retain these for setting up the new
board.
6. Record the positions of the jumpers for J2, J4, J5 and J6 on control board in the unit. Retain these for setting up
the new board.
7. Disconnect power from the condenser by turning Off the main disconnect switch.
8. Use a voltmeter to verify that voltage is no longer present in the unit.
9. Remove the plugs and field-installed wires from the old board. Note the polarity for the CANbus wiring going to
P49 and P50, if present.
10. Mark wires P49-1, P49-3, etc, if they are not already marked.
11. Remove the mechanical fasteners holding the control board in place and remove the old control board.
12. Install the new control board using the fasteners removed in step 11.
13. Reattach the plugs. Refer to the hot-stamps on the wire harnesses that correspond to the correct plug on the
board. Verify that the plugs are installed properly.
14. Change the CANbus DIP switch positions so they match the control board that was removed. If the condenser is
the second condenser on the CANbus communication line, set Position 1 of the CANbus DIP switch from On to
Off.
15. Change the jumper positions for J2, J4, J5 and J6 to match the control board that was removed. If the
condenser is the last device on the CANbus communication line, move the jumper at J6 from Pins 2 and 3 to
Pins 1 and 2 (see Figure 8.7 on the previous page).
16. Power up the unit.
17. Change the parameters to match the parameters from the control board that was removed if they were
obtained from the old board in step 4. See step 18 if the parameters were unavailable.
8 Maintenance
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