Vertiv Liebert DSE060, Installer/User Manual

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8.10.2 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 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.
8 Maintenance
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