Vertiv Liebert DSE Packaged 400, Installer/User Manual

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18. If the old board parameters were unavailable, use the new HMI label included in kit to obtain the proper
settings. Parameters C03, C04, C05 and C06 must be programmed with the proper EC fan supplier used on
the unit.
19. Address the fans (refer to Replacing the Condenser Fan on page 47).
20. Compare the HMI label on the unit with the latest revision.
• If there are differences, clean and dry the surface of the old HMI label; attach the new label on top of the
old label, covering the old label with the new one.
21. Verify that the control board is reading pressure and temperature.
22. Verify that there are no communication alarms with the fans or with the cooling unit the condenser is serving.
23. Verify proper fan operation by adjusting the cooling unit that this condenser serves so that it calls for cooling.
8.10 Pumped Refrigerant Economizer (PRE)
Your Liebert® DSE™ Packaged Solution includes two Liebert® PRE systems. Refer to the Liebert® EconoPhase Installer/User
Guide, available at www.Vertiv.com, for the maintenance and operation details.
Vertiv | DSE Packaged Solution Installer/User Guide
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