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 Fan Replacement on page111).
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
LiebertMC is serving.
23. Verify proper fan operation by adjusting the cooling unit that this condenser serves so that it
calls for cooling.
Vertiv | Liebert® MC™ Installer/User Guide | 122
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