Vertiv CoolPhase CDU - Page 109

8. Check/Re-torque the wire connections.
9. Check the contactors for pitting (replace if pitted).
10. Verify the operation sequence/set points.
11. Charge verification:
a. Outdoor ambient temperature.
b. Subcooling
c. Indoor unit return air temperature
* Motor amp draw
#1 L1 L2 L3
#2 L1 L2 L3
#3 L1 L2 L3
#4 L1 L2 L3
#5 L1 L2 L3
#6 L1 L2 L3
#7 L1 L2 L3
#8 L1 L2 L3
#9 L1 L2 L3
#10 L1 L2 L3
#11 L1 L2 L3
#12 L1 L2 L3
#13 L1 L2 L3
#14 L1 L2 L3
#15 L1 L2 L3
#16 L1 L2 L3
Vertiv™ Liebert® EconoPhase Pumped Refrigerant Economizer
1. Check for refrigerant leaks.
2. Check/re-torque the wire connections.
3. Check the contactors for pitting (replace if pitted).
4. Verify the pump speed control operation.
5. Check the pump mounting.
13 Preventive Maintenance Checklist Proprietary and Confidential ©2024 Vertiv Group Corp. 103
Vertiv™ CoolPhase CDU Installer/User Guide