Installing a CCU

Procedure

1. Install a new CCU in the full liquid cooling cabinet, as shown by 1 in Figure 5-2.
2. Use a Phillips screwdriver to tighten the four screws to secure the CCU, as shown by 2 in Figure 5-2.
   Figure 5-2 Installing a CCU
   

3. Install all cables on the CCU panel.
   • The photoelectric liquid level sensor on the left (viewed from the front door of the cabinet) connects to the LEAK-L1 and LEAK-L2 ports on the CCU.
   • The photoelectric liquid level sensor on the right (viewed from the front door of the cabinet) connects to the LEAK-L3 and LEAK-L4 ports on the CCU.
   • The float liquid level sensor on the left (viewed from the front door of the cabinet) connects to the LEAK-F1 and LEAK-F2 ports on the CCU.
   • The float liquid level sensor on the right (viewed from the front door of the cabinet) connects to the LEAK-F3 and LEAK-F4 ports on the CCU.

4. Check whether the cables are correctly connected according to labels. Ensure that the cables are correctly connected to the monitoring slots of the CCU.
5. Check whether the photoelectric liquid level sensor is correctly connected.
   • LEAK-L1 and LEAK-L2 enable operators to monitor the liquid level of the water pan at the bottom of the left Manifold (viewed from the front door of the cabinet).
   • LEAK-L3 and LEAK-L4 enable operators to monitor the liquid level of the water pan at the bottom of the right Manifold (viewed from the front door of the cabinet).
   1. Inject water to the trays of the photoelectric liquid level sensors on both sides.
   2. Check the monitoring status of LEAK-L1 to LEAK-L4.
      • If the status is 0, the connection is normal.
      • If the status is 1, the cable is not properly connected. Reconnect the cable.

6. Check whether the float liquid level sensor is properly connected.
   • LEAK-F1 and LEAK-F2 enable operators to monitor the liquid level in the water pan of the left air/liquid heat exchanger (viewed from the front door of the cabinet). When the liquid level exceeds the threshold, the CCU generates an alarm and the CCU controls the corresponding drainage pump based on the selected association mechanism.
   • LEAK-F3 and LEAK-F4 enable operators to monitor the liquid level in the water pan of the right air/liquid heat exchanger (viewed from the front door of the cabinet). When the liquid level exceeds the threshold, the CCU generates an alarm and the CCU controls the corresponding drainage pump based on the selected linkage mechanism.
   1. Inject water to the trays of float liquid level sensors on both sides.
   2. Check the monitoring status of LEAK-F1 to LEAK-F4.
      • If the status is 1, the connection is normal.
      • If the status is 0, the cable is not properly connected. Reconnect the cable.