DS8000 Service Documentation Version 7.5

MAP2222 DC-UPS communication failure to both RPC cards (Model 961)

One or more communications paths to the DC-UPS DSU are failing.

MAP2222 Section-1

Procedure

Inspect the following cables. (Figure 1.)
1. If the Ex-J9 (DC-UPS DSU to DSU communication cable) appears damaged or misplugged, go to step 2.
2. If the Ex-J6 or Ex-J7 (RPC card to DC-UPS cable) appears damaged or misplugged, go to step 3.
3. If the Ex-J5 (UEPO switch and cable assembly) appears damaged or misplugged, go to step 4.
4. If you did not find any damaged or mis-plugged cables, exit this procedure and replace the DC-UPS DSU FRU listed in the serviceable event.
Figure 1. Location codes for the DC-UPS (Models 961, 96E) (rear)
Read the following and then select the appropriate action.
1. If there is a DSU to DSU communication error, "XA" should be displayed in the DSU status display . See Figure 2.
  Note: DSU status codes are defined in MAP2341 Codes on the DC-UPS DSU status display. MAP2341 is not used to begin repairs.
2. The Ex-J9 (DC-UPS DSU to DSU communication cable) MUST NOT BE HOT-PLUGGED.
  The Ex-J9 cable must be replaced or reconnected using a pseudo-repair of the DC-UPS DSU.
  That DC-UPS DSU parts exchange procedure protects the DC-UPS staying in customer use.
3. To install or reconnect the cable, you must do a pseudo-repair of the DSU. A pseudo-repair means you use the management console guided parts exchange procedure. There are two ways to do this:
  1. Exit this procedure and then return to the serviceable event that sent you here and select the DC-UPS DSU from the FRU list.
  2. Refer to MAP1230 Replace a FRU without using a serviceable event and use the DC-UPS DSU location code listed in the serviceable event FRU list that sent you here.
Figure 2. LEDs on the DC-UPS DC Supply Unit (DSU), rear of rack
Read the following and then select the appropriate action.
1. The Ex-J6, Ex-J7 (RPC card to DC-UPS DSU cable) cannot be hot-plugged.
2. If the cable is damaged, order a new one.
3. To install or reconnect the cable, you must do a pseudo-repair of the DSU. A pseudo-repair means you use the management console guided parts exchange procedure. There are two ways to do this.
  1. Exit this procedure and then return to the serviceable event that sent you here and select the DC-UPS DSU from the FRU list.
  2. Refer to MAP1230 Replace a FRU without using a serviceable event and use the DC-UPS DSU location code listed in the serviceable event FRU list that sent you here.
Read the following and then select the appropriate action.
1. The Ex-J5 (UEPO switch and cable) must not be hot-plugged. The cable cannot be replaced concurrent with customer operation.
2. If the cable is damaged, order a new one.
3. To install or reconnect the cable, exit this procedure and go to Exchange the UEPO switch and cable assembly.