Is the AC voltage from 200 V AC to 240 V AC?
Yes No
↓ Exchange the following parts one at a time.
v Uninterruptible power supply battery unit – part 44H77845
(minimum voltage 12.5V each)
v Uninterruptible power supply base unit – part 44H7784
v Uninterruptible power supply unit signal cable SIG7 – part 44H8027
v Uninterruptible power supply transformer unit – part 44H7786
59. Perform the following:
a. Disconnect the mainline AC power cable from the customer’s AC power
outlet.
b. Exchange one of the following FRUs:
v SPCN card (TWRCARD)
v Power supply (PWRSPLY)
v System unit card enclosure
c. Reconnect the mainline AC power cables to the power outlet.
d. Attempt to power on the system.
e. If the system powers on, the FRU you exchanged is failing item. If the
system does not power on, repeat steps 59a through 59e of this procedure
and exchange the next FRU in the list.
f. If the system does not power on after exchanging all the FRUs in the list,
ask your next level of support for assistance.
This ends the procedure.
60. Is there an SRC displayed on the control panel for the frame that does not
power on?
Yes No
↓ Replace the SPCN card (TWRCARD)
This ends the procedure.
61. Is the SRC 1xxx xx2E?
Yes No
↓ Go to “Starting Point for All Problems” on page 4.
62. Do SPCN optical cables A connect the failing frame B to the preceding frame
in the string?
┌─────────┐ (A) SPCN
│ System │ Optical Cables ─┐ ┌───── SPCN
│ Unit │ │ Optical
│ J15 │ ┌─┐ ┌─┐ Adapter
└────┬────┘ │ ├────────────┤ │
│ │ ├────────────┤ │
┌────┴────┐ ┌───────┴─┤ ┌───────┴─┤ ┌─────────┐
│ J15 │ │ J16│ │ J15│ │ │
│Frame J16├─┤J15 Frame│ │Frame J16├─┤J15 Frame│
│1 ││ 2│ │3 ││ 4│
└─────────┘ └─────────┘ └─────────┘ └─────────┘
└──── (B) Failing Frame
Yes No
↓ Go to step 66 on page 55 of this procedure.
Power Problems
Chapter 1. Starting Problem Analysis 53
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