Isolating Failures On External Power Unit - NEC IP8800/S2400 Series Troubleshooting Manual

2.2.2

Isolating Failures on External Power Unit

If the external power unit fails, follow the steps below to isolate the failure.
Table 2-5: Isolating Failures on External Power Unit
No.
1 POWER LED on the external power unit is lit in
green
2 POWER LED on the external power unit is OFF
Table 2-6: Isolating Failures on External Power Unit (Main Body)
No.
1 Power switch on the external power unit is OFF
2 Power cable of the external power unit is not
correctly connected to the system
3 Input power to the external power unit is out of the
range below
(AC power supply: 90 to 132V)
4 Other than 1 to 3 above
Table 2-7: Isolating Failures on Power Module
No.
1 Power switch on the power module is OFF
2 Power cable of the power module is not correctly
connected to the system
3 Power module is not correctly mounted on the
external power unit
4 Other than 1 to 3 above
Failure
Failure
Failure
2.
Action
Check LED on the power module mounted on the external power unit
and identify the power module that is not normally running. If the power
module is normally running, the states below are provided.
• EPU-A:
DC-OK: Lit in green, DC-ALM: OFF
• EPU-B:
DC-OK: Lit in green, DC-FAIL: OFF, AC-OK: Lit in green
For the power module that is not normally running, implement
2-7: Isolating Failures on Power
Follow the steps in "Table 2-6: Isolating Failures on External Power
Unit (Main Body)."
Action
Turn on the power switch.
1. Turn off the power switch.
2. Connect the power cable correctly.
3. Turn on the power switch.
Ask the system administrator to take the action because of the failure on
the power supply facility (i.e. not the failure on this system).
Replace the external power unit.
Action
Turn on the power switch on the power module.
1. Turn off the power switch on the power module.
2. Connect the power cable correctly.
3. Turn on the power switch on the power module.
1. Turn off the power switch.
2. Mount the power module correctly.
3. Turn on the power switch.
Replace the power module.
Troubleshooting System Failures
"Table
Module."
17