NEC MT2200, User Manual

Page: 41 / 192

2-23
Features
D Padlock loops Secure the side covers by using padlocks (not provided). The
top cover cannot be removed until the side covers have been
removed.
–
Environmental
sensors (Not shown in figure) The system contains sensors to monitor
temperature, voltage, and fan failure.
Hot Swap Power
Power supplies are hot-swappable and are easily
removed and installed.
The second optional power supply provides redundant
power so that if one of the two power supplies fail, the
system will continue to operate and the failed power
supply can be hot swapped. That is the failed power
supply is removed and replaced without turning power
off.
The first slot (slot 1) is the basic power supply module
slot, the third slot (slot R) is a redundant power supply
module slot. The middle slot (slot 2) is not used on this
system. Each failed power supply module can be
removed without turning off power. Each power supply
module has two LEDs. Table 2-3 shows the Power LED
Indicators and Figure 2-7 shows removing the power
supply modules.
Table 2-3. Power LED Indicators
LED Status Description Response
DC-Power Off
Green
Power is off
Power is on
None required - normal
None required - normal
Alarm Off
Amber
No alarm
Power failure
Abnormal Power temperature
Power FAN alarm
DC-Power alarm
None required - normal
Replace Power supply
Clean air passages
Replace Power supply
Replace Power supply