GR4000 Installation Guide Version 1.00 - Preliminary
520-10-014-20X
37
(3) LED (Light Emitting Diode) and Switches
Table 1.4-1
LED Indications and Switches on the BCU
-
RH8ME Front Panel
Name
Type or color
Role
Action Status
LAMP TEST
Switch
Lamp test
Lamp test switch
（
non-lock
）（
Note 1
）
RESET
Switch
Manual reset of a device
Reset switch
（
non-lock
）
POWER
LED
：
Green
Shows the condition of
power input.
ON: Power output in BCU is normal.
OFF: Power output in BCU is abnormal, or BCU
is powered off.
READY
LED
：
Green
Shows the action status of
a device.
ON: Operation is possible.
OFF: A failure was found in BCU , or BCU is
being initialized.
ERROR
LED
：
Yellow
Shows a partial error in a
device.
ON: A partial error was found in a device.
ALARM
LED
：
Red
Shows the problem
affecting the entire body of
a device.
ON: The problem affecting the entire body of a
device happened.
POST
LED
：
Green
Shows the condition of
STATUS CODE.
ON: STATUS CODE
（
7SEG
）
is showing the
initial diagnosis code of BCU.
OFF: STATUS CODE
（
7SEG
）
is showing
FAULT CODE.
STATUS
CODE
7SEG
：
Green
Shows the condition of a
device. (7SEG, decimal
with 2 digits)
ON: The code (00
～
99) to tell the condition of a
device is shown.
（
The code shows the different
contents when POST LED is lit.
）
MEMORY
CARD 0
ACC
LED
：
Green
ON: The memory card 0 is being accessed.
(Pulling out the memory card from a device is
prohibited.
)
OFF: The memory card 0 is being idled.
(Inserting or pulling out the memory card into or
from a device is allowed.
)
MEMORY
CARD 0
PRI
LED
：
Green
Shows the condition of the
memory card 0.
ON: A device was started up as the primary.
OFF: A device was started up as the
secondary. Or the memory card 0 is not used.
MEMORY
CARD 1
ACC
LED
：
Green
ON: The memory card 1 is being accessed.
(
Pulling out the memory card from a device is
prohibited.
)
OFF: The memory card 1 is being idled.
(Inserting or pulling out the memory card into or
from a device is allowed.)
MEMORY
CARD 1
PRI
LED
：
Green
Shows the condition of the
memory card 1.
ON: A device was started up as the primary.
OFF: A device was started up as the
secondary. Or the memory card 0 is not used.
Green ON
:I
nterface lines are working (Note 2
)
LINK
/
ACT
LINE ERR
LED
：
Green
/
Yellow
Yellow ON: A failure was detected in an
interface line.
T/R
LED
：
Green
Shows the action status of
CONSOLE
(
10BASE-
T/100BASE
-
TX
)
Green ON: Packets are being
forwarded/received. (Note 3
）
(Note 1)
：
When the lamp test switch is pushed, all the LEDs except those on the locked out boards are lit.
(Note 2)
：
If you are using a wrong type of a twisted-pair cable, there is a chance that the LED will be lit. If so, change the
twisted-pair cable to the correct type referring Chapter 3.
(Note 3)
：
Regardless of the state of the line, the LED will be lit if the system detects date being sent or received.
Because of this, there is a chance that the LED will be lit even if the cable is not connected on the destination side.
*
NOTE: The status of some actions related to BCU is indicated by the LED on the front
panel of the device. See the section “1.1 Chassis” for its outer appearance, etc.
NOTE:.
Do not install optional components from a GR4000 or GS4000 into
devices other than another GR4000 or GS4000. Doing this causes a fire
or an electric shock.
