
B-63354EN/04 VI. MAINTENANCE 3.HARD DISK DRIVE UNIT MAINTENANCE INFORMATION
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3.2 LED Indications
The hard disk drive interface board incorporates the following LEDs:
Two green LEDs (LED1 and LED3) and one red LED (LED2). The
figure below shows the locations of these LEDs. The table below
explains the LED lighting states.
In the following explanations, the LED lighting states are expressed as
follows:
¨: Off n: On ¶: Blinking à: Don't care
No. LED indication Ethernet communication status
1 LED1(HDD/GREEN) n Lights while the hard disk drive is being
accessed.
2 LED2(FAN/RED) n LED indicating a fan alarm for the hard disk
drive unit. Lights when a fan alarm condition
occurs.
3 LED3(12V/GREEN) n Lights while +12 V is being supplied to the hard
disk drive. Does not light immediately after the
power is turned on. Turns off if a fuse blows.
CP1A
CN1
LED1(HDD)
LED2(FAN)
LED3(12V)
CP2
CNH4
CNH7