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4.2
LED INDICATORS
4.2.1 MU LED INDICATORS
Diagnostic LEDs are located on the MCU of the MU; each indicates the status of a particular function:
Identifier
Color
RUN
Green
ALM
Red
FSK
Green
The LEDs RUN, ALM, FSK will flash simultaneously three times during system self-checking after
equipment power-up. Then RUN flashes every second to indicate system commissioning can be
proceeded with.
4.2.2 RU LED INDICATORS
Three diagnostic indicators are located on the MCU integrated in the RU enclosure; each indicates
the status of a particular function.
Identifier
Colour
H1
Green
H2
Red
H3
Green
The LEDs H1, H2, H3 will flash simultaneously three times during system self-checking after
equipment power-up. Then H1 flashes every second to indicate system commissioning can be
proceeded with.
RA-7800 QI
ENU Status : 1-0-1
INSTALLATION GUIDE FOR RA-7800
Indication
Operation indicator – power is supplied to the MU. Flashes once every
second to indicate normal system operation.
Alarm indicator. ON = alarm; OFF = no alarm
Diagnostic LED for FSK communication and MODEM operation. Flashes
once every two seconds to indication normal communication between MU
and RU.
Table 20: MU LED Indicators
Indication
Operation indicator – power is supplied to the RU. Flashes once every
second to indicate normal system operation.
Alarm indicator. ON = alarm; OFF = no alarm
Diagnostic LED for FSK communication and MODEM operation. Flashes
once every two seconds to indication normal communication between MU
and RU.
Table 21: RU LED Indicators
Copyright - refer to title page
Page 46
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