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Manual ION-M7P-7P-85P-19P
MF0145A4A.doc
4.4.
STATUS LED ALARMS
For local supervision, a status LED on the connector flange of the Remote Unit gives
an indication of possible reasons for alarms. This table shows possible on-site
measures that could be checked before referring to the Master Unit alarm list.
Status LED Indication
Alarms
Possible on-site measures
Green
No alarm
Status ok
Door alarm
Close the door (RUs with door).
Alarms not directly related to RU:
External alarms
Check externally connected devices.
Optical alarm Rx
Check fiber loss of optical link.
Check optical connectors.
Clean optical connectors.
(MU: Check optical output power of
corresponding OTRx at Master Unit).
Orange
ALC alarm
(MU: Decrease DL input power of
affected band).
Alarms directly related to RU:
Power 28 V
Change power supply (RUs with door).
Replace the affected Remote Unit.
Temperature
Reduce environmental temperature.
Eliminate thermal short circuit.
Fan
Disconnect and connect power supply.
Fans should run. If not, replace the fans
at RU.
I²C
Disconnect and connect power supply.
Optical alarm Tx Exchange RU.
Red
Amplifier “Power
Down”
(MU: Change amplifier setting at MU
controller).
Status LED off
Power supply
Check power switch inside of RU (RUs
with door).
Check power supply cabling.
Check power supply.
table 4-1 Status LED alarms
For the position of the status LED see section
Explicit troubleshooting is available in the MU software, (software manual or WEB
Interface).