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Status LED indication Alarms
Possible on-site measures
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 mains. Fans
should run. If not, replace the fans at RU.
I²C
Disconnect and connect mains.
Optical alarm Tx Exchange RU.
Red
Amplifier “Power
Down”
(MU: Change amplifier setting at MU
controller).
Status LED off
Mains
Check power switch inside of RU (RUs
with door).
Check mains cabling.
Check mains power.
table 4-1 Status LED alarms
* only applicable if the RU is equipped with a fan
V1651A2
clear
Alarm LED
Alarm transmit
Alarm cause
raise
> 5 s
< 5 s
raise
> 5 s
clear
figure 4-1 Alarm triggering
For the position of the LED see chapter
3.2.2 Connections
.
Explicit troubleshooting is available in the MU software, (software manual or WEB
Interface).
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