User's Manual

5 Alarms
Page 39
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 -
A
mplifier “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 5-1 Status LED alarms
For the position of the status LED see chapter 4.2.2 Connections.
Explicit troubleshooting is available in the MU software (software manual or WEB
Interface).