User guide

Installing the link Chapter 8: Troubleshooting
8-12
phn-2513_004v000 (Oct 2012)
Check IRFU status LEDs
Table 273 IRFU LED status checks
Label LED Condition Remedy/action
PWR Green Power supply is ON Do nothing
Off Power supply is OFF Push PWR button ON
ALM Green Indicates no hardware failure Do nothing
Yellow Flashing, indicates fans failure
or degradation
Verify fan wire leads, clean,
reconnect or replace the faulty fan
assembly when necessary; refer to
Replacing a fan assembly on page 5-
103.
Flashing, RF loopback
activated
Normal, do nothing
Temperature sensor in the PA
module exceeds threshold
Check if the Fan alarm is On, or if
the ambient temperature exceeds
+50 °C. If not, and the sensor
temperature remains higher than
the threshold (75 °C) for a long
time, refer to Replacing a
transceiver on page 5-97
.
Red Flashing, indicates hardware
failure, “Replace Me”
Replace the Transceiver, refer to
Replacing a transceiver on page 5-
97
.