User's Manual Part 3

OS-1933-E3-003 Troubleshooting
4-2 044-05243 Rev A
Troubleshooting
Status of each individual module can be determined by the status of the LED (MCPAs, Rectifier, Controller
represents system and RFCUs). All LEDs should illuminate a solid green; any other indication requires access
to the Status / Alarm page. Some common alarms and there remedies are detailed in the following sections.
MCPA does not have a solid green LED
Table 4-2 MCPA - no solid green LED
LED Color Status Action
Red Solid
Open Status / Alarms page for details about the MCPA fault.
No LED No LED
Check Power system or verify the appropriate fuse located on the
rear of the power system.
Yellow Blinking
The MCPA is measuring >50W of reflected power.
i. Ensure that the TX/RX ANT ports are terminated adequately
ii. Ensure that the MCPA is installed fully and the latches are
secured.
iii. Try reseating the MCPA; disable the MCPA by the front panel
switch (down) before removing.
iv.If not remedied the MCPA will shutdown in one minute. If shutdown
for VSWR, the MCPA will require a manual reset with the front panel
switch (up position) to recover.
Yellow Solid
The MCPA has reduced gain to compensate for an excessive input
level.
i. Ensure the input sources are within the specified power levels.
ii. Ensure the TX Gain is configured in accordance to the
specifications in Section 5.
iii. The MCPA can only compensate for 6dB. The MCPA could
disable and require a manual reset via the front panel switch (up
position).
iv. Operating the OS System equipment under this condition could
manifest into a system shutdown due to excessive temperature and/
or RF power.
Red/Yellow Blinking
Firmware is not loading correctly
i. Extract module from the OS system
ii. Place the front panel switch in the ON position (middle)
iii. Re-insert the MCPA into the OS system
iv. Latch to top and bottom fasteners.
Green Blinking
The MCPA is ready to enable, but something in the system is
preventing this. Check the following
i. Verify the Sector is enabled via the System/Configuration page,
Installed section.
ii. Attempt re-seating the MCPA and ensuring the latches are locked.
iii. Try another MCPA.
iv. View the Status/Alarm page for more details
v. If the communication to the system cannot be established the
controller is not operating. Cycle the AC source to restart the system.
vi. Ensure DC power is getting to the controller; check the fuse on the
rear of the power system. Measure the +28.5Vdc on the controller
JX.
vii. Replace controller. See page 4-7.