Tait TB8100 Service Manual page 226

Task 3 —
Check
Configuration and
Alarms
Task 4 —
Check Reported
Alarms
226 Power Management Unit Fault Finding
1. If you are testing a DC module, reset the DC supply to 13.8VDC
(27.6VDC) [55.2VDC].
2. Fit the front panel to the subrack.
3. Run the Service Kit and connect to the base station.
4. Once connected to the base station, ensure it is in Standby Mode.
5. Read the base station to load the PMU's configuration information
into the Service Kit.
6. Select Monitor > Module Details > Power Management and check
that the module details are correct.
7. Select Monitor > Monitoring > Power Management and check that
the power management details are correct.
8. Select Configure > Base Station > Miscellaneous and check that the
details in the Power configuration area are correct.
9. Select Configure > Alarms > Thresholds and check that the limits
entered in the PMU battery voltage fields are correct.
10. Select Alarms > Current Alarm Status and check for alarms. If there
are alarms, go to
on page 230, or
PMU.
Any alarms generated by the PMU under test will appear in the Alarms >
Current Alarm Status screen in the Service Kit. The most likely alarms are
described in more detail below.
For an explanation of how the operation of the PMU is controlled by fixed
hardware limits and user-programmable software limits, refer to
Operation on DC Input" on page
No PMU Detected
1. Check the input voltage is present and correct.
2. If no other alarms are present, check that the system control bus is
undamaged and correctly connected.
3. Check the subrack interconnect board for damage.
4. If alarm still present, replace the HVDC control and microprocessor
card and retest. If the alarm is still present, replace the AC module,
check the DC power ground to the reciter, then retest.
5. If the alarm is still present, return the PMU to your nearest CSO.
Task 4. If there are no alarms, go to
"AC Module" on page 240
237.
© Tait Electronics Limited September 2006
"DC Module"
if you are testing an AC
"PMU
TB8100 Service Manual