Tait TB8100, Service Manual

Page: 228 / 306

228 Power Management Unit Fault Finding TB8100 Service Manual
© Tait Electronics Limited September 2006
Battery Voltage High / Battery Voltage Low / Battery Protection Mode
1. Check that all the module details are correct, as described in Task 3 .
2. Check that the voltage at the DC input terminals is correct.
3. If the alarm is still present, replace the battery control card and return
to
Task 1 .
4. If the fault is still present after retesting, replace the DC module.
Temperature High / Output Voltage High / Output Current High
1. Replace the HVDC control and microprocessor card and return to
Task 1 .
2. If the fault is still present after retesting, select Monitor > Module
Details > Power Management to determine which module is faulty
and replace that module.
Output Voltage Low
1. Check that the PA is powered up, and is being detected by the Service
Kit (Monitor > Alarms > Current Alarm Status). If it is, replace the
HVDC control and microprocessor card and return to
Task 1 . If it is
not, go to Step 2 .
2. Check the Output Current High alarm. If it is on, disconnect the
PA from the PMU. If the alarm is sill present, go to Step 4 . If it is
not, go to Step 3 .
3. Check the Battery Protection Mode alarm. If it is on, refer to
action for that alarm above. If it is not, go to Step 4 .
4. Select Monitor > Module Details > Power Management to
determine which module is faulty and replace that module.