Paradyne Jetstream CPX-1000 Installation And Operation Manual page 113

1000-A2-GN22-00
Step 2
Table 4–9. Power Failure Troubleshooting
Symptom
All CPX plug-in
module indicators are
off.
power
Out Of Service
supply module
indicator is lit.
None of the Power
Supply module
indicators are lit.
Cooling failure on one
power supply.
Cooling failure for
more than one power
supply.
February 2003
Note
The CPX may take several minutes to initialize,
depending on the number of PSTN and ATM modules.
Check the CPX plug-in module indicators to verify that they are
operating correctly. If any indicator states are incorrect, identify the
module type and refer to the appropriate table for action.
Probable Causes
A power surge tripped the
CPX circuit breaker.
Faulty –48 Vdc output
wiring, from the plant
battery distribution point
to the CPX.
-48 VDC plant battery
source is faulty.
Power supply module is
faulty.
CPX is not powered up.
Fan failure or jammed fan
shutter.
Airflow blockage.
Excessive ambient air
temperature.
Corrective Action
Turn the circuit breaker on to apply
power to the CPX.
1. Check the -48 Vdc and battery
return connections between the
power source and CPX A and B
terminals (see Figure 4–2
2. Replace faulty wiring as required.
1. Verify that the -48VDC plant battery
has the correct polarity.
2. Measure the plant battery voltage at
the power distribution point
(–42 VDC to –56 VDC).
Replace the module (see
Supply/Fan Module on page 5-3).
Perform system power failure
troubleshooting.
Replace the power supply.
1. Check air inlets and outlets for
obstructions.
2. Clean or replace the air filters.
Reduce the room air temperature.
4. Troubleshooting
).
Install Power
4-13