Paradyne CPX-1000 manual CPX may take several minutes to initialize, Power Failure Troubleshooting

1000-A2-GN22-00 4. Troubleshooting

	Note
	The CPX may take several minutes to initialize,
	depending on the number of PSTN and ATM modules.
Step 2	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.

Table 4–9. Power Failure Troubleshooting

Symptom	Probable Causes	Corrective Action
All CPX plug-in	A power surge tripped the	Turn the circuit breaker on to apply
module indicators are	CPX circuit breaker.	power to the CPX.
off.
	Faulty –48 Vdc output	1. Check the -48 Vdc and battery
	wiring, from the plant	return connections between the
	battery distribution point	power source and CPX A and B
	to the CPX.	terminals (see Figure 4–2).
		2. Replace faulty wiring as required.
	-48 VDC plant battery	1. Verify that the -48VDC plant battery
	source is faulty.	has the correct polarity.
		2. Measure the plant battery voltage at
		the power distribution point
		(–42 VDC to –56 VDC).
Out Of Service power	Power supply module is	Replace the module (see Install Power
supply module	faulty.	Supply/Fan Module on page 5-3).
indicator is lit.
None of the Power	CPX is not powered up.	Perform system power failure
Supply module		troubleshooting.
indicators are lit.
Cooling failure on one	Fan failure or jammed fan	Replace the power supply.
power supply.	shutter.
Cooling failure for	Airflow blockage.	1. Check air inlets and outlets for
more than one power		obstructions.
supply.		2. Clean or replace the air filters.
	Excessive ambient air	Reduce the room air temperature.
	temperature.

February 2003 4-13