Troubleshooting Power Problems; Table 7-2: Troubleshooting Power Problems - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
To use the troubleshooting table:
1. Identify the closest description of the trouble symptoms under "Symptoms".
2. Perform the required corrective actions listed under "Corrective actions" in the order they appear,
until the trouble is corrected.

7.4.1 Troubleshooting Power Problems

Table 7-2: Troubleshooting power problems

No. Symptoms
1 RAP POWER ON
indicator off
ECI Telecom Ltd. Proprietary
Probable cause
Both main and backup power
sources failed
Equipment problem
Corrective actions
Check the site power distribution

system.
Check the DC voltage at the main

and backup power terminals of the
RAP.
If the voltage is not within the

correct range, check cable
connections up to the DC power
distribution panel and make sure no
fuses are blown.
Check the voltage supplied by the

main and backup power sources.
Check the power connections to the

RAP.
Check the circuit breakers in the

RAP and replace if necessary.
Check the voltage at the NPT-1020

and EXT-2U end of each power
cable. Replace the cable or repair
the RAP if there is no voltage
present.
Check and reconnect cables to the

equipment, one by one. If the circuit
breaker trips again when connecting
a specific unit, replace that unit.
Maintenance
7-3