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NPT-1020 Installation and Maintenance Manual
Maintenance
ECI Telecom Ltd. Proprietary
7-4
No.
Symptoms
Probable cause
Corrective actions
2
All LEDs and fans in
NPT-1020 off
No input power to the
corresponding unit
Check the corresponding circuit
breaker in the RAP, and reset any
tripped breaker.
Check the circuit breakers in the
RAP and replace if necessary.
If the circuit breaker trips again,
disconnect the cable protected by
the corresponding circuit breaker
from the equipment, and check the
voltage polarity.
Check the power cable condition
and make sure the cable is not
damaged and does not cause short
circuits.
Check proper cable connection at
both ends.
3
NPT-1020 card
FAIL indicator on
Technical failure in the
corresponding unit
Consult General troubleshooting
procedures for NPT-1020 power-on,
based on LEDs on its front panel for
guidance in resolving the problem.
If the problem still exists after Step
1, replace the unit.
7.4.2
Troubleshooting Using Component Indicators
The management station will usually provide onsite personnel with a list of suspected components.
Start the troubleshooting of a suspected component by checking its indicators. These indicators, located on
the various cards and modules, can help you to rapidly and efficiently identify a malfunctioning component
in accordance with the procedures outlined in the following tables.
N
OTE
: For a description of indicator functions, see the
NPT Product Line Reference Manual.
C
AUTION
: The following corrective actions are traffic-affecting.