DECrepeater 90TS Installation and Configuration
49
Problem Solving Using the LEDs
When diagnosing a problem with the module, note that the problem is often indicated
by the states of the module LEDs. Table 3 lists the states of the LEDs for various error
conditions that can occur during initial installation of the device, along with probable
causes and corrective actions to take.
Normal Powerup
When power to the module is initially turned on, the following events occur:
1. The Power
LED lights and stays lit.
2. The module initiates its built-in self-test. During self-test , the Port State LEDs
cycle through various patterns.
3. After the successful completion of self-test (within 30 seconds), the Module
OK
LED lights, and remains lit.
4. The remaining LEDs indicate their operational status, as described in Table 3.
Table 3
Problem Solving Using the LEDs
Symptom
Probable Cause
Corrective Action
All LEDs are off
The module does
not have power.
If the module is installed as a standa-
lone unit:
Secure the power cables at the back
cover and between the power supply
and the wall outlet.
Check the wall outlet using another
appliance or light, or plug the power
cord into another outlet. If no power is
available, check the wall outlet’s circuit
breaker.
If the problem persists, replace the
power supply or the module.
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