ZyXEL Communications PLA4201 V2 User Manual

 Chapter 6 Troubleshooting

PLA Series User’s Guide

• Check you are using the latest version utility. Earlier version utilities cannot communicate with 

PLAs using the latest firmware. If you do not have the latest utility, download it from the ZyXEL 
website.

• If you are running another tool such as the Firmware Detection Tool, the utility will not detect 

your local device.

• If your computer has more than one network interface card (NIC), make sure you select the right 

NIC to which the PLA is connected in the utility’s Configuration screen.

Your powerline adapters may be connected to electrical surge protectors. Connect them to standard 
power outlets.

Your powerline adapters may be located close to large appliances such as refrigerators or air-
conditioners that cause interference with the powerline signal. Move the adapters further away 
from such appliances to reduce interference. 

Your powerline adapters may be placed close to electrical devices such as electrical insect-killers 
which produce radio waves. These may interfere with the powerline signals. Move the adapters 
further away from such electrical devices.

Your wiring may be old and/or low quality or with a long wiring path. 

This section applies only to PLAs with the RESET/ENCRYPT button. 

In this guide RESET/

ENCRYPT refers to the ENCRYPT button in PLAs that have separate RESET and 

ENCRYPT buttons. 

Refer to 

 to see which models have separate RESET and 

ENCRYPT buttons.

The HomePlug light is already on, but I haven’t pressed the RESET/ENCRYPT button yet.

Your device has already connected to another powerline device. Press the RESET/ENCRYPT 
button for 5 to 8 seconds to release the connection.

The POWER light does not blink when I press the RESET/ENCRYPT button.

• Check the device is on.