User's Manual

Page 18
7 Servicing and Troubleshooting
Error Codes
On a Host device a normal LED light sequence consists of a number of Green LED
(Light Emitting Diode) flashes whenever you plug in the battery or push the Inventory
Request button (S1). Following the initialization period the Red and Green LED will
flash alternately. During this time communicaton is occurring between the
Host/Client(s).
After a few seconds the LED should blink more slowly. This indicates it is talking with
the Cellular Network. Next the light stops blinking and stays on continuously. The Series
90 is now transmitting information to the Network. This part can take a couple of
minutes. Once the process is finished the light will blink quickly and go off.
If an error occurred during the process the red light would appear and the green light
would go out. After a short pause the green light would blink indicating one of the error
codes shown below.
On a Client device the LED sequence is shorter. Upon pressing the start button the green
LED will blink for two seconds and following that initialization period the red and Green
LEDs will blink alternately. This indicates the Client is attempting to establish
communication with a Host within range.
If the data transmission was not successful, a red LED will light and remain lit while the
green LED flashes the error codes below.
Host Operation
Number of
Green Flashes
Error Code Description
4
Cellular Service Error: The unit did not detect cellular service. Verify
that there is service in the area using the technique in Section 4.2 or
check GSM coverage information on Websites in Section 4.6. Ensure
that the antenna is tightly connected to the unit and is vertical.
5
Cellular Busy Error: The Series 90 could not transmit because the
cellular network is busy. Re-try data transmission.
6
Radio Respond Error: The Series 90’s wireless transmitter did not
respond to the command. Re-try a data transmission. If this problem
continues, replace the Series 90 unit.
7
Low RSSI Error: The data transmission failed due to low signal
strength Error Code 7 in Section 7.1. Apply the technique indicated in
Section 4.3 to establish the best location for an external antenna to
improve the signal strength.