Westermo RM-505U-2-E - Manual (Page 38)

505U Radio Telemetry Module
Page 38 © September 2002
5 TROUBLESHOOTING
System Problems
Most problems relate to incorrect configuration, or radio path problems. Before installing the 505U
module, "bench-test" its operation with the receiving 105U module alongside. If the 505U does not
work properly in this test, it will not work properly installed. If problems are found, check the
configuration.
If the bench-test is successful, however problems are experienced after installation, check the radio
path (refer to the 105 User Manual for radio path testing).
The 505U provides the following diagnostic features which will help to identify problems.
LED Indicators.
Normally the green OK LED on the front panel will flash briefly every 10 seconds. When the OK
LED extinguishes a sleepmode state is indicated conserving the 505U's battery power. If the OK
LED does not flash, a flat battery condition or an internal failure may exist. If the 505U module is
located outside, then it will be difficult to see when the LED indicators are on. Remove the front lid
of the 505U to see the LED's better.
The yellow TX LED will flash whenever a radio transmission occurs.
Table of indicator conditions
INDICATOR CONDITION MEANING
OK LED ON Flashes briefly Normal Operation
OK LED OFF Continuously Battery Voltage low
CPU failure
OK LED ON Continuously Analogue loop on
Configuration cable connected
TX LED ON Flashes briefly Radio transmitting
Internal Battery Supply
A battery voltage of 3.0 volts or less indicates new batteries are required Measure the voltage
across all three batteries. The 505U module will stop operating if the battery voltage falls below 2.7
volts while transmitting.
Configuration data will not be lost when batteries are removed. When the batteriea are replaced,
the low battery status may need to be reset. This is done by connecting the module to the
configuration program and selecting “Read Inputs” - select “Battery Status Reset”. If the