User's Manual

GlobalTrak ™ Field Setup and Diagnostic Guide
Appendix C: Troubleshooting
Problems with Sensor Modules
Symptom Possible Cause Solution
Optic Sensor out of range Optic sensor is in direct
sunlight or other bright light
which saturates sensor
Move the unit from the light
source or cover the optic sensor
window
The optic sensor is damaged or
otherwise faulty
Replace the optic sensor or
Switch CMU to a different unit or
If the optic sensor reading is
unnecessary for deployment,
note the problem and continue
with installation
Acoustic sensor out of range CMU is in a loud area that is
pushing the sensor out of
range
Move the unit to a quieter area
The acoustic sensor is
damaged or otherwise faulty
Replace the acoustic sensor or
Switch CMU to a different unit or
If the acoustic sensor reading is
unnecessary for deployment,
note the problem and continue
with installation
Temperature(internal)
sensor out of range
The CMU is in an extremely hot
or cold environment
Use the temperature conversion
formula* to match the CMU
temperature reading to the actual
temperature
The temperature sensor is
damaged or otherwise faulty
Replace the temperature sensor
or
Switch CMU to a different unit
Temperature(external)
sensor out of range
The CMU external temperature
sensor is in an extremely hot
or cold environment
Use the temperature conversion
formula* to match the CMU
temperature reading to the actual
temperature
The temperature sensor cable
is not connected properly
Disconnect temperature sensor
assembly and reconnect
The temperature sensor
assembly is damaged or
otherwise faulty
Replace the temperature sensor
assembly
Door sensor fail (open or
close)
The door sensor and magnet
are too far apart when the door
is closed
Move the magnet closer to the
sensor
The door switch cable is not
connected properly
Disconnect and reconnect the
door switch cable
The door switch cable is
damaged or otherwise faulty
Replace the door switch cable
* Temperature(°C) = ((((Temp
reading
*3.3)/1023)-0.1)/0.01)-40
Prepared: R. Straz Date: May 31, 2006 Page 16 of 17