Troubleshooting Guide
Copyright © 2005-2012 Sentek Pty Ltd All rights reserved
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Once a problem has been flagged, troubleshooting should be carried out in this order:
1. Download all data and review graphs, looking at all sensors for problem symptoms and causes.
2. Before picking up any tools, moving cables or altering the system in any way, connect to the probe in PConfig and identify what the current fault is.
If you miss this step, you will not know whether you have fixed the original problem or not.
Tip:
Upload readings and back up probe configuration before changing any probe settings.
3. Using Table 5 below as a starting point, begin finding the cause of the fault. Change only one thing at a time and then check to see if it has
changed the original symptom of the fault. Try something else if the symptom has not changed.
4. Once the cause and symptom have been found and rectified, test all sensors and upload operation in PConfig. If a new symptom appears, start
Tip:
Disconnect 12V battery and solar panel when servicing the DTU; this includes any wiring to the connectors or whenever the
antenna is to be disconnected.
Table 5 Troubleshooting
Symptom/Error Message
Possible Cause of Failure
Check
Possible Solution
Cannot connect to probe with
PConfig
Wrong COM Port selected in PConfig
Check COM Port number in
Windows Device Manager
Ensure cable drivers are installed and correct
COM port is selected
Low power supplied to interface
Measure DC voltage at
interface connector and DTU
points X8, F2 & X1
Replace battery
Replace corroded wires or connectors
Re-strip and connect all wires
Replace F2 fuse
Power switched off
Check DTU power switch
Ensure switch is in the On (|) position
PConfig cable not connected
Visual check
Make sure cable is fully connected with TTL port
on interface
Note:
The USB port supplied voltage cannot be
used to power the interface
Poor probe cable wiring at DTU or
Probe (specifically power and ground
wires)
Use Plus manual to check
wiring configuration
Re-terminate all connections