Unit installation

Troubleshooting and Maintenance
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5.4.14 Troubleshooting Problems
The first step in troubleshooting the problem would be to retrieve
the “Errors” message log file located in the KLM directory as
indicated in paragraph 5.4.12. The errors log file will provide some
information of what when wrong with the system.
The next step is to understand the “Power up Sequence of Events”
when you power up the FS system. By understanding the system
sequence of events it will help you in diagnosing where the problem
may be.
5.4.15 Power up Sequence of Events
What happens when you turn “ON” the Power/TTM?
1. When you turn ON the TTM you apply power to the Pre-
Regulator board located in the sonar head.
2. Next, the pre-regulator board applies power to the main power
supply.
3. Next, the main power supply board sets-up the voltages
required to run the sonar head.
4. Next the motor will lock up in position “will not rotate freely by
hand”.
If the Pre-regulator and Power supply boards are functioning
correctly, the TTM panel meter should indicate 200Vdc and a
current of approx 0.20 Amp.
Troubleshooting system power problems:
Check TTM Interface unit panel meters for voltage and
current, ensure unit is on and confirm voltage meter
indicates 200 VDC.
If no current is indicated then turn power off and disconnect
the third wire cable from the TTM Unit. Check wiring
continuity between the MS connector and the 2 pin
connector at the trawl unit. If OK, then the sonar head needs
servicing.