25
TCD 2022 / 2042
EN
INSTALLATION AND USE MANUAL - REV 002A
5.1 -
Automatic reset problems
Problems of this type are reset automatically, as soon as the cause that has generated the problem disappears.
Insufficient voltage supply
The signalling occurs only when the control is enabled.
The problem is signalled if the power supply voltage drops below 10.5Vdc for more than one second. Resetting after
this problem occurs if the power supply voltage exceeds the threshold of 11.5Vdc for more than one second. Check the
charge state of the battery group that supplies power or the electrical circuit.
In the presence of this problem the enabling LEDs flash slowly and a sound is emitted when they turn off.
Pressing opposite buttons (TCD 2022)
If both direction buttons are pressed by mistake, the direction LEDs flash and the command to the thruster is interrupted.
As soon as the direction buttons are released the LEDs go off and the control is ready for new operations.
Protection against prolonged motor activity
After about 5 minutes and 40 seconds of continuous (or equivalent) use of the thruster, the thruster control is disabled
for 20 minutes, time needed for the partial cooling of the relevant thruster (total cooling usually takes about 40 minutes).
Whenever this problem occurs, the relevant green and red direction LEDs flash together whit the enabling LED with an
intermittent sound alarm (the duration of this sound alarm is 10 seconds per minute).
The system saves this partial cooling time elapsed for the thruster; if the system is accidentally turned off (power cut off
to the relevant TCD unit) before 20 minutes elapse, upon re-starting, you will have to wait for the remaining partial cooling
time before using the control of the thruster.
Once this partial cooling time is over, you will be able to use the thruster control again for a period of time calculated by
the system and proportional to the time the thruster was not used (which may be less than 5 minutes and 40 seconds).
Once the total cooling time is over, the thruster can be used again for 5 minutes and 40 seconds.
5.2 -
Manual reset problems
The control will signal, with a certain number of flashes of the enabling LEDs, the presence of any manual reset problems.
Together with the flashes a short sound can be heard.
Correlation table between the flashes and the manual reset problems
Problems of this class are reset, once the cause that has generated them has been removed, by switching the control off
and on again.
When problems 3, 4, 5 are present, it may be necessary to turn off and on again the external devices that signalled the
problem. Refer to their installation and use manual.
5.0 - SYSTEM PROBLEMS
no. of ashes
PROBLEM DESCRIPTION
1
Overload on the
command electrical
line
The problem is signalled when the control detects a short circuit or an overload on the
command electrical line of the thruster. Check the wiring of the electrical line of the control
to the thruster and the absorption of the contactors installed on the thruster.
2
Interruption on the
command electrical
line
The problem is signalled when the control detects an interruption on the command electrical
line of the thruster.
Check the wiring of the electrical lines of the control to the thruster.
3
Problem present on
the BTR* propeller.
The control system of the BTR propeller has detected a problem.
Refer to the BTR use and maintenance manual.
4
Problem present in
the parallel/series
switch*
The control system of the PSS switch has detected a problem. Refer to the PSS use and
maintenance manual.
5
Problem present on
TMS*
The TMS line switch has detected a problem connected to the control contactor of the
thruster. Refer to the TMS use and maintenance manual.
* If installed.
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