Failure Diagnostics Of Rll Electronic Control System - Belarus 3522.5 Operator's Manual

2.14.4 Failure diagnostics of RLL electronic control system

The electronic control system BOSCH, installed on your tractor, has an option of
self-testing and whenever failures are detected it provides the operator with code informa-
tion by means of failure diagnostics annunciators 9 (figure 2.14.1) on RLL control panel.
After engine start, as specified in clause 2.14.2, the annunciator 9 is burning continuously
if no failures are detected in RLL control system. Moving the handle 7 up or down deacti-
vates the annunciator 9.
In case failures are detected in the system after the engine start the annunciator 9
begins to show code information a the failure. If necessary the system gets blocked.
The failure code is displayed as a two-digit number, where the first digit is equal to
the number of flashings of the annunciator 9 after the first long pause, and the second digit
is equal to the number of flashings after the second long pause. For example, the opera-
tion algorithm of the annunciator 9 is the following:
- engine start;
- continuous glowing;
- after the system is unblocked the annunciator goes out;
- three-time flashing of the annunciator;
- long pause (glow missing);
- six-time flashing of the annunciator.
- long pause (glow missing).
It means that the system has a failure with a code "36". If several failures are de-
tected simultaneously the system indicates failure codes one after another dividing them
with a long pause.
All failures are divided by the system into three groups: complex, medium and light.
If complex failures are detected the control is stopped and the system gets deacti-
vated. The system is not controlled either with the control panel or with the remote buttons.
The diagnostics annunciator shows a failure code. After the failure has been elimi-
nated and the engine started the system recovers.
With medium failures the control is stopped and the system gets blocked. The sys-
tem is controlled only with the remote buttons and is not controlled from the main panel.
The diagnostics annunciator shows a failure code. After the failure has been eliminated
and the engine started the system recovers.
With light faults the diagnostics annunciator shows a fault code, but the system re-
mains controlled and is not blocked. In case of light faults the RLL control system operates
improperly – there is no correct soil sensing. After the fault has been eliminated the diag-
nostics annunciator turns off.
In case the system detects a failure relating to any group of complexity the following
actions shall be taken:
o read the code;
o stop the engine;
o eliminate the failure in accordance with instructions of subsection 7.2 "Possible
failures in electronic control systems of RLL and FLL,guidelines for troubleshooting";
o start the engine and if there are no faults get down to work.
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