ETS ETS.A, Operating Manual

Page: 20 / 24

Manufacturer
www.ets-by.by
Distributor
www.metrotec.ee
20
7 Troubleshooting
Typical Errors and Instructions for Fixing These
Error
Error Description Instructions for Fixing
Oscillator
frequency
equals 0
Code: 1.4 V
Description: oscillator not working, the
sensor does not measure fuel level.
Explanation: the error is either occasional
(parts shorted by water when in motion) or
permanent (in the case of mechanical
shorting of wires or sensing tubes) character.
When the cause of the error is removed,
normal operation resumes.
Cause: shorting of the tubes of the sensing
assembly
–
either there is water in the fuel
or a mechanical short-circuit is present.
1. Allow the sensor to dry, drain
water from the tank;
2.
Fix the mechanical short-circuit.
With the sensor switched off, use a
tester
to measure resistance
between the tubes of the sensing
assembly. The measured value
should be in the range of
460…500 kΩ
.
EEPROM read
error
Code: 1.8 V
Description: The parameters that were set
when the sensor was calibrated have
become corrupted.
Explanation: the error manifests as soon as
the sensor is switched on and is permanent,
i.e. the output signal value is not affected by
immersing the sensor in fuel or by shorting
its electrodes.
Cause: possible damage by static discharge
when cutting the sensor to length.
1. Short-circuit the electrodes of the
sensing assembly by means of a
metallic object. If this does not
change the output signal of the
sensor, the sensor is not functional
and has to be replaced.
2.
If shorting the electrodes changes
the output signal of the sensor, either
the measuring device that is being
used has a fault or has been
connected incorrectly. Measure the
output voltage using a properly
functioning device that has been
connected correctly for voltage
measurement.
Upper limit of
range
exceeded
F > Fmax +10%
Code: 2.0 V
Description: at low levels, the sensor
’sticks’
at zero, subsequently displaying the error.
Explanation: the error is manifested when
the sensor
is ’dry’
. When the sensor is
immersed in fuel and after passing the dead
zone, normal operation resumes.
Cause: the sensor has been cut by more than
10% (for non-cuttable sensors), or by more
than 60% (for cuttable sensors). The sensor
has been incorrectly calibrated. Damage to
the sensor’s electrodes
.
1. Calibrate the sensor. If this does
not fix the problem, contact the
manufacturer.