User Instructions

Instruction Book Of RDT401B 2017-T401-E005
8
IV. Failures and Solutions thereof
If you experience the following problems when using the product, please resolve the failures with
the aid of the following countermeasures.
The general problems that may have an impact on this product are as follows:
Table 4
Failures
Possible Causes
Solutions
No warning sounds when eyes
are closed for a long time.
The driver's face is
out of the visible
scope of the camera
or beyond the
effective distance.
Referring to the Instruction Book,
adjust the position or angle of the
device placement.
The vehicle is in a
stopped state.
The fatigue warning function will be
activated only when the vehicle’s
speed exceeds the set speed value.
GPS satellite search
fails.
Make sure that the GPS antenna is in
good contact and that the top of the
antenna or the location of the vehicle
is not covered.
The device cannot boot up
The ACC and power
supply are not well
connected.
Make sure that the power supply
wiring harness is reliably connected.
The fatigue warning is not
sensitive.
The black Plexiglas
in front of this
product is too dirty.
Clean this brown and black Plexiglas.
The installation
distance is too close.
Install the product at an appropriate
distance.
No warning is triggered when
the driver looks around.
Calibration is not
completed.
Maintain a correct posture for 10s in
test mode and when hearing a beep-
beep tone, you can test the posture
warning.
The device is not on the line.
The SIM card is not
inserted, or in arrears
state.
Check the SIM card, start the device
to hear a tone indicative of the
successful network connection, when
the device can be on the line.