11
What do if it is not functioning?
Everything is running but still no changes on the computer value
1. When the engine is running, at least the signal should be send to the external device (remote calculator or Fleet Manager). If this is not
the case, do the following:
a. Check the cable for proper connection (see also section “Electrical connections and specifications”).
b. Is the flow meter connected the right way (look at the arrow on the body)?
c. Disconnect the flow meter from the fuel pipes.
Gently blow into the flow meter entry (look at the arrow). You must hear a quiet noise of the rotating rotary piston. If you hear nothing,
the flow meter is blocked. In most of the case, impurities are the reason for that.
d. Check the fuel and pipes for impurities. Use a filter before the flow meter (the mash size must be 0.08 mm for the VZD/VZP 4 and
0.1 mm for the VZD/VZP 8).
e. The best way to avoid impurities is to install the flow meter between the pre-filter und the fine-filter.
I did the above, but it is still not running
1. Install the VZP 4 or VZP 8 like described under VZP 4 or VZP 8 (installation on vehicle)
2. Take a volt meter and connect the plus to the green cable and the minus to the brown cable.
3. Set the volt meter to measure the voltage.
4. Put the ignition key to position ignition. You should read a value between 3 - 24 Volts (this value depend on the external calculator or
fleet manager and can be object to variation). Take in mind this value.
5. Start the engine. The now displayed value must drop continuously from before displayed value to a lower value and back.
6. If this is not the case, contact your local representative.
Electrical connections and specifications
VZP 4 and VZP 8
Explanation of the wires:
Pulse output
Pulse frequency = 1 / pulse period
Symbolic explanation of the „pulse output“ by flow meter
White
12 - 24 Volt DC for a blinking LED when a pulse is generated
Green
Pulse (this line must receive 12 - 24 Volt from remote)
Brown
Ground
Flow-
Pulse OUT
Pulse OUT
Pulse OUT
Current load
Sensor
value
width (fix)
frequency
(open drain output)
ml/pulse msec
Hz
mA
VZP 4
5.0
20
max. 4.5
max. 50
VZP 8
12.44
20
max. 4.5
max. 50
Summary of Contents for CONTOIL VZP 4
Page 6: ...6 Abmessungen VZP 4 VZP 8...
Page 12: ...12 Dimensions VZP 4 VZP 8...
Page 18: ...18 Dimensions VZP 4 VZP 8...
