Fault Finding; Setting The Display - Grundfos Conex DIA-G Montage- Und Betriebsanleitung

12.2 Fault finding

Fault
1. No display
following start-up.
2. Display
permanently at
zero.
3. Display with
measured value
unsteady.
4. Measured value
display slow or no
measured value
display.
5. Sensor zero point
increases
disproportionately.
6. Sensor fault
(amperometric
sensor).
7. Sensor fault
(potentiostatic
sensor).
8. CAN interface
fault.
9. Data for
potentiostatic
sensors not read.
10. Potentiostatic
sensor provides
faulty measured
values.
11. Device cannot be
set.
Cause
a) No power supply.
b) Display contrast too light/too dark.
a) Open circuit in cable between
sensor and gas warning device.
a) Interferences on cable from sensor. Check that the display is properly
b) Sensor faulty.
a) Sensor too old.
b) Sensor dirty.
a) Sensor has been subjected to
humidity.
a) Sensor not connected.
b) Cable faulty.
c) Sensor faulty.
a) Cable faulty.
b) Sensor faulty.
c) CAN address on sensor interface
set incorrectly.
d) Termination resistor not set on
sensor interface and/or on Conex
DIA-G.
a) Connecting line interrupted.
a) CAN address on sensor interface
set incorrectly.
b) Termination resistor not set on
sensor interface and/or on Conex
DIA-G.
a) Sensor faulty.
a) Incorrect code set (device is
protected from any adjustments).
Remedy
Connect the power supply.
Set the contrast in the "Setup" menu.
See section

11.8.9 Setting the display

contrast.
Check the connecting cable, and
establish connection.
connected.
Route the cable separately from the
power supply cables.
Replace the sensor.
Replace the sensor.
Replace the sensor.
Replace the sensor.
Connect the sensor.
Replace the cable.
Replace the sensor.
Replace the cable.
Replace the sensor.
Check and modify the CAN address on
the sensor interface.
Check and modify the termination
®
resistor on the sensor interface and/or
®
on the Conex DIA-G.
Check the connecting line, and establish
connection.
Check and modify the CAN address on
the sensor interface.
Check and modify the termination
®
resistor on the sensor interface and/or
®
on the Conex DIA-G.
Replace the sensor.
See section 11.8.8 Code function.
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