Hach LXV525.99A15551, Руководство пользователя

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Section 8 Troubleshooting
Problem Possible cause Solution
Controller will not
power up, or powers up
intermittently. Power is not supplied to
the controller. Make sure that the power cable is connected to the
controller.
Make sure that the power connections are properly
terminated in the controller.
Make sure the power strip, line power, wall plug are all
properly plugged in.
Make sure that the controller is connected to the correct
power source: 100-240 VAC for AC controllers and
18-28 VDC for DC controllers.
Contact technical support.
The controller shows a
sensor warning or
error. The sensor reported a
warning message. Refer to the sensor warning description shown in the
device detail screen and to the sensor user manual.
The measurement is not
correct because of a
sensor error. Refer to the sensor warning description shown in the
device detail screen and to the sensor user manual.
"Unknown device
connected" message The rotary switch of the
sensor module is not set
correctly. Set the rotary switch of the sensor module to the correct
position for the sensor type. Refer to the sensor module
documentation.
Sensor is not
recognized. Too many devices
installed Make sure that only two input devices are connected to the
controller. If more than two input devices are connected,
the controller will see only two of the devices.
Input devices are analog inputs from external devices,
analog sensors, digital sensors or analyzers.
If a digital sensor and two analog modules are connected,
only the two analog modules are seen by the controller.
Analog modules are 4–20 mA input modules and sensor
modules.
Two devices are
connected to the same
channel Make sure that the analog module and the digital sensor
are not connected to the same channel. Refer to items
3 and 4 in
Figure 6 on page 13. The analog module slots
are internally connected to the channel (Slot 3 = Channel
1, Slot 4 = Channel 2).
If a digital sensor and an analog module are connected to
the same channel only the analog module is seen by the
controller.
Analog modules are analog input modules and sensor
modules.
Extension cable damage If applicable, remove extension cables from the sensors
and directly connect the sensor to the controller.
Connect the sensor to a different controller to identify if
there is sensor damage.
The communication
between the sensor and
the controller is defective. Examine the sensor and the sensor cable for damage. If
damage is found, contact technical support.
If no damage is found, disconnect the sensor, wait
15 seconds, then connect the sensor again. Contact
technical support if the communication failure shows again.
The sensor version is not
applicable to the
controller. Make sure that the sensor is applicable to the controller.
Contact technical support.
The sensor firmware is
not applicable to the
controller. Make sure to update the sensor firmware to the latest
available version. Refer to
Install controller firmware
updates on page 29.
English 45