Chapter 16 Troubleshooting, Maintenance, And Inspections; Troubleshooting; Troubleshooting Flowchart - YOKOGAWA UT Advanced UT32A User Manual

Chapter 16 Troubleshooting, Maintenance, and Inspections

16.1 Troubleshooting

16.1.1 Troubleshooting Flowchart
Is the controller
defective?
Yes
No
Completely
inactive?
Yes
Check wiring on the
power terminals.
Check the
supply voltage.
No
Normal?
Correct the error(s).
No
Correct?
Yes
Contact us for repair. Problem solved.
IM 05P01D31-01EN
If the Operation Display does not appear after turning on the controller's power, follow
the measures in the procedure below.
If a problem appears complicated, contact our sales representative.
Key
No
operation
failure?
Yes
Check the key lock Turn off power, and
setting. then turn it on again.
No
Is the
key locked?
Yes
Yes
Cancel the setting.
*: The LCD (a liquid crystal display) is used for a display portion of this product. The LCD has
a characteristic that the display action becomes late at the low temperature. Additionally,
the luminance and contrast degradation are caused due to aged deterioration. However, the
control function is not affected.
No
Display I/O signal
failure? failure?
*
Yes Yes
Check the I/O specifications
of the controller.
Check the
specifications and polarity
of connected devices.
No
Communication
failure?
Yes
Check the specifications
of the controller.
No
With
communi-
cation?
Check the communication-
No communication
capability related parameters.
Check the
communication wiring.
Check the specifications
of communication
devices.
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