YOKOGAWA UM33A User Manual

15-1
IM 05P03D21-01EN
Troubleshooting, Maintenance, and Inspections
15
15.1 Troubleshooting
15.1.1 Troubleshooting Flowchart
If the Operation Display does not appear after turning on the indicator’s power, follow the
measures in the procedure below.
If a problem appears complicated, contact our sales representative.
Is the indicator
defective?
Contact us for repair. Problem solved.
No communication
capability
Completely
inactive?
Yes
Yes
Yes
No
No
No
Key
operation
failure?
Yes
No
Yes
Check wiring on the
power terminals.
Check the key lock
setting.
Display
failure?
*
Yes
No
Turn off power, and
then turn it on again.
I/O signal
failure?
Yes
No
Check the I/O specifications
of the indicator.
Check the
supply voltage.
Check the
specifications and polarity
of connected devices.
Check the communication-
related parameters.
Check the specifications
of communication
devices.
Check the
communication wiring.
Communication
failure?
No
With
communi-
cation?
Yes
Normal?
Is the
key locked?
Check the specifications
of the indicator.
Yes
No
Correct?
Correct the error(s).
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
function is not affected.
Chapter15Troubleshooting,Maintenance,andInspections

YOKOGAWA UM33A Specifications

General

Brand	YOKOGAWA
Model	UM33A
Category	Touch Panel
Language	English