INF-TN1FSH-E
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6.2. Faults and remedies
6.2.1. Display error
State Cause
Nothing is displayed.
•
Power is not turned on.
•
Power supply voltage is low.
•
Blown fuse
•
LCD failure
•
Reverse polarity of DC power
supply
⇒
To “6.3.4. Measures against hardware failure”
Left or right side appears black.
•
Power supply voltage is low.
•
Reverse polarity of DC power
supply
•
LCD failure
⇒
To “6.3.4. Measures against hardware failure”
Random display
•
Effect of noise from outside
•
Hardware failure
⇒
Ground the grounding terminal on the flow
transmitter case.
⇒
To “6.3.4. Measures against hardware failure”
Pale display
•
Ambient temperature is low
(less than
−
20
°
C)
•
When temperature cannot be
increased
•
The LCD has come to the end
of its service life.
⇒
Increase temperature
⇒
Adjust the contrast of the LCD.
⇒
Replace the LCD.
The entire display appears black.
•
Ambient temperature is high
(50
°
C or higher)
•
When temperature cannot be
decreased.
⇒
Decrease temperature.
⇒
Adjust the contrast of the LCD.
6.2.2. Key failure
State Cause
Nothing happens if key entry is
made.
•
Hardware failure
⇒
To “6.3.4. Measures against hardware failure”
Specific keys do not respond.
Keys do not operate according to
definition.
