Dwyer UXF3 - Manual (Page 119)

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6.6. ERROR AND REMEDY
6.6.1. Display error
State Probable cause
Nothing is displayed.
z Power supply is not turned on.
z Low power supply voltage
z Fuse is blown out.
z LCD error Ÿ Refer to “6.6.7. Remedying a hardware fault”.
z Reverse polarity of DC power supply
Upper side appears black.
z Low power supply voltage
z Reverse polarity of DC power supply
z LCD error Ÿ Refer to “6.6.7. Remedying a hardware fault”.
Irrational display
z Hardware error Ÿ Refer to “6.6.7. Remedying a hardware fault”.
Pale display
z Ambient temperature is low (-20qC or lower) Ÿ Increase temperature.
z LCD has reached the end of its service life. Ÿ Replace the LCD.
Entire display is blackish.
z Ambient temperature is high (50qC or higher) Ÿ Decrease temperature.
LCD characters are skipped.
LED does not come on
z Refer to “6.6.1.1. Checking the LCD/LED” for LCD/LED.
The dots on the LCD are missing or the LED does not come on.
Ÿ Refer to “6.6.7. Remedying a hardware fault”.
LED is displayed in red. z Received wave is abnormal.
Ÿ Refer to “6.6.1.2. Checking the LED lit in red”.
6.6.1.1. Checking the LCD/LED
Follow the procedure shown below to check possible display errors.
Key operation Description Display
ź
Press the key 4 times to display “MAINTENANCE MODE”.
MAINTENANCE MODE
ENT
ź
Press the ENT key once to display “RAS INFORMATION”.
RAS INFORMATION
0000000000000000
ź
Press the key 12 times to display “LCD/LED CHECK”.
LCD/LED CHECK
ENT
ź
Press the ENT key once.
z m Lit in red
ź
Every time the key is pressed, the display is switched in the order
shown below.
LCD: OFF completely LED: Lit in green
LCD: Darkened LED: Lit in red
If dots on the LCD are missing or the LED does not come on, the
LCD/LED may have failed.
z m Lit in green
ESC Obtain a measurement-mode display using the ESC and the
keys.
0.000 m/s
0.000 m3/h
Bulletin F-107-UXF3