Error and remedy, 1 error in lcd display, 2 error of key – Dwyer PUX User Manual

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11. ERROR AND REMEDY

11.1 Error in LCD Display

If an error occurs, refer to Table below.

11.2 Error of key

Status

Cause

Remedy

No display appears.

• Power supply is not turned on.

• Voltage is low.

• Fuse has blown.

• LCD is abnormal.

• Connection of DC power supply

is reverse in polarity.

Irrational display

Display is not clear.

Entire display is blackish.

• Hardware error

•

Ambient temperature is high
(50

or higher)

LCD has reached the end of its
service life.

Lower the temperature.

Replace the LCD.

• Ambient temperature is high

(50

or higher)

Lower the temperature.

See section 10 (4) "Replacement of LCD"

• Line voltage is low.

• LCD is abnormal.

No response is made to key
input.

• Hardware error

Any particular key does not
function or functions in a
wrong way.

BULLETIN F-68