Instructions for Use
– SCHMIDT
®
LED Measured Value Display MD 10.010
Page 19
8 Service information
Eliminating malfunctions
The following table lists possible errors (error images). A description of the
way to detect errors is given. Furthermore, the possible causes and
measures to be taken to eliminate errors are listed.
Error image
Possible causes
Troubleshooting
Displays off, and
analog output to zero
Supply voltage U
B
:
No U
B
present
U
B
(DC) has wrong polar-
ity
U
B
too low
Device defective
Supply voltage:
Check if connected cor-
rectly to control unit
Check voltage type
(DC, AC)
Check if there is supply
voltage at the terminal
(cable break)
Measuring range too large
/ small
Erroneous configuration of
sensor's measuring range
Check if analog measured
value is correct (
)
Check configuration of
start (
) and end value
(
) of sensor's measur-
ing range
Analog measuring value
(
) too large / small
Jumper of signal mode ana-
log input
Set jumper according sig-
nal mode
Input configuration
Check input configuration
(
) according to input
signal
Analog signal too large /
small
Output configuration
Check configuration
Unexpected values at
alarm output
Configuration of alarm out-
put
Check configuration
Table 4
