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11-7
Chapter 11. Maintenance and Troubleshooting
z
Display unit does not work.
The following shows the possible cause and corrective action when the display unit
does not work.
Cause
Corrective action
The key lock is set.
Press and hold the button to unlock the key.
The display unit cable is disconnected.
Reconnect the display unit cable.
The display unit cable has a broken wire.
Replace the display unit cable.
The display unit has failed.
Request repair or replacement of the display unit.
The screen is broken.
Request repair or replacement of the display unit.
z
Nothing is shown on display unit.
The following shows the possible cause and corrective action when nothing is
shown on display unit.
Cause
Corrective action
The main unit power is turned off.
Turn on the main unit power.
The distance from the main unit to the
display unit is 30 m or more.
Make the distance from the main unit to the
display unit less than 30 m.
The display unit cable is not suitable.
Use a Cat5e or higher cable.
The display unit cable is disconnected.
Reconnect the display unit cable.
The display unit cable has a broken wire.
Replace the display unit cable.
The display unit has failed.
Request repair or replacement of the display unit.
The main unit has failed.
Request repair or replacement of the main unit.
z
An error is indicated on the display unit
The following shows the possible causes and corrective action when an error with a
red background is shown on the display unit.
Error type
Cause
Corrective action
Connection error
Some of the wires in the display unit cable
are broken.
Replace the display unit cable.
The display unit has an external power
source and the display unit cable is
disconnected.
Reconnect the display unit cable.
The display unit has an external power
source and the main unit power is turned off.
Turn on the main unit power.
The display unit has an external power
source and the power of the main unit only
has been turned off previously.
Turn off the display unit power and then
turn it on again.
Note If the firmware version of the MAIN
block is 4.x.x (where x stands for any
number) or later, recovery from the
error is automatic when the main unit
power is turned on.
The integrating cable was wired incorrectly.
Correctly wire the display unit side ferrule of
the integrating cable.
Configuration error
The Model No. and loop type setting are not
compatible.
Set the loop type again using the SLP-C7
Smart Loader Package.
11 - 3 Display Error