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GT20 Wire and Programming Manual
www.NabcoEntrances.com
P/N C-00140
Rev 5-7-18
Erroneous Behavior
Analysis
Possible Causes
Remedy
Drive Unit fails to open
X
X
LED SE (Safety Sensor, yellow) is OFF
X
X
LED OE (opening command, blue) reacts
to the Activation Sensor
X
X
Determine the Activation Sensor via the
diagnostic level
Depending on the
enabled operating
mode, activation
commands (inside/
outside, etc) are
ignored
X
X
Switch on the main power switch
on the Side Cover
X
X
Measure the main supply voltage,
check the cabling and eliminate
any detected deficiencies
X
X
Should the two above-mentioned
measures not be successful, the
Control Unit needs to be replaced
X
X
LED SE (Safety Sensor, yellow) is OFF
LED OE (opening command, blue) is OFF
despite the active Activation Sensor
The opening
command is not
evaluated
X
X
Check the cabling between the
Activation Sensor and the Control
Unit and eliminate any detected
deficiencies
X
X
Replace the Activation Sensor
Drive unit fails to close
LED SE (Safety Sensor, yellow) is ON
One or more Safety
Sensors are active or
incorrectly cabled
X
X
Remove the obstacle
X
X
Check the cabling between the
Safety Sensor and the control
unit and eliminate any detected
deficiencies
X
X
Replace the Safety Sensor
X
X
LED SE (Safety Sensor, yellow) is OFF
X
X
LED OE (opening command, blue) is ON
An opening
command is pending
X
X
Check the cabling between the
opening element and the control
unit and eliminate any detected
deficiencies
X
X
Replace the Activation Sensor
Check the operating mode
The operating mode
OPEN is active
Change the operating mode
The Operating Mode
cannot be changed
Program selection keys on the side on the
side cover are not lighted
The ribbon cable
is not plugged in
correctly, or not
plugged in at all
Check the ribbon cable and
eliminate any problems
The Operating Mode symbol on the display
is underlined
The Operating Mode
is overridden via
connection
terminal X110
X
X
Change the operating mode by
means of the external Power/
Mode Switch
X
X
Correct the cabling of the
external Power/Mode Switch
Notice: If after troubleshooting a problem, and a satisfactory solution cannot be achieved, please call Nabco Entrances
at 1-877-622-2694 between 8 am – 4:30 pm Central time for additional assistance . DO NOT leave any problem
unresolved . If the door cannot be repaired immediately, turn off the door and leave it inoperable until repairs
can be made . Advise the owner NOT to operate the door in the automatic mode until repairs are effected .
NEVER leave a door operating without all safety detection systems operational .
CHAPTER 14: SOFTWARE UPDATE VIA USB
A software update of the GT20 control unit can be quickly and easily achieved with a USB flash drive.
Note: Not all USB flash drives can be used. It is recommended to test your flash drive on a test bench GT20 before using it on a
customer’s product
SECTION 14 .1: Preparation
X
The USB stick must contain a folder FD20G.
X
The file name of the application will be similiar to FD20GBL_V01_00_10.gds
X
The name of the file extension must be
gds.
•
The stick shall only contain one single FD20G folder.
•
There must be only one single file in the FD20G folder.
