Viking Q-4 Installation Instructions Class Ii, Class Iii, And Class Iv Heavy-Duty Commercial Vehicular Slide Ga page 36

TROUBLESHOOTING TROUBLESHOOTING
Gate does not open or close
Check all motor connections to
be fully engaged. Refer to page
15.
Check that the UL command
(photo beam and/or edge
sensor) is not active. Refer to
page 6, 7 and 23.
Ensure that you external
accessories are working
properly
Automatic close does not function
Check that the trim pot of the
hold open timer is set to the
proper time delay. Refer to
page 28.
Gate opens in the opposite desired direction
Verify your motor cable is
connected to the proper
connector. Refer to page 15
and 16.
On a Master/Slave installation, one gate runs in the opposite direction
Check the motor and limit
switch wiring. Refer to page 15
and 16.
Verify you are using shielded
cables and that the shield is
connected to the chassis ground
at both ends, the master side
and at the slave side.
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Check that limit switches are
connected to the common and
the normally close position
refer to page 16.
Check that the vehicular loop
detectors are working properly.
Refer to page 20, 21 and 23.
Note: Hold open timer closes
the gate automatically once the
gate reaches the limit open.
The time delay to close is set
by the trim pot.
To turn this system off turn the
trim pot all the way clockwise
Check that all motor cable
connections, junctions and
extensions are properly
connected and color-coded.
Refer to 15.
Verify that one unit is
connected as open-left and one
unit is connected as open-
right. Refer to page 15.
TECHNICAL SUPPORT 1 800 908 0884
Check that the stop command
is not active. Refer to page 8
and 27.
Check that the radio command
is not active. Refer to page 24.
• Make sure gate is fully open
• Check photobeam path for
obstruction
• Check photobeam power
• Check loop detectors for
proper function
Verify the interconnecting
wiring color codes match on
both the master and slave
boards. Refer to page 19.
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