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NU-TECH
SYMPTOMS POSSIBLE CAUSE SOLUTION
Door do not operate
Power do not turn on Turn on the power
Door do not operate
Door is obstructed Remove obstruction
Door is locked or motor is
stuck
Open the lock
stuck
Check the motor
Door is obstructed and
fails to upward
Operating force is too
strong
Closing force is too strong,
decrease the door closing
operation force( refer to
7.2)
Door opens automatically
when door is closing
Door deformation or rail
tracks narrow because of
extreme weather (frozen,
windy)
Closing force is too weak
, increase the door closing
operation force (refer to
7.2)
Door is obstructed Remove the obstacles
Door operates from drive
unit but not from hand-
hold transmitter
Indicator on transmitter do
not light
Battery is not well
connected
unit but not from hand-
hold transmitter
Transmitter has not
been learnt
Refer to step 8
Driver Unit antenna is not
extended
Extend the antenna
No power in battery Replace the battery
Door stops automatically Opener is overloaded
; door is obstructed and
the spring is not elastic
Stop using the door and
door open to avoid
damage
Auto close function do not
work
Photo beam sensor is
broken or the power is off
Mend photo beam sensor
and turn on power
work
Photo beam sensor is
blocked
Remove the obstruction
Door is hindered when
closing
Closing force is too weak
, increase the door closing
operation force (refer to
7.2)
Not set the auto closing
time
Refer to installation
instruction step 11
Soft stop time too long, or
too short, or no
Do not set soft stop and
soft start
See installation instruction
step 6
Malfunctions AND SOLUTIONS
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