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After the door has stopped in the fully closed
position, press the OPEN push button again. When
the door has stopped in the open position – press
the button to close the door. Complete another
door open and close cycle and confirm that when
the door has correctly calibrated the door stops
and remains stationary in the fully closed position.
After the door has calibrated, note that the
Acknowledge LED will momentarily flash (and the
optional beeper will sound) periodically whilst the
door is moving. (Pic 39 overleaf)
The door fully closed position is registered after
running the door open and closed at least twice. A
1” (25.4mm) decision height is then maintained such
that if the door strikes an obstruction higher than 1”
(25.4mm) from the ground, it will stop and reopen.
A satisfactory calibration sequence is confirmed if
the Acknowledge LED either does not flash or
flashes no more than three times after the door
has stopped in the closed position.
The Acknowledge LED may flash (and the beeper
sound) when the door stops in the fully closed
position. If it flashes (and beeps) it indicates that the
door fully closed position is higher than the original
calibrated ground position. Each flash (or beep)
represents 2
1
/2mm or 0.1”. For example two flashes
(or beeps) indicate that the door position is 5mm or
0.2” higher than the original calibrated ground
position. If it produces double flashes (and double
beeps) it indicates that the door fully closed position
is lower than the original calibrated ground position.
This may occur due to a variation in the
compressibility of the weather strip on the bottom
of the door after a significant number of door
cycles from new, changes in ambient temperature,
a build up of snow and ice or other surface
material or subsidence of the ground surface. If
the fully closed position varies significantly over a
period of time it may be preferable to complete a
new CALIBRATION RESET.
If the door is subsequently moved by hand during a
power supply failure the speed change points will be
automatically re-established following confirmation
of the ground position after a complete door cycle
in both the open and close directions.
If the door has been moved manually and is
operated in the close direction from a part open
position, it will stop and reopen from the fully
closed position. It will automatically synchronise
this calibration with reference to the ground
position during the following close cycle, which is
confirmed by periodic flashes of the Acknowledge
LED (or beeps of the beeper) during the close cycle.
In essence the door will realign to the original
ground calibration reference by simply completing a
full open and close cycle.
If the roller wheels are too tight or if there is some
damage to the door track then the door may stop
before it reaches the limit position. If track
damage or stiffness is minimal then the motor
power may be increased to overcome the
restriction by adjusting the MAXIMUM POWER
preset control slightly clockwise
. (Pic 36)
If the control is turned clockwise it will allow an
increase in current to flow to the motor and
consequently provide extra power to move the door.
The sensitivity of the door detecting and reacting
to an obstruction in fast speed in the CLOSE
13
Pic 35
Pic 36