Pic 35
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 1/2 mm 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
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)
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
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