LiftMaster APT APT LOGIC 3 Manual - Page 23

AUTOMATICALLY LEARNED PROGRAMMING MAXIMUM RUN TIMER (MRT) Feature: The operator can learn the time it takes to open or close the door plus and an additional 10 seconds. Benefit: If the operator does not meet its open or close limit within the set time it will stop, limiting damage to the door and operator. To Program: NOTE: The default setting for the MRT is 90 seconds. In the event the application requires the MRT be manually learned for a longer duration follow steps below. 1. Start with the door in the closed position. 2. Set the selector dial to "PROGRAM." 3. Press MRT button on logic board. 4. Press the OPEN button and wait for the door to reach the full open limit. 5. Once the door has reached the open position, programming is complete. 6. Turn dial to desired wiring type. NOTE: To reset MRT only, turn selector dial to program and press and hold the MRT button until the MAS led flashes rapidly. SELECTOR DIAL Operation will vary depending on wiring type OPTIONAL PROGRAMMING RED/GREEN WARNING LIGHT CARD Feature: The Red/Green warning light card flashes a warning light for 10 seconds prior to the Timer to Close activating the door to close. Benefit: Advanced warning of the door closing helps prevent traffic collisions with the door. Light Control Module Operation: The green lights on the OPTION BOARD will turn on if the board is seated properly and the power is on. When the door reaches the full open limit or mid stop the timer circuit and the green lamp holder will be activated. (Green lamp will not be activated if timer setting is less than 10 seconds.) The red lamp holder will receive power as indicated at right. Requirements: Must have the Red/Green warning light kit RDGRNCARD and must have at least one of the following safety devices attached: CPS-L, CPS-LN4 or CPS3. See Red/Green warning light instructions for further details. TIMER SETTING RED LAMP HOLDER RECEIVES POWER Timer setting equals Activates when the door closes and until zero close limit is activated Greater than 10 seconds 10 seconds before door starts to close and until close limit is activated Less than or equal to Activates when the door reaches the 10 seconds open limit or mid stop The red lamp holder receives power when the door opens and remains activated if the door is stopped manually before reaching the mid stop or the open limit 23