Chamberlain B550 B550 B552 B750 Owner s Manual - English - Page 36

Operation TIMER-TO-CLOSE (TTC) (Factory default is set to off): The Timer-to-Close feature automatically closes the door after a specified time period and can be adjusted using the door control. DO NOT enable TTC if operating a onepiece door. TTC is to be used ONLY with sectional doors. The garage door opener will beep and the lights will flash before closing the door. The TTC feature will deactivate if the garage door encounters an obstruction twice; or the safety reversing sensors are incorrectly installed. The garage door will reverse open and WILL NOT close until the obstructions are clear or the safety reversing sensors are correctly installed. When the obstruction has been cleared or the safety reversing sensors have been aligned, the door will close when the garage door opener is activated. TTC WILL NOT work if the garage door opener is operating by battery power or if the safety reversing sensors are misaligned. This feature is NOT intended to be the primary method of closing the door. A keyless entry should be installed in the event of an accidental lock out when using this feature. To turn TTC on or off or to set the TTC time interval: Turn ON: 1. Press and hold the ON button until one of the TTC LEDs light up. 2. Then press the ON button again to cycle through the time interval options. The TTC time interval can be set to 1, 5, and 10 minutes (the corresponding TTC LED will light for each time interval). The garage door opener light bulbs will blink as confirmation. Once the TTC has been set and the door is open, the TTC LED for the selected time interval will blink and begin to count down to close the door. Turn OFF: 1. Press and hold the OFF button until all TTC LEDs turn off and a beep is heard from the garage door opener. Temporarily hold door open (suspend TTC): 1. Press and release the HOLD OPEN button. 2. Press the HOLD OPEN button again to resume normal TTC operation. 36