[18] Merlin MR800 / MR600 - How to Set Travel Limits

Setting the Limits
Up limits regulate the points at which the door will stop when moving up or down. Follow the steps below to set the limits.

• Check that the opener is engaged and midway between open and closed.

For left hand side installations the black wire jumper loop on the terminal block should be removed.

To program the travel limits:
• Press and hold the BLACK button until the orange indicator light starts flashing slowly and then release. Opener lights will dim. Press the BLACK button to move the door UP or the PURPLE down button to move the door DOWN until the door reaches the desired UP limit.
Check to be sure the door is high enough for your vehicle. Adjust if necessary.

• Press the GREEN start button
This sets the full UP limit.
The door will travel to the floor and reverse back to the UP limit. The opener has learned its limits.

• The indicator light will stop flashing when the limits have been learned.

NOTE: If the door presses excessively on the floor or reverses before it reaches the floor use the Manual Limit setting option:

Manual Limit setting

With the door in the midway position.
• Press and hold the black button until the orange
LED starts flashing.
• Use the black (up) and purple (down) button to set
the door opening limit
• Press the Green activation button to start the door,
once it starts travelling down, press either the black
or purple button to engage manual limit setting.
• Use the purple and black buttons to set the closing
limit.
• Test door three or four times to check limit settings.

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[frank]

Hi, I have this same MR800a on a single roller door that I've mainly been using in manual mode. Locking and unlocking by using the pull cord. When I lock(pulling cord) when the door is in closed it doesn't actually lock but allows the door to manually lift by about 150mm then it locks. Is there a part that you think will need changing or a way to fix or is it a replace job.