Diagram - Chamberlain MT Installation Manual

The status of the operator can be determined by counting the number of flashes of the LED on the logic board.
# OF LED FLASHES STATUS
1 System OK. Operating in C2 mode
2 System OK. Operating in B2 mode
3 Stuck CLOSE button
4 Monitored Safety Device failure
5 Incorrect motor direction
6 Maximum run timer has timed out
(Maximum run time = 90 seconds)
7 Logic Board Failure
Brake (BMT only)
Capacitor
Motor
**
If interlock is not used,
wires are capped together.
Open
Limit
Switch
T R O U B L E S H O O T I N G
DIAGNOSTIC LED TABLE
FIX
none
none
Check for stuck close button or shorted close wire
Check for: 1) Misaligned or blocked photo eyes. 2) Issue with Monitored
Sensing Edge and/or wiring.
Reverse the yellow and red motor wires on the capacitor.
Check clutch adjustment. Door height or speed may exceed the range the
operator can travel. Call Technical Support for assistance.
Replace Logic Board. NOTE: It is normal for the logic board LED to flash 7 times
when power is applied or cycled to the operator. (Not a logic board failure.)
D I A G R A M
*
If brake is not supplied,
*
wires are capped separately
Blue
*
Blue
**
Brown
**
Brown
Orange
Purple
Yellow
Safety
Limit
Switch
Close
Limit
Switch
Grey
23
Green
Black
Black
OPEN
CLOSE
STOP
Remove Jumper to install
external door interlock.