Chamberlain K001D8395 - Error Codes for Medium Duty Operators; Medium Duty Diagnostic LED Codes

30
The status of a Medium Duty Logic Operator can be determined by counting the number of fl ashes of the LED on the
logic board.
DIAGNOSTIC LED TABLE
# OF LED FLASHES STATUS SOLUTION
1 System OK. Operating in
C2 mode
None
2 System OK. Operating in
B2 mode
None
3 Stuck CLOSE button Check for stuck close button or shorted close wire
4 LiftMaster Monitored
Entrapment Protection
Device failure
Check for: 1) Misaligned or blocked Photoelectric Sensors.
2) Issue with Monitored Sensing Edge and/or wiring.
5 Incorrect motor direction Reverse the yellow and red motor wires on the capacitor.
6 Maximum run timer has
timed out (Maximum run
time = 90 seconds)
Check clutch adjustment. Door height or speed may exceed
the range the operator can travel. Call Technical Support for
assistance.
7 Logic board Failure REPLACE logic board. NOTE: It is normal for the logic board LED
to fl ash 4 times when power is applied or cycled to the operator.
(Not a logic board failure.)
RESTRICTED CLOSE
This method will allow the door to be closed when LMEP device(s) are no longer working. Press and hold the CLOSE
button until the door reaches the closed limit. If the CLOSE button is released before the door reaches the closed limit
the operator will stop and the procedure will need to be repeated to fully close the door.
B
Medium Duty Logic Operators
Error Codes