Nortek Security & Control Mighty Mule MM372W Installation Manual page 43

Audible Feedback
3 beeps , pause , 3 beeps,......
4 beeps , pause , 4 beeps,......
5 beeps, pause, 5 beeps
6 beeps, pause, 6 beeps
1 Beep, pause, 2 beeps when
attempting to activate the unit.
1 Beep, pause, 3 beeps when
attempting to activate the unit.
The unit clicks with no arm
movement
Additional information can be found by contacting Nortek Security and Control.
Possible Diagnosis
Short circuit Primary arm
Short circuit secondary arm
Stuck limit switch primary Arm or
Reading open motor circuit
Stuck limit switch Secondary arm or
Reading open motor circuit
Reading primary motor short
condition
Reading secondary motor short
condition
Open motor circuit
Check/Solution
h Primary arm connections (white and green)
h Arm power cable
h Arm rev. counter
h Secondary arm connections (white and green)
h Arm power cable
h Arm rev. counter
h Arm power cable wires shorted, crossed or cut/disconnected
h Arm rev. counter stuck switch
h Arm power cable wires shorted, crossed or cut/disconnected
h Arm rev. counter stuck switch
h Turn the system off and back on.
h Motor leads shorted
h Internal arm problem/board
h Turn the system off and back on.
h Motor leads shorted
h Internal arm problem/board
h Internal arm problem
MM371W / MM372W Installation Instructions
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