MM371W / MM372W Installation Instructions
27
Audible Feedback
Possible Diagnosis
Check/Solution
3 beeps , pause , 3 beeps,……
Short circuit Primary arm
h
Primary arm connections (white and green)
h
Arm power cable
h
Arm rev. counter
4 beeps , pause , 4 beeps,……
Short circuit secondary arm
h
Secondary arm connections (white and green)
h
Arm power cable
h
Arm rev. counter
5 beeps, pause, 5 beeps
Stuck limit switch primary Arm or
Reading open motor circuit
h
Arm power cable wires shorted, crossed or cut/disconnected
h
Arm rev. counter stuck switch
6 beeps, pause, 6 beeps
Stuck limit switch Secondary arm or
Reading open motor circuit
h
Arm power cable wires shorted, crossed or cut/disconnected
h
Arm rev. counter stuck switch
1 Beep, pause, 2 beeps when
attempting to activate the unit.
Reading primary motor short
condition
h
Turn the system off and back on.
h
Motor leads shorted
h
Internal arm problem/board
1 Beep, pause, 3 beeps when
attempting to activate the unit.
Reading secondary motor short
condition
h
Turn the system off and back on.
h
Motor leads shorted
h
Internal arm problem/board
The unit clicks with no arm
movement
Open motor circuit
h
Internal arm problem
Additional information can be found by contacting Nortek Security and Control.