Troubleshooting; Diagnostic Chart; Timer Defeat; Mas - Chamberlain GH Installation Manual

TROUBLESHOOTING

DIAGNOSTIC CHART

The logic board has several LEDs to assist in the installation and troubleshooting of the operator. The following chart should assist in
verifying the operator is functioning properly. Turn the selector dial to DIAGNOSTIC to keep the door from moving while
troubleshooting.
LED COLOR
Power Green
Stop Green
Open Yellow
Close Yellow

LMEP

Green

Timer Defeat

Yellow
OLS Yellow
CLS Yellow
SLS Yellow
Edge Yellow
Mid Stop Yellow
Timer Enabled Green
SBC Yellow

MAS

Yellow
Relay A Yellow
Relay B Yellow
DATA Green
Troubleshooting
DEFINITION
Indicates that power is being generated for the logic board.
Indicates a closed circuit between common and terminal 5. Pressing stop should turn off this LED.
Indicates a closed circuit between common and terminal 7. Pressing the open button should turn
ON this LED.
Indicates a closed circuit between common and terminal 6. Pressing the close button should turn
ON this LED.
Solid on indicates photoelectric sensors learned. Flashing indicates photoelectric sensors need to be
connected or obstructed. Solid off indicates no sensors learned.
Solid on indicates a closed circuit between common and terminal 12. Timer-To-Close will not close.
Pressing the Open Limit Switch should turn ON this LED.
Pressing the Close Limit Switch should turn ON this LED.
Pressing the Sensing Limit Switch should turn ON this LED.
Indicates a closed circuit between common and terminal 8. Pressing the edge should turn ON this LED.
Solid on indicates door is stopped on up or down mid stop. Flashing indicates MID STOP is being set.
Solid on indicates TIMER is programmed and will activate from open or mid stop position. Flashing
indicates Timer is counting down and door will close after preset time.
Indicates a closed circuit between common and terminal 1. Pressing the single button control station
should turn ON this LED.
Indicates the Maintenance Alert System has been activated or an error code has been triggered.
Indicates open or close command has been given to the motor. LED turns on when OPEN/CLOSE button is
pressed.
Indicates open or close command has been given to the motor. LED turns on when OPEN/CLOSE button is
pressed.
Indicates communication between the Logic 4 board and optional TLSCARD.
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