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The supervised edge system is designed to provide status information to the installer or maintenance personnel in order to assist in 
troubleshooting. There are three indicators in the receiver unit to observe: the green “heartbeat” LED, the red “fault” LED, and an 
integral trouble sounder.

CONDITION

SOLUTION

• Red LED on
• 3 beeps repeated every 2 seconds
• Green LED does not fl ash

Transmission path failure. Make sure there is a direct line of sight 
between transmitter and receiver. Transmitter LED or receiver 
may be dirty.

OR

The battery was not properly inserted into the transmitter unit. 
Open the transmitter unit and make sure the battery is inserted 
with the correct polarity.

• Red LED on
• 3 beeps repeated every 2 seconds
• Green LED fl ashes about every second

One unit is set to channel A while the other is set to channel 
B. Open one of the units and change the channel jumper as 
described in channel election section. 

(ELECTRIC EDGE ONLY)

• Red LED on
• 3 beeps repeated every 2 seconds
• Green LED fl ashes about every second

Safety edge open fault. Open the transmitter unit and make sure 
connections are tight.

The safety edge is open or does not have an 8.2k Ohm resistor 
embedded. Use a multimeter to check the resistance on the edge, 
it should be between 7.5k Ohms and 15k Ohms.

• Red LED on
• 3 beeps repeated every 2 seconds
• Green LED fl ashes about every second

The door/grill is closed on an uneven surface. This is a normal 
condition if continuously depressed.

(ELECTRIC EDGE ONLY)

Safety edge is shorted or partially shorted. Check the edge 
connections in transmitter, and then measure the safety edge 
resistance. Correct tolerance is 7.5k Ohms to 15k Ohms. Replace 
edge if out of tolerance.

• Red LED Off
• Sounder sounds 2 beeps every ten seconds
• Green LED fl ashes about every second

Low battery indication. Replace the battery in the transmitter unit 
with a 3V Lithium battery.

IMPORTANT

 - Test system thoroughly before the door is put 

into normal operation. Stand clear of the door until it is fully 
tested. If any failure occurs during the test procedure, turn all 
power to the operator off and follow the suggestions in the 
Diagnostics section of this guide.

1. Turn power on to the operator.
2. The system should remain quiet and the green LED should  

flash briefly once a second.

3. Cover the protruding LED on the transmitter unit. The red LED 

on the receiver unit should come on and be accompanied by a 
3-beep warning from the trouble sounder every 2 seconds. 
Uncover the LED.

4. Partially open the door. Squeeze the safety edge. The red LED 

on the receiver unit should come on and be accompanied by a 
3-second continuous warning from the trouble sounder. 
Release the safety edge.

5. Begin closing the door. Being careful to stand clear of the door, 

squeeze the safety edge. The door should stop its downward 
motion and begin to open.

6.  Allow door to open completely. The system should remain quiet 

and the green LED should flash briefly once a second. Both 
units should have an unimpeded path throughout the range of 
motion of the door. Strain relief should be used on both cables 
as well as additional cable ties as necessary.

T E S T I N G

D I A G N O S T I C S

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Summary of Contents for LiftMaster 50-WSE-14

Page 1: ...iver Supervised fault occurs if normal supervisory conditions are not received Provides lock out on critical failure with electro mechanical operator and requires constant pressure to close with solid...

Page 2: ...or an AC connection The transmitter is connected to the safety edge and uses an internal 3V lithium battery for power Battery life is estimated at one year however conditions may vary For convenience...

Page 3: ...open position The receiver also may be mounted on the door s end bracket Optimal mounting position for the receiver will vary depending on the door PLACEMENT RECOMMENDATION Contact parts services for...

Page 4: ...rest transmitter 5 Slide 1 2 tubing into door astragal 6 Press 1 8 clear tubing onto barbed connector 7 Insert other end of barbed connector into hole of end plug from step 4 8 Cut 1 8 clear tubing to...

Page 5: ...run inside the sleeve around the cable Apply a thin layer of adhesive to the edge of the cable bushing to seal 1 Using scissors or a sharp razor to cut edge to length adding a total of 1 for end caps...

Page 6: ...ecuring it for storage RECEIVER UNIT TRANSMITTER UNIT C H A N N E L S E L E C T I O N S P E C I F I C AT I O N S Channel Selection Jumper Placed Ch B Removed Ch A Receiver Transmitter Electric Receive...

Page 7: ...afety edge is shorted or partially shorted Check the edge connections in transmitter and then measure the safety edge resistance Correct tolerance is 7 5k Ohms to 15k Ohms Replace edge if out of toler...

Page 8: ...2008 The Chamberlain Group Inc All Rights Reserved 01 18837D...

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