Garage Doors – Repair Guide

The tables below contain the troubleshooting steps to use when your gate opener won’t work as directed or when you notice any other unusual symptom. Remember to try these solutions before you call a technician – chances are you will have the device working in just a quarter of an hour without someone’s help.

Chamberlain CSW200UL gate opener troubleshooting

Condition	Probable Causes	Solution
Overload LED ON and Power LED OFF	1. Short circuit at terminals 11 and 13.	1. Remove the short circuit condition at the terminals.
	2. Short circuit at any of the loop detectors in the board.	2. Remove the defective loop detector.
	3. Short circuit in the control board.	3. Send the board to repair.
Overload LED ON and Power LED ON	1. Excessive current draw at terminal 13.	1. Reduce the accessories load from surge suppressor terminal 13.
	2. Over-voltage at the 110 Vac line input.	2. Verify your electrical power.
System On LED Flashing	1. Motor thermal fuse has popped-out (Rapid Flashing). OR	1. Reset the motor. OR
	2. One limit switch is faulty (Rapid Hashing).	2. Test the limit switches and wire connections, fix the fault.
Reverse Sensor LED ON	1. Gate has encountered an obstruction during traveling.	1. Remove the obstruction.
	2. Reverse sensor is extra sensitive.	2. Turn the reverse sensor switch counter-clockwise a little more and try again.
Alarm Sensor LED ON	1. Gate encountered an obstruction during traveling.	1. Remove the obstruction.
	2. Alarm sensor is extra sensitive.	2. Turn the alarm sensor switch counter clockwise a little more and try again.
Command Processed LED ON	1. There is a command hold active.	1. This is a normal response of the gate operator. It does not represent necessarily that there is a problem.
Timer LED Blinking and Command Processed LED Blinking	1. There is a command holding the gate open.	1. This is a normal response of the gate operator. It does not represent necessarily that there is a problem. Check inputs for command.
Timer LED Blinking, Command Processed LED Blinking and Reverse Sensor LED ON	1. Gate has reopened because it encountered an obstruction while closing.	1. Any re-new command will resume normal operation. Check for obstructions.
Audio Alarm ON	1. Gate has encountered two consecutive obstructions while trying to close or open.	1. Any re-new command will resume normal operation but not a radio command. Check for obstructions. 2. You can stop the alarm by using the built-in reset button. 3. You can stop the alarm by using an optional stop button.
Any Loop LED ON and No vehicle on the sensing area	1. The loop detector needs to be reset.	1. Reset the loop detector (If you use Elite® Plug-in Loop detectors, change the setting for sensitivity and come back to your original setting.)
	2. The wire loop has been disrupted.	2. Verify and correct connections.
	3. The loop detector needs to work in a different frequency.	3. Set a different working frequency.
	4. The loop detector is too sensitive.	4. Decrease the sensitivity of the loop detector.

Chamberlain GS400D gate opener troubleshooting

ERROR CODE	PROBLEM	POSSIBLE SOLUTION
1 Blink	Power ON	Normal Operation
2 Blinks	STOP not connected	STOP is a normally closed input. Press the RESET button and make sure the STOP LED turns on. Check to make sure the jumper wire is connected between the COM and STOP input on the control board.
3 Blinks	Low Battery Voltage	Battery voltage is below the recommended operating voltage. • Inadequate charging. Disconnect all batteries and verify AC power or solar input can power board. • Verify that the battery fuses are intact and not blown. Replace blown fuses with same type and rating. • Batteries are old. Replace old batteries with 922GA battery replacement kit.
4 Blinks	Low Battery Capacity	Batteries do not have enough capacity to operate gate. • Inadequate charging. Disconnect all batteries and verify AC power or solar input can power board. • Verify that the battery fuses are intact and not blown. Replace blown fuses with same type and rating. • Batteries are old. Replace old batteries with 922GA battery replacement kit.
5 Blinks	RPM Reversal Gate 1	• Gate 1 hit an obstruction. Make sure the gate travel is clear and the gate moves freely. • Bad connection to Gate 1 arm. Check the green and white wires on the motor arm to make sure they are secure in the connector. • Bad arm or control board. Enter the Learn Limits mode and attempt to move the arm on Gate 1. If the arm does not move continuously, move it to the Gate 2 connector and repeat the attempt to move the arms. If the arm does not move continuously on either Gate 1 or 2, the arm is faulty.
6 Blinks	Force Reversal Gate 1
7 Blinks	RPM Reversal Gate 2
8 Blinks	Force Reversal Gate 2	• Gate 1 hit an obstruction. Make sure the gate travel is clear and that the gate moves freely. • Force Dial is set too low. Increase the Force Dial setting to verify that the gate moves without reversing and that it can still reverse off an obstruction.
9 Blinks	Flash Check Failed	• Cycle power. If problem persists, call technical support. • If problem does not resolve itself by cycling power, a new board may be needed.
10 Blinks	EEPROM Check Failed
11 Blinks	RAM Check Failed
12 Blinks	Watchdog	• Cycle power. If problem persists, call technical support.
	Reset	• If problem does not resolve itself by cycling power, a new board may be needed.
13 Blinks	Gate 1 Out of Sync	• Verify Gate 1 arm and associated mounting hardware is secure. Replace any bolts or other hardware that have excessive wear or play.
		• Verify Gate 1 is balanced by disconnecting the arm and ensuring it swings in both directions with equal effort. • Relearn limits. If problem persists, call technical support.
14 Blinks	Gate 2 Out of Sync	• Verify Gate 2 arm and associated mounting hardware is secure. Replace any bolts or other hardware that have excessive wear or play. • Verify Gate 2 is balanced by disconnecting the arm and ensuring it swings in both directions with equal effort. • Relearn limits. If problem persists, call technical support.

SYMPTOM	POSSIBLE SOLUTION
Operator does not run. Diagnostic LED not on.	• Power not connected. Make sure the AC/Solar input is connected and that at least one battery is connected with the corresponding fuse intact.
	• Low or defective battery. Check the battery to make sure that the red wire goes to the positive terminal of the battery and the black wire goes to the negative terminal of the battery. Replace the battery if the open circuit voltage is below 11.5Vdc.
	• Bad control board. Call technical support for more options.
Operator powers up but does not run.	• Low or defective battery. At least one charged battery must be connected for the unit to operate. Verify the battery fuse is intact. Check battery connections and battery voltage to be above 11.5V Replace batteries if necessary.
	• STOP button connection loose or disconnected. Press the RESET button and verify that the STOP LED lights up and then turns off after 10 seconds. Verify the wire connects between the STOP and CTRL PWR terminals.
	• Obstruction blocking safety sensors. Press the RESET button and verify that all the safety LEDs (OPEN EDGE/PHOTO, OPEN PHOTO, CLOSE PHOTO) are OFF. If any are ON, clear any obstructions and verify the LED turns off
	NOTE: The RESET button may need to be hit multiple times since the LEDs turn off after 10 seconds when the unit goes to sleep.
	• (Optional Accessory) Safety edge is damaged or on an obstruction. Press the RESET button and verify that the Safety LEDs (OPEN EDGE and CLOSE EDGE/PHOTO) are OFF. If either is ON, clear any obstructions and verify the LED turns off.
	NOTE: The RESET button may need to be hit multiple times since the LEDs turn off after 10 seconds when the unit goes to sleep.
	• (Optional Accessory) Interrupt loop or Shadow loop is obstructed. Press the RESET button and verify that the INTERRUPT and SHADOW LEDs are OFF. If either is on, check the loop detector and its wiring to insure that it is not incorrectly being triggered.
Relays “click" when remote control or single button control (SBC) command is given, but the operator does not move.	• Bad control board. Call technical support for help with replacement parts.
	• Battery not connected. At least one charged battery must be connected for the unit to operate. Verify battery fuse is intact. Check battery connections and battery voltage to be above 11.5V. Replace batteries if necessary.
	• Arm cable loose or disconnected. Verify that all of the wires, especially the red and blue wires, going to the arm are secure and that the connector is properly mated to the header.
	• Arm is jammed or incorrectly installed. Disconnect the motor housing from the arm and verify that the arm moves freely. With the motor housing still disconnected, enter the Learn Limits mode and verify that the motor spins. Reconnect the motor housing to the arm and make sure that all 4 screws are securely tightened and that the motor seats correctly against the worm drive. Relearn limits for the operator.
	• Bad control board. Call technical support for help with replacement parts.
The arm moves but cannot exit Leam Limits mode. Cannot leam limits.	• Arm does not extend or contract enough during travel. The arm piston must extend and contract close to its full length to Learn Limits. Adjust the arm mounting so that this can be achieved.
	• Motor cable wire not connected. Make sure that all the motor wires are connected properly.
	• Motor housing is not properly seated. Make sure that the motor housing for the arm(s) is properly seated so there are no gaps between the motor housing and arm assembly. Make sure all 4 screws are tightened.
Gate does not fully open or close when trying to leam limits.	• Over extending or contracting arm. Disconnect the motor housing from the arm and make sure that the arm moves freely throughout the full length of travel. Adjust arm mounting and positioning if necessary.
	• Arm is interfering with the gate mount bracket. Examine the hinge point where the arm mounts to the gate post. Make sure that the arm housing does not hit or interfere with the gate post or mounting bracket throughout the full length of travel. Adjust the arm mounting and positioning if necessary.
	• Gate is excessively heavy or hinges are bad. Verify that the gate is within the ratings for this product. Disconnect the arms and verify that both gates swing easily. Lubricate or replace hinges as necessary.
Unit does not respond to single button control (SBC) command.	• Battery not connected. At least one charged battery must be connected for the unit to operate. Verify the battery fuse is intact. Check battery connections and battery voltage to be above 11.5V. Replace batteries if necessary.
	• STOP button connection loose or disconnected. Press the RESET button and verify that the STOP LED lights up and then turns off after 10 seconds. Verify the wire connects between STOP and CTRL PWR terminals.
	• Single Button Control (SBC) button connection loose. Check wiring for SBC button. Use the on-board single button to verify operator will respond.
	• Bad control board. Call technical support for help with replacement parts.
Unit does not respond to remote control command.	• Battery not connected. At least one charged battery must be connected for the unit to operate. Verify battery fuse is intact. Check battery connections and battery voltage to be above 11.5V. Replace batteries if necessary.
	• STOP button connection loose or disconnected. Press the RESET button and verify that the STOP LED lights up and then turns off after 10 seconds. Verify the wire connects between the STOP and CTRL PWR terminals.
	• Radio module not plugged in. Verify the green Radio module (located next to the coaxial connector) is properly mated with both 4-pin connectors.
	• Antenna not connected. Verify the antenna and coaxial cable are properly connected to the control board.
	• Transmitter not learned.
	• Bad control board. Call technical support for help with replacement parts.
Gate stops and reverses immediately after it starts moving.	• Obstruction sensed. Check safety devices and gate for obstructions.
	• A fault has occurred. Check Diagnostic LED for possible error codes.
	• Force set too low. Adjust FORCE setting until gate completes a full open/close cycle without reversing. The force setting may need to be adjusted in cold weather, as the gate will not move freely.
	• Loops are reversed. Make sure that the Safety loop and Shadow loop are connected properly. The gate may trigger the Shadow loop as it moves, so it must be connected to the correct input.
	• Low or defective battery. At least one charged battery must be connected for the units to operate. Verify battery fuse is intact. Check battery connections and battery voltage to be above 11.5V. Replace batteries if necessary.
Gate opens but does not close.	• An open input is continuously activated. Check the open loop or vehicle probe to make sure they are clear of objects. Verify connections and operation for these devices.
	• Low battery. Measure the voltage across the battery. Voltage should be above 11.5Vdc. Replace battery if required.
	• (Optional Accessory) Entry system output is connected to the OPEN input, and is “stuck" opening. Verify entry system connections and operations.
	• Obstruction blocking close photo eyes, shadow loop, or safety loop. Check eyes for alignment and verify all connections and operation for safety devices.
	• (Optional Accessory) Close safety edge is damaged or on an obstruction. Verify operation and connection of close edge.
Gate does not close automatically with Timer to Close enabled.	• Verify that the Timer to Close is ON and adjusted to desired delay.
	• Gate opened by a force obstruction reversal. Check the Diagnostic LED and clear gate path of any obstructions.
	• The Interrupt loop or Shadow loop is obstructed (optional accessories).
	• Obstructed close safety sensor or safety edge (optional accessory). Check connections and operations of safety devices.
	• Low battery. Measure the voltage across the battery. Voltage should be above 11.5Vdc. Replace battery is required.
	• An open input is continuously activated. Check the open loop or vehicle probe to make sure they are clear of objects. Verify connections and operation for these devices.
	• (Optional Accessory) Entry system output is connected to the OPEN input, and is “stuck" opening. Verify entry system connections and operation.
	• Operator in “Party" mode after RESET button pressed while at the OPEN limit. Use a remote or the SBC to close the gate and reopen it. Verify that the TIMER RUNNING LED is flashing.
Alarm constantly sounds for 5 minutes. Sounds whenever a command is issued.	• Double entrapment occurred. Two successive obstructions were encountered while moving the gate. Press the RESET button and ensure that the gate path is clear of all obstructions. Check the FORCE setting to make sure it is properly set.
Alarm is beeping 3 times on a command.	• Low battery. Measure the voltage across the battery. Voltage should be above 11.5Vdc. Replace battery if required.
Gate runs too slow.	• Open and Close Limits are set too close together. If the Open and Close Limits are set within the ramp down distance of each other, the gate will run at slow speed all the time.
	• The gate is starting within the ramp down distance from the Open or Close Limit. Gate will run slow to limits if motion is started within the ramp-down distance from the limit.
Gate 2 closes before Gate 1.	• Lock/Bipart Delay not set. Slide the Lock/Bipart Delay switch to ON. Verify that Gate 1 starts moving first on open and last on close.
	• Gate is excessively heavy or hinges are bad. Verify that the gate is within the ratings for this product. Disconnect the arms and verify that both gates swing easily. Lubricate or replace hinges as necessary.
	• Gate is unbalanced. Disconnect the arms and verify that both gates swing easily in both directions. If the gates are harder to move in one direction verses the other, the gate is not properly balanced and the hinges must be adjusted.
	• Bad motor connection. Check the motor wires and connections for possible loose or corroded terminals.
Alarm beeps when running.	• Low battery. Measure the voltage across the batte 11.5Vdc. Replace battery if required.

Chamberlain LiftMaster SL930 gate opener troubleshooting

Problem	Cause/Solutions
REMOTE CONTROL DOES NOT WORK	1. Check the battery inside of the remote control and/or try another remote control. 2. Check to see which LEDs are illuminated on the circuit board. For normal operating conditions the only LEDs that should be illuminated are the stop input at terminal 9 and Limit Switch 1 input if the gate is in the fully open position or Limit Switch 2 input if the gate is in the fully closed position. 3. If any of the input LEDs are illuminated on terminals 4, 5, 7 or 10, disconnect wires from that input terminal that is illuminated until the LED is extinguished to determine which input device may be stuck in an on condition. 4. If it is the radio receiver that appears to be stuck in an on condition, check all remote controls to see if any of them are stuck on. 5. Make sure that there is power (10 to 16 VDC) to the receiver on terminals 8 and 12 and make sure that the circuit breaker button is pressed in. 6. If a click is heard while the remote control is being pressed and there is no response from the operator, check all receiver connections. 7. If there is still no response, see malfunction GATE WILL NOT OPEN OR CLOSE.
GATE TRAVELS TOO FAR OR NOT FAR ENOUGH	1. Adjust the gate sensitivity. If the gate sensitivity adjustment is too sensitive, the gate may stop in mid-travel. 2. It may be necessary to lubricate any mechanical parts on the gate including wheels and rollers and clean the track of any debris. 3. Check the limit switch input LEDs on terminals 1 and 3 to see if either one is illuminated. If one of the limit switch input LEDs is illuminated and the gate has traveled too far or not far enough, this indicates that the limits of travel may need adjustment. Adjust the limits of travel. This adjustment may change slightly as the chain stretches due to normal wear and it may change dramatically if the chain has been retightened or the limit plate is accidentally left not engaged with the limit nuts. 4. If the limit nut has traveled past a limit switch, check the limit switch and all limit switch connections. 5. Watch the stop input LED on terminal 9 while the gate operator is running and see if the LED flickers or extinguishes. This may indicate a faulty stop input device or a poor connection between the stop input terminal 9 and common. 6. If the stop input LED on terminal 9 flickers or extinguishes check all connections to the stop input device and/or replace faulty device.
GATE BEGINS TO OPEN OR CLOSE, THEN STOPS OR REVERSES	1. Adjust the gate sensitivity. If the gate sensitivity adjustment is too sensitive, the gate may stop in mid-travel or reverse. 2. It may be necessary to lubricate any mechanical parts on the gate including wheels and rollers and clean the track of any debris. 3. Watch the input LEDs on terminals 4, 5, 7 and 10 while the gate operator is running to see if any of the LEDs flicker or illuminate. 4. If there is an input LED that flickers or illuminates while the gate is running, disconnect the wires one at a time from that input terminal until the LED does not flicker or illuminate to determine which input device may be activating. 5. If it is the radio receiver that appears to be stuck in the on condition, check all remote controls to see if any of them may be stuck on. A stuck transmitter may cause the gate operator to reverse.
GATE WILL NOT OPEN OR CLOSE	Test the operator to find out whether the open input devices are functioning by following these steps: 1. If a remote control is being used to open the gate, try another remote control or try using a push button if there is one installed. 2. If a push button is being used try using another push button or a remote control. 3. If there is no push button installed the gate may be operated by connecting a jumper wire to terminal 8 and momentarily touching it to terminal 5 or 7. 4. If the remotes are not working, see malfunction REMOTE CONTROL DOES NOT WORK. 5. Check the manual release switch to make sure it is in the operate (up) position. 6. Check to see which LEDs are illuminated on the circuit board. For normal operating conditions the only LEDs that should be illuminated are the stop input at terminal 9 and Limit Switch 1 input if the gate is in the fully open position or Limit Switch 2 input if the gate is in the fully closed position. 7. If any of the input LEDs are illuminated on terminals 4, 5, 7 or 10, disconnect wires from that input terminal that is illuminated until the LED is extinguished to determine which input device may be stuck. 8. If the stop input LED on terminal 9 is not illuminated, check the stop input device if any are installed and all connections to the device. If no stop input device is installed make sure that there is a jumper between terminals 8 and 9 and that it is securely fastened. 9. Check the circuit breaker button. If the circuit breaker is tripped, press it back in. 10. Make sure there is power to the circuit board on terminals 13 and 14.
THE GATE WILL NOT STOP OR REVERSE WHEN IT MEETS AN OBSTRUCTION	Adjust the gate sensitivity. The operator needs to be adjusted for more sensitivity. This is done by turning the open and close gate sensitivity adjustments clockwise for more sensitivity.
GATE WILL NOT STAY CLOSED	1. Make sure that the Right/Left Side operation switch is in the correct position. If the Right/Left Side operation switch is in the incorrect position, the auto close timer feature may be working in reverse and telling the gate operator to open after the auto close time has elapsed. 2. Check to see if any input LEDs on terminals 4, 5 or 7 flicker or illuminate when the gate gets to the closed position. 3. If any of the input LEDs flicker or illuminate on terminals 4, 5, or 7, disconnect wires from that input terminal that is illuminated until the LED is extinguished to determine which input device may be activating.
TIMER WILL NOT CLOSE THE GATE	1. Make sure that the Right/Left Side operation switch is in the correct position. If the Right/Left Side operation switch is in the incorrect position, the auto close timer feature may be working in reverse and telling the gate operator to open instead of close after the auto close time has elapsed. 2. Make sure the auto close timer switch is in the ON position. The auto close timer switch is located on the right edge of the circuit board. 3. Adjust the amount of auto close time. The auto close time may be set too high and is simply taking a long time to close. Do not continue pressing the remote control or other open or safety input devices because each time an open or a safety input is given the timer will reset and begin counting over.
OPERATOR RUNS IN ONLY ONE DIRECTION	1. Check to see which LEDs are illuminated on the circuit board. For normal operating conditions the only LEDs that should be illuminated are the stop input at terminal 9 and Limit Switch 1 input if the gate is in the fully open position or Limit Switch 2 input if the gate is in the fully closed position. 2. If any of the input LEDs are illuminated on terminals 4, 5, 7 or 10, disconnect wires from that input terminal that is illuminated until the LED is extinguished to determine which input device may be stuck.

Chamberlain SL600 gate opener troubleshooting

Trouble	Cause	Solution
The operator will not work from the remote control.	1. The plug is not securely connected.	1. Have the power supply connected securely by a qualified technician.
	2. The clutch is disengaged.	2. Engage the clutch with the release key.
	3. Photoelectric sensor or edge sensor malfunction.	3. Check the photoelectric sensors and edge sensors. If the photoelectric sensors or edge sensors are damaged, replace with a new pair. If no sensors are installed, connect the GND terminal and IR terminal with a short cable.
	4. The fuse is blown.	4. Replace the fuse.
	5. The remote control code has been erased.	5. Reprogram the remote control.
	6. The remote control battery power is too weak or dead.	6. Replace the remote control battery.
When opening or closing the gate, the gate does not stop when the block touches the limit switch.	1. The SW1 and SW2 terminal connections are reversed.	1. Switch the SW1 and SW2 terminal connections.
	2. The motor wire connections are reversed.	2. Switch the motor wire connections.
The gate does not reverse when meeting obstacles.	1. The gate closing direction has been set incorrectly.	1. Set dip switch 5 to the opposite position.
	2. The force is set too high.	2.Turn the force setting dial counterclockwise to adjust the force to a proper level.
The gate opens automatically during the closing procedure.	The force is set too low.	Turn the force setting dial clockwise to adjust the force to a proper level.
The gate opens automatically when the door is completely closed.	The gate closing direction has been reversed and the automatic closing gate function is active.	Set dip switch 5 to the opposite position.
The gate does not open completely.	The user controls the gate by partial open button in error.	Control the gate by pressing full opening/closing button.

Chamberlain SL585103U gate opener troubleshooting

Code	Meaning	Solution
31	Main control board has experienced an internal failure.	Disconnect all power, wait 15 seconds, then reconnect power (reboot). If issue continues, replace main control board.
35	Max-Run-Time Exceeded Error	Attempt to run and review for duration and obstructions. Max-Run- Time can be re-measured by saving one or both of the limits again.
36	Product ID Error	Was the control board just replaced? If so, erase limits, enter limit setup mode and set limits. If not, disconnect all power, wait 15 seconds, then reconnect power before changing product ID harness.
37	Product ID Failure	Unplug product ID harness then plug back in. Disconnect all power, wait 15 seconds, then reconnect power before replacing product ID harness.
43	Loop Error - Failure or missing exit loop (SHORT or OPEN - LiftMaster Plug-in Loop Detector only)	Check loop wiring throughout connection. May be a short in the loop, or an open connection in the loop.
44	Loop Error - Failure or missing shadow loop (SHORT or OPEN - LiftMaster Plug-in Loop Detector only)
45	Loop Error - Failure or missing interrupt loop (SHORT or OPEN - LiftMaster Plug-in Loop Detector only)
46	Wireless edge battery low	Replace batteries in wireless edge.
47	Power board fault	Relay fault detected in the power board. Replace the power board.
50	Run-Distance Error	The limits are less than the minimum requirement or longer than what was learned. Check limit positions and proper switch function. Run-distance can be re-learned by setting the handing again.
53	Brownout occurred	AC/DC board supply dipped below allowable level. Review power supply and wiring. If rebooting, ensure enough time for discharge of power to force a fresh boot.
54	Wireless Second Operator Communication Error	Check the second operator for power. If OFF, restore power and try to run the system. If powered, deactivate the wireless feature and then re-learn the second operator.
55	System AC Overvoltage	Call utility.
56	System AC Undervoltage	Check wiring and wire gauge to operator.
57	Limit Error - Stuck Switch	Check switch for proper operation. Check harness for shorts. Replace if defective.
58	Limit Error - Wrong Switch	Check motor wiring.
59	Missing Power Board	Check harness for shorts. Check for presence of power board.
60	Minimum number of monitored entrapment protection devices (one) not installed.	Review monitored entrapment protection device connections.
60
61	CLOSE EYE/INTERRUPT held more than 3 minutes (main board)	Check CLOSE EYE/INTERRUPT input on main board; check for alignment or obstruction. The photoelectric sensors may be installed too far apart.
62	CLOSE EDGE held more than 3 minutes (main board)	Check CLOSE EDGE input on main board; check for alignment or obstruction.
63	OPEN EYE/EDGE held more than 3 minutes (main board)	Check OPEN EYE/EDGE input on main board; check for alignment or obstruction. The photoelectric sensors may be installed too far apart.
64	CLOSE EYE/INTERRUPT held more than 3 minutes (expansion board)	Check wired input on expansion board; check for alignment or obstruction. The photoelectric sensors may be installed too far apart.
65	CLOSE EYE/EDGE held more than 3 minutes (expansion board)
66
67	Wireless edge triggered more than 3 minutes	Check wired input for wiring issue or obstruction.
68	Wireless edge loss of monitoring	Check wireless edge inputs.
69	Wireless edge triggered	IF an obstruction occurred, no action required. If an obstruction did NOT occur, check inputs and wiring.
70	CLOSE EYE/INTERRUPT triggered, causing reversal, preventing close, or resetting TTC (main board)	IF an obstruction occurred, no action required. If an obstruction did NOT occur, check alignment, inputs, and wiring.
71	CLOSE EDGE triggered, causing reversal, preventing close, or canceling TTC (main board)
72	OPEN EYE/EDGE triggered, causing reversal or preventing opening (main board)
73	CLOSE EYE/INTERRUPT triggered, causing reversal, preventing close, or resetting TTC (expansion board)
74	CLOSE EYE/EDGE triggered, causing reversal and preventing close or canceling TTC (expansion board)
75	OPEN EYE/EDGE triggered, causing reversal or preventing opening (expansion board)
80	Close input (EYE/EDGE) communication fault from other operator	Check inputs and communication method between operators, either wired bus or radio. Ensure operator is powered. May have to erase the wireless communication and reprogram the two operators.
81
82	Close input (EYE/EDGE) communication fault (expansion board)	Check the connections between the main board and the expansion board.
83
91	Force Reversal	Look for obstruction, if no obstruction, check that the mechanical assembly is engaged and free to move.
93	RPM / STALL Reversal	Check for obstruction. If no obstruction, check the encoder wiring and that the operator is engaged and free to move. Replace RPM assembly.
95	AC motor no start condition	Motor start sequence failed. If the gate and motor are NOT moving, or moving too slow, check for an obstructed gate, binding in the mechanism, and relay board and start capacitor connections. If the gate and motor ARE moving, failure is due to loss of the encoder signal. Check the encoder cup and sensor on the limit shaft, and wiring.
96	Current Sensor Fault	A fault was detected on the current sensor. Make sure the current sensor is connected to the main control board. Check the current sensor harness for an open or short. The operator will need a power cycle to resume operation after correcting the fault. If the fault continues, replace the power board.
99	Normal Operation	No action required

SYMPTOM	POSSIBLE CAUSES	SOLUTIONS
Operator does not run and	a) No power to control board	a) Check AC power
diagnostics display not on.	b) Open fuse	b) Check fuses
	c) Defective control board	c) Replace defective control board
Control board powers up, but motor does not run.	a) Reset switch is stuck	a) Check reset switch
	b) Stop button active or jumper not in place for stop circuit	b) Check Stop button is not “stuck on", or verify that the stop button is a normally closed circuit, or put a jumper on the stop circuit.
	c) Open or Close input active	c) Check all Open and Close inputs for a “stuck on” input
	d) Entrapment Protection Device active	d) Check all Entrapment Protection Device inputs for a “stuck on" sensor
	e) Vehicle loop detector or probe active	e) Check all vehicle detector inputs for a “stuck on” detector
	f) Defective control board	f) Replace defective control board
Gate moves, but cannot set correct limits.	a) Gate does not move to a limit position	a) Use manual disconnect, manually move gate, and ensure gate moves easily limit to limit. Repair gate as needed.
	b) Gate is too difficult to move	b) Gate must move easily and freely through its entire range, limit to limit. Repair gate as needed.
	c) Limits are set too close (slide gate applications only)	c) Ensure the gate moves at least four feet between the OPEN limit and the CLOSE limit.
Gate does not fully open or fully close when setting limits.	a) Gate does not move to a limit position	a) Use manual disconnect, manually move gate, and ensure gate moves easily limit to limit. Repair gate as needed.
	b) Gate is too difficult to move	b) Gate must move easily and freely through its entire range, limit to limit. Repair gate as needed.
Operator does not respond to a wired control/command (example: Open, Close, SBC, etc.)	a) Check Open and Close command input LEDs	a) Check all Open and Close inputs for a “stuck on” input
	b) Stop button is active	b) Check Stop button is not “stuck on"
	c) Reset button is stuck	c) Check Reset button
	d) Entrapment Protection Device active	d) Check all Entrapment Protection Device inputs for a “stuck on” sensor
	e) Vehicle loop detector or vehicle probe active	e) Check all vehicle detector inputs for a “stuck on” detector
Operator does not respond to a wireless control or transmitter	a) Check XMITTER LED when wireless control is active	a) Activate wireless control and check XMITTER LED is on. Re-learn wireless control/transmitter to control board. Replace wireless control as needed.
	b) Stop button is active	b) Check Stop button is not “stuck on"
	c) Reset button is stuck	c) Check Reset button
	d) Poor radio reception	d) Check if similar wired control operates correctly. Check if wireless controls works properly when within a few feet of operator. Check operator’s antenna and antenna wire. Check other wireless controls or devices.
Gate stops during travel and reverses immediately.	a) Control (Open, Close) becoming active	a) Check all Open and Close inputs for an active input
	b) Vehicle loop detector active	b) Check all vehicle detector inputs for an active detector
Gate opens, but will not close with transmitter or Timer-to-Close.	a) Open control active	a) Check all Open inputs for an active input
	b) Vehicle loop detector active	b) Check all vehicle detector inputs for an active detector
	c) Fire Dept input active	c) Check Fire Dept input
	d) Timer-to-Close not set	d) Check Timer-to-Close (TTC) setting
	e) Close Entrapment Protection Device active	e) Check all Entrapment Protection Device inputs for an active sensor
Gate closes, but will not open.	a) Vehicle loop detector active	a) Check all vehicle detector inputs for an active detector
Exit loop activation does not cause gate to open.	a) Exit vehicle detector setup incorrectly	a) Review Exit loop detector settings. Adjust settings as needed.
	b) Defective Exit loop detector	b) Replace defective Exit loop detector.
Interrupt loop does not cause gate to stop and reverse.	a) Vehicle detector setup incorrectly	a) Review Interrupt loop detector settings. Adjust settings as needed.
	b) Defective vehicle loop detector	b) Replace defective Interrupt loop detector.
Shadow loop does not keep gate at open limit.	a) Vehicle detector setup incorrectly	a) Review Shadow loop detector settings. Adjust settings as needed.
	b) Defective vehicle loop detector	b) Replace defective Shadow loop detector.
Obstruction in gate's path does not cause gate to stop and reverse	a) Force adjustment needed	a) Perform the proper force adjustment that is needed.
Photoelectric sensor does not stop or reverse gate.	a) Incorrect photoelectric sensor wiring	a) Check photoelectric sensor wiring. Retest that obstructing photoelectric sensor causes moving gate to stop, and may reverse direction.
	b) Defective photoelectric sensor	b) Replace defective photoelectric sensor. Retest that obstructing photoelectric sensor causes moving gate to stop, and may reverse direction.
	c) Photoelectric sensors installed too far apart	c) Move the photoelectric sensors closer together or use edge sensors instead.
Edge Sensor does not stop or reverse gate.	a) Incorrect edge sensor wiring	a) Check edge sensor wiring. Retest that activating edge sensor causes moving gate to stop and reverse direction.
	b) Defective edge sensor	b) Replace defective edge sensor. Retest that activating edge sensor causes moving gate to stop and reverse direction.
Alarm sounds for 5 minutes or alarm sounds with a command.	a) Double entrapment occurred (two obstructions within a single activation)	a) Check for cause of entrapment (obstruction) detection and correct. Press the reset button to shut off alarm and reset the operator.
On dual-gate system, incorrect gate opens first or closes first.	a) Incorrect Bipart switch setting	a) Change setting of both operator’s Bipart switch settings. One operator should have Bipart switch ON (operator that opens second) and the other operator should have Bipart switch OFF (operator that opens first)
Alarm beeps when running.	a) Expansion board setting	a) Pre-warning is set to ’ON'
	b) Constant pressure to open or close is given	b) Constant pressure to open or closed is given
Expansion board function not controlling gate.	a) Defective main board to expansion board wiring	a) Check main board to expansion board wiring. If required, replace wire cable.
	b) Incorrect input wiring to expansion board	b) Check wiring to all inputs on expansion board.
	c) Defective expansion board or defective main board	c) Replace defective expansion board or defective main board
Maglock not working correctly.	a) Maglock wired incorrectly	a) Check that Maglock is wired to N.C. and COM terminals. Check that Maglock has power (do not power maglock from control board accessory power terminals). If shorting lock’s NO and COM wires does not activate Maglock, then replace Maglock or Maglock wiring.
Solenoid lock not working correctly.	a) Solenoid wired incorrectly	a) Check that Solenoid is wired to N.O. and COM terminals. Check that Solenoid has power (do not power solenoid from control board accessory power terminals). If shorting lock’s NC and COM wires does not activate Solenoid, then replace Solenoid lock or Solenoid wiring.
Quick Close not working correctly.	a) Quick Close setting incorrect	a) Check that Quick Close setting is ON
	b) Interrupt loop detector	b) Check operation of Interrupt Loop detector
	c) Defective Expansion board	c) Replace defective Expansion board
Anti-Tailgating not working correctly.	a) Anti-Tail setting incorrect	a) Check that Anti-Tail setting is ON
	b) Interrupt loop detector	b) Check operation of Interrupt Loop detector
	c) Defective Expansion board	c) Replace defective Expansion board
AUX Relay not working correctly.	a) AUX Relay setting incorrect	a) Check AUX Relay switches settings
	b) AUX Relay wiring incorrect	b) Check that wiring is connected to either N.O. and COM or to N.C. and COM.
	c) Defective Expansion board	c) Set AUX Relay to another setting and test. Replace defective expansion board.

Chamberlain Swing GATE gate opener troubleshooting

Problem	Cause/Solutions
1. OPERATOR IS DEAD	When the unit power switch is cycled, no LED turns on. 1. The main circuit breaker is off. 2. The unit power switch is off. 3. The input power connector is not connected securely to the Control Board. 4. Low input AC voltage. 5. Bad Control Board.
2. OPERATOR DOES NOT RUN	When the unit power switch is cycled, LED's blink simultaneously or turn on randomly: 1. Low input AC voltage. 2. The processor was installed improperly into Control Board by the installer. 3. Bad Control Board. When the unit power switch is cycled, all LED's turn on and off (except Power On) at the same time: 1. On Manual Input Terminal TB2, the STOP terminals disconnected from the COMMON terminal. 2. An input is continuously activated (Stuck). 3. Low input AC voltage. 4. Bad Control Board. When the unit power switch is cycled, all LED's (except Power On) turn on at the same time and off one after another with the bottom LED turning off first (normal power up). 1. An input is continuously activated (stuck). 2. Both limit switches are stuck closed. 3. Stalled motor.
3. MOTOR DOES NOT RUN	Motor is dead: 1. The resettable motor thermal overload switch has popped. 2. The interconnecting cable between the motor and the control board is disconnected. 3. Bad control board. 4. Bad motor. Motor is stalled: 1. Frozen motor, gearbox or gate. 2. V-belt is too tight.
4. THE CONTROL BOARD RESETS RIGHT AFTER GATE STARTS MOVING	1. Low AC voltage. 2. Inadequate and undersized power wiring between the main circuit breaker and the gate operator.
5. GATE STOPS IMMEDIATELY AFTER IT STARTS	1. A Fault has occured. Mostly in cold weather or mornings: 2. A Fault has occured; Inrush pot adjustment is set too low. Power Fail Option was installed recently: 3. Gate sensitivity adjustments were not reset after installation of the Power Fail Option. 4. A Fault has occured.
6. GATE STOPS A FEW SECONDS AFTER IT STARTS	1. Stuck limit switch. 2. Limit cams overrun the limit switches prior to gate movement due to loose torque limiter. 3. A Fault has occured.
7. GATE STOPS WHILE OPENING OR REVERSES WHILE CLOSING	A Fault has occured.
8. OPENING GATE STOPS WHEN A VEHICLE APPROACHES THE GATE	SLIDE ACTION on switch S1 is set to OFF, causing the Interrupt loop to stop the gate.
9. GATE OPENS BUT DOES NOT CLOSE	1. Reclose Timer is OFF. 2. One of the inputs is continuously activated (a stuck input). 3. Entry system is connected to the Manual Input by mistake.
10. GATE DOESN’T STOP AT THE LIMIT	1. Limit cams are out off adjustments. 2. Limit switch cable is disconnected either from the control board or the limit switches. 3. Bad limit switch.
11. MOTOR STOPS BUT GATE OVERRUNS THE LIMIT	Torque limiter slips when the motor stops (The torque limiter is factory adjusted for 75 ft.lb.).
12. GATE IS TOO SLOW	1. Low input AC voltage 2. Hardened or frozen gate hinges. 3. Slipping torque limiter or belt.
13. GATE DOESN’T STAY OPEN/CLOSED WITH MANUAUFIRE INPUTS	1. Manual inputs or Fire were only activated momentarily not continuously.
14. GATE DOES NOT CLOSE AUTOMATICALLY	1. Reclose timer setting is OFF. 2. The entry system is connected to Manual open by mistake. 3. An input is continuously activated (stuck ).
15. OPERATOR DOESN'T RESPOND TO COMMANDS FOR A MINUTE	1. A fault has occurred and Retry is set to OFF.
16. ALTERNATE ACTION DOES NOT WORK	1. ATG and Reclose Timer are ON. 2. Entry system is connected to the Manual Input by mistake.
17. GATE DOES NOT OPEN TO THE CORRECT DIRECTION	1. The power was not cycled after changing the setting of switch S2. 2. Limit switches are miswired.
18. AN OPEN GATE DOES NOT CLOSE AT POWER UP	1. An input is continuously activated (Stuck). 2. The gate was not on the open limit switch when the power went out. 3. TIMER on switch S1 is set to OFF.
19. GATE DOES NOT MOVE AFTER POWER OUTAGE	1. Bad Power Fail Option battery. 2. Miswired DC motor inputs. 3. Bad connection between the Power Fail Option harness connector and the Control Board. 4. Power Fail Option Open direction (switch S3) is not set to the correct position. 5. Battery is connected backwards, causing resettable fuse on the control board to open.
20. POWER FAIL OPTION WORKS, BUT GATE DOESN’T STOP AT LIMIT	1. Miswired DC motor inputs. 2. Bad Power Fail Option harness.
21. BATTERY DOESN’T RECHARGE WITHIN 4 TO 5 HOURS AFTER USE	1. Old or bad battery. 2. Bad harness. 3. Bad Control board.
22. POWER FAIL OPTION MOVES THE GATE TOO SLOWLY	1. Old or not fully charged battery. 2. Hardened or frozen gate hinges. 3. Slipping torque limiter or belt. 4. Belt is too tight.
23. THERE IS SLACK OR PLAY IN THE GATE	1. Chain is too loose. 2. The hardware interconnecting the operator to the gate is not tight. 3. The large mounting bolt or the jam nut for the cap arm is not tight. 4. Set screws on the sprocket or the torque limiter are not tight.
24. ATG (ANTI-TAILGATE) DOES NOT WORK	1. The ATG setting on switch S1 is OFF. 2. Entry system is connected to Manual Open by mistake. 3. Interrupt loop or loop detector is not working properly.
25. INTERRUPT LOOP DOES NOT ACT PROPERLY	1. Improper SLIDE and ATG settings. 2. Bad loop sensor or loop detector. 3. Bad connection between the loop sensor, loop detector and the Control Board.
26. SHADOW LOOP IS INEFFECTIVE	1. The gate is not at either the open or close limit. 2. Bad loop sensor or loop detector. 3. Bad connection between the loop sensor, loop detector and the Control Board. 4. Only one gate is on the limit (Master/Slave systems only).
27. MAGLOCK DOES NOT WORK	1. Bad connection between Maglock, its power supply and the Control Board. 2. Bad Control Board( relay on the Control Board does not close). 3. Bad Maglock or Maglock power supply. 4. Large gap between gates.
28. MASTER/SLAVE SYSTEM	Units work as stand-alone: 1. Miswired or disconnected Master/Slave interconnect cable. 2. Improper Master/Slave switch S1 setting. 3. Bad control board. Units are not synchronized: Improper switch S1 Master/Slave settings. One gate braking to stop causes a fault in the other (moving) gate: 1. Both units are wired to the same circuit breaker. 2. Undersized power wires.

Chamberlain WGO200 gate opener troubleshooting

PROBLEM:	CAUSE:	REMEDY:
1.0 The gate does not open when a pulse is given.	1. Battery discharged. 2. 230V power supply is missing. 3. The back-up battery is empty.. 4. Only one motor is connected.	1. Replace battery of the remote control or temporarily use the keyswitch. 2. Check the 230V power supply switch or the fuse of the transformer amp. 0.8. 3. Switch jumper to a different position.
1.1 A motor opens and the other closes.	1. M1/M2 wrong connection.	1. Invert the connection cables to motors
1.2 Motors stop immediately.	1. Incorrect power. 2. Force stop has been activated.	1. Repeat the automatic force adjustment.
1.3 The gate does not close after opening.	1. Photocells jumper and/or photocells alignment. Fuses. 2. Automatic closure not activated. 3. START contact.	1. If no photocells are installed connect the terminal 1 with terminal 2 Align photocells. Check fuse 5A. 2. Re-program auto 2. 3. START contact permanently active. Check.
1.4 The Flashing lamp does not work.	1. Bulb fault. 2. Fuse fault.	1. Check the 12V max. 10W bulb. 2. Check fuse 5A.
1.5 The keyswitch does not work.	1. Connection fault.	1. Check electronic connections.
1.6 Motors work slowly after some years of operation.	1. Brushes fault.	1. Replace electric brushes.
2.0 Fuse 0.8 amp. burned.	1. Transformer burned. 2. Short circuit in the motors supply.	1. Check the transformer isolation. 2. Check motor cables.
2.1 Fuse 4 amp. burned.	1. Flashing lamp fault. 2. Photocells fault.	1 .Check, if there are short circuits in the supply of: 1. Flashing lamp or 2. Photocells.
2.2 Fuse 10 amp. burned.	1. Battery fault.	1. Check battery status.
3.0 Red LED off.	1. AC 230V power supply.	1. Check 0.8 Amp. fuse. 2. Check the AC 230V power supply connection.

Chamberlain CSO gate opener troubleshooting

Situation	Probable Cause & Solution
The opener doesn't operate from either the door control or the remote control:	1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.)
	2. Have you disabled all door locks? 3. Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any restriction.
	4. The garage door spring may be broken. Have it replaced.
	5. Repeated operation may have tripped the overload protector in the motor. Wait 15 minutes. Try again.
Opener operates from the remote control but not from the door control:	1. Is the door control button lit? If not, Remove the bell wire from the opener terminal screws. Short the red and white terminals by touching both terminals at the same time with a piece of wire. If the opener runs, check for a faulty wire connection at the door control, a short under the staples, or a broken wire.
	2. Are the wiring connections correct?
The door operates from the door control, but not from the remote control:	1. Does the battery test light glow when the remote control push button is pressed? If not, replace the battery.
	2. Program the receiver to match the remote control code.
	3. Repeat the receiver programming procedure with all remote controls.
The remote control has short range:	1. Check the battery test light. If the light is dim, change the battery.
	2. Change the location of the remote control in your car.
	3. Check to be sure the antenna on the back panel of opener extends fully downward.
	4. Some installations may have shorter range due to a metal door, foil backed insulation, or metal garage siding. Install Antenna Kit, Part No. 41A3504, to increase range.
Opener noise is disturbing in living quarters of home:	If operational noise is a problem because of proximity of the opener to the living quarters, the Vibration Isolator Kit 41A3263 can be installed. This kit was designed to minimize vibration to the house and is easy to install.
The garage door opens and closes by itself:	1. Be sure that all remote control push buttons and battery indicator lights are off.
	2. Remove the bell wire from the door control terminals and operate from the remote control only. If this solves the problem, the door control is faulty (replace), or there is an intermittent short on the wire between the door control and the opener.
The door doesn't open completely:	1. If the door has been working properly but now doesn't open all the way, increase the up force.
	2. Is something obstructing the door? Remove the obstruction or repair the door.
	3. If door opens at least 5 feet, the travel limits may need to be increased. One turn equals 2 inches of travel. Repeat the safety reverse test after the adjustment is complete.
The door stops but doesn't close completely:	Review the travel limits adjustment procedures. Repeat the safety reverse test after any adjustment of door arm length, close force or down limit.
The door opens but won't close:	1. If the opener lights blink, check the safety reversing sensor.
	2. If the opener lights do not blink and it is a new installation, check the down force.
The door reverses for no apparent reason and opener light doesn't blink:	1. Is something obstructing the door? Pull the manual release handle. Operate the door manually. If it is unbalanced or binding, call for professional garage door service.
	2. Clear any ice or snow from the garage floor area where the door closes.
	3. Review the force adjustment procedures. Repeat the safety reverse test after the adjustment is complete.
	4. If door reverses in the fully closed position, decrease the travel limits. Repeat safety reverse test after the adjustment is complete. The need for occasional adjustment of the force and limit settings is normal. Weather conditions in particular can affect door travel.
The door reverses for no apparent reason and opener light blinks for 5 seconds after reversing:	Check the safety reversing sensor. Remove any obstruction or align the receiving eye.
The opener light	... doesn't turn on: Replace the light bulb (75 watts maximum). Use a standard neck garage door opener bulb if regular bulb bums out. ... doesn't turn off: There may be a defective ground at the ceiling or wall receptacle. The unit must be grounded.
The opener strains or maximum force is needed to operate door:	The door may be out of balance or the springs are broken. Close the door and use the manual release handle to disconnect the trolley. Open and dose the door manually. A properly balanced door will stay in any point of travel while being supported entirely by its springs. If it does not, disconnect the opener and call for professional garage door service. Do not increase the force to operate the opener.
The opener motor hums briefly, then won't work:	1. The garage door springs are broken.
	2. If the problem occurs on the first operation of the opener, door may be locked. Disable the door lock. If the chain was removed and re-installed, the motor may be out of phase. Remove the chain; cycle the motor to the down position. Observe the drive sprocket. When it turns in a clockwise direction and stops in the down position, reinstall the chain. Repeat the safety reverse test after the adjustment is complete.
The opener won't operate due to power failure:	1. Use the manual release rope and handle to disconnect the trolley. The door can be opened and closed manually. When power is restored, press the door control button and trolley will automatically reconnect (unless trolley is in lockout position.)
	2. The Outside Quick Release accessory (for use on garages with no service door) disconnects the trolley from outside the garage in case of power failure.
The chain droops or sags:	It is normal for the chain to droop slightly in the closed door position. Use the manual release rope and handle to disconnect the trolley. If the chain returns to the normal height when the trolley is disengaged and the door reverses on a one-inch board (or a 2x4 laid flat), no adjustments are needed.

The name of the Chamberlain brand speaks for itself. One of the leaders on the gate opener market, the company sells its products both in the US and abroad through a wide dealership network.