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Q & A for LM 902/LM901

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Question:    How to test limit switch?

Answer: There is 3 wires of the limit switch on the arm, you need to connect multimeter to yellow and black first, turn oms on the multimeter, then take magnet and move it right near limit switch, if you see some changes on the multi meter. If there is no changes then limit switch is not working and need to be replaced. Then connect multimeter to black and red wire of the limit switch and do the same thing.

 

Question: Wireless keypad fails to learn.  What do I do?

Answer

1. Check if the battery of the keypad is exhausted.

2. When the LED displays “Ln”, you should press the “ENTER” button once within 2 seconds to learn the keypad. If successful, the LED will flash “Ln” for 4 seconds. Default password is “888888”. You can press “* 8 8 8 8 8 8 ENTER” in sequence to operate the opener. for LM swing gate opener

When the REM LED light is on, you should press the “ENTER” button once within 2 seconds to learn the keypad. The REM LED light will flash for 4 seconds if learning has succeeded. Default password is “888888”. You can press “* 8 8 8 8 8 8 ENTER” in sequence to operate the opener. ( for DSD/C sliding gate opener )

3. Refer to the keypad manual, pull the antenna out and repeat “learn”.

Question: Wireless keypad fails to change the password. What do I do?

Answer

1. The password of the keypad must be 6-digit code.

2. You can press “* 8 8 8 8 8 8 #” for LM105 or press “ * 8 8 8 8 8 8 * ” for LM172 in sequence to enter the changing password step.

The LED will display “CH” (new version from 2011) after this; press a 6-digit new password then press “#” for LM105 or press “*” for LM172 to confirm the operation. If successful, the LED will flash “CH” for 2 seconds and then back to “- -”. ( for LM)

The REM LED light will be on; press a 6-digit new password then press “#” to confirm the operation. The REM LED light will flash for 4 seconds if changing has succeeded. ( for DS)

 

Question: I forgot the password of the wireless keypad 

Answer

You can re-learn the keypad to set the password back to factory default code(888888).

 

Question: Gates won’t open or close properly after the push button is pressed 

Answer

1. Check if the wire connection is loose.

2. The push button has been failed. Please replace with a new one.

Question : I install the loop detect and use it very well to open the get free of handbut the gate couldn’t closewhat do I do

Answer

Please set the automatic closing function in control board, ref to “Set the Automatic Closing Time” in Manual P.22, step 9. ( for LM )

Please set the automatic closing function in control board via turn the DIP Switch #6–#7, ref to “DIP Switch #6–#7: Auto close time of the gate operator” in manual. ( for DS )

 

Question: Why is my electric lock not working after operation for a period of time?

Answer:

Firstly, make sure the electric lock well connected to the terminal “LOCK” on the control board. If it still does not work, please disassembled the e-lock and control board. Then check it by following steps:

1. Check the tongue of the lock whether it can slide smoothly forward and backward with no stucking.

2. If the tongue of the lock can slide smoothly, please use a multi-meter to measure the resistance of the e-lock. The resistance is about 8.0 Ω of 24V e-lock and 80 Ω of 36V e-lock. Please power the e-lock with the corresponding voltage if the resistance is correct. If it still does not work please replace a 24V solenoid.

3. If both of the solenoid and tongue of the lock are fine, please use a multi-meter to check if output of the ‘LOCK’ terminal on the control board is 24V at the beginning of the opening. If there is no output voltage, please replace the control board. The board is broken.

1Question: Which do I select?  Pull to Open” or “Push to open”?

Answer: It is strongly recommend selecting “Pull to open”. The “Push to Open” option is used only for gates installed on upward slope to “towards” your property.

Warning: Swing gates shouldn’t open toward to public area when the” Pull to Open”is selected.                                                     

 

2Question: Why is the wire of limit switch near motor (open limit switch) too short to adjust?

Answer:  The switch near the motor is fixed in a factory position; it is non-adjustable in our design.

In “Pull to Open” installation, we dont suggest the user to adjust the open limit position since the desired gate open angle can be determined by installing the post brackets, pivot brackets and gate brackets.

In the beginning, the user should use a fully retracted actuator to determine the gate open position. Then fully extend the arm towards the gate closed position. Slide the limit switch which is farthest from the motor to adjust the gate in desired close position.

 

3Question: Is the control board defective in most situations when the gate opener does not work correctly or not at all?

Answer: In our experience, most trouble or failures can be attributed to incorrectly installed or programmed equipment. Don’t think the control board has been defective and/or require replacing before you check and try to solve the problem. Sometimes what you should to do is re-set or re-program the unit.

 

4Question: Both the actuators don’t work. LED has no display. What do I do?

Answer:

1. Check if the power is on.

Check the input voltage at the terminal. It should be local AC power. If the voltage measures 0 suing the voltmeter, the power cable may be damaged.

2. Check if the output voltage of the transformer is 24Volts AC. If the voltage measures 0, the transformer may be overheated or damaged. Turn power off and allow transformer to cool for several minutes then reset. Replace the transformer if the symptom still exists.

3. Check the fuse in the control board. Replace the fuse if necessary.

 

5Question: Both the actuators don’t work. Motors don’t run.  LED flashes ” ” when I operate the push button or wired keypad. How do I solve this?

 

Answer: Use a jumper wire to short the O/S/C terminal temporarily to operate the gate opener. If the gate works, re-connect the push button and wired keypad or replace them with a new one.

 

6Question: The gate opens, but doesn’t close. What do I do?

Answer:

Please check by following steps if a photocell is used in the system,

1. Check the connection of the photocell, both power LED of emitter and receiver will be ON if the connection is right.

2. Please ensure the beam is not blocked and try to operate it again.

3. Remove the photocell from the control board and then use a jumper wire to short the "PHOTOCELL" terminal. Try to operate it again, the photocell may be faulty if the gate can close. The control board may be damaged if the gate still doesn't close.

 

Make sure the P9 setting to 00 if a photocell is not used.

 

 

 

7Question: The gate begins to open or close but stops and reverses after a couple of seconds. What do I do ?

Answer:

1. Check that there is no obstruction in the gate travelling path.

2. The stall force has been set to too small; please adjust the stall force by setting “P5” “P6” to higher level.

3. Check if gates swing freely and with little effort. There may be a problem with the hinges.

 

8Question: One of the actuators doesn’t work, the other operates normally. What do I do?

Answer

1. Please make sure “P1” has been set to “11”.

2. Check if the clutch (emergency key) of the actuator has been released. (Make sure it is in the lock position).

3. Check the wire connection of the faulty actuator; ensure the wires have been connected tightly.

4. Exchange the wire connection of the two actuators. If the same failure doesn’t happen with the faulty arm, then the limit switch may be faulty. If the same failure happens with the second arm (originally working properly) the control board may be faulty.

 

5. You should confirm that the limit switch is defective .Use a jumper wire to short the “COM” terminal with “ULT” and “DLT” terminal relative to the opposite limit switches. Try to operate the arm again. The limit switch is defective if the failure disappears; please replace it with new one. Replace the motor if the failure still exists.

 

 

9Question: One of the actuators can move in one direction, but does not move the other direction. The other actuator is normal. What do I do?

Answer

1. Check the connection of the faulty actuator; ensure the wires have been connected tightly.

2. Exchange the wire connection of the two actuators. If the same failure still happens to the faulty arm, the limit switch may be faulty. If the same failure happens with the second arm (originally working properly), the control board maybe faulty.

 

3. Now we should confirm if the limit switch is defective .Use a jumper wire to short the “COM” terminal with “ULT” and “DLT” on the control board, try to operate again to check if the failure disappears.

The open limit switch is defective if the open failure disappears; please replace it by new one. The close limit switch is defective if the close failure disappears; please replace it by new one.

Replace the motor if the failure still exists.

 

10Question: One of the actuators does not reach the desired limit position, another actuator is normal. What do I do?

Answer

1. The soft stop period is too long; set “PD” to more than 25 seconds in order to short the soft running period.

2. Re-adjust the limit switch and increase the pull force level on the control board.

3. Check if the Max Motor Running Time(MRT) is too short, increase it if necessary

4. If above method doesn’t correct the failure. Exchange the connection of the two actuators. Check to see if the same failure still happens for normal actuator. If so, replace the control board.

 

11Question: Gates sometimes open unexpectedly but no control device has been pressed

Answer

1.         There could be interference in the control board. Erase all of remote controls entry codethen re-program (re-learn) the remote controls code to operate the gate.

2.         Check if the push button wire is longer than 10 meter. Only use STP (Shielded Twisted Pair) if length of your push button wire is longer than 15 meters.

 

12Question: Remotes fail to learn. What do I do?

Answer

1. Check battery of the remote.

2. When the LED displays “Ln”. Press the key in the remote two or more times within 2 seconds while learning. (The remote will fail to learn as soon as the interval between two pressing is longer than 2 seconds)

3. Contact local dealer to request a short video about remote programming to double check.

 

13Question: Wireless keypad fails to learn.  What do I do?

Answer

1. Check if the battery of the keypad.

2. When the LED displays “Ln”, you should press the “ENTER” button once within 2 seconds to learn the keypad. If successful, the LED will flash “Ln” for 4 seconds and back to “PC”. Default password is “888888”. You can press “* 8 8 8 8 8 8 ENTER” in sequence to operate the opener.

3. Refer to the keypad manual, pull the antenna out and repeat “learn”.

 

14Question: Wireless keypad fails to change the password. What do I do?

Answer

1. The password of the keypad must be 6-digit code.

2. You can press “* 8 8 8 8 8 8 #” in sequence to enter the changing password step. The LED will display “CH” (new version from 2011) after this; press a 6-digit new password then press “#” to confirm the operation. If successful, the LED will flash “CH” for 2 seconds and then back to “- -”.

 

15Question: I forgot the password of the wireless keypad

Answer

You can re-learn the keypad to set the password back to factory default code(888888).

 

16Question: Gates won’t open or close properly after the push button is pressed

Answer

1. Check if the wire connection is loose.

2. The push button has been failed. Please replace with a new one.

 

17Question: I can hear is running, but the gate doesn’t move.

Answer

1. If it was the first operation after installation, the clutch may be not engaged. Use the triangular key to engage the opener.

2. If a malfunction had happened in using, check the Part C, replace it by new one if it was broken.

3. Check the Part A, replace it with a new one if broken.

4. Check the Part B, replace it with a new one if broken.

(Ref to video or manual for instructions

 

18Question: It is hard to turn the Emergency release key.

Answer

1. Please move the gate to release pressure on actuator.

2. Check to make sure all parts are lubricated properly.

 

19Question: My gate system doesn’t work during freezing temperatures. What do I do?

Answer

Adjust the stall force in control board to meet the need to pull or push the gate.

Clean up the ice mass or snow on the gate parts.

 

20Question :The LED of control board show the “dF” when we re-install a new (update) control board which I order from dealer, what do I do?

Answer: Please press the “FUNC” button to let it shows “--“ if the LED of control board show “dF”. The unit enters standby mode.

 

(21) Question My gate opener works well but the external Lamp flashes every minute. I don’t like the Lamp blinks all time. What do I do?

 

Answer: When the “Automatic Closing Time” is set on the control board, the Lamp will blink all time.

You can cancel the set of “Automatic Closing Time” .

Please set the “0” in “PA” on the Digital Display of control board, the Lamp will stop blinking.

Refer to Manual P.22, step 9.” Set the Automatic Closing Time”.

 

 (22) Question: My gates dont close perfectly at the original closing position after some time use. They stop beyond the closing position. What do I do?

 

Answer: Re-adjust the closing limit switch and tighten the fixing screw to avoid limit switch movement. If you are located in an area with a lot of strong wind, we strongly recommend you install an electric lock to perfectly close your gates and the lock will better secure your gates or use a block at the closing position to stop the gates.

Please contact with your local dealer to order the electric lock LM149.