Chamberlain LMWEKITU Manual page 4

Advanced Diagnostic Codes
Advanced diagnostic codes for the LMWEKITU are available in control board firmware version 3.5
or higher.
Check the firmware version of a DC operator board:
1. Remove the charger connector if installed.
2. Unplug the J-15 connector from the main board.
3. Wait for 20 seconds.
4. Plug in the J15 connector and observe the seven segment display.
5. Plug in the charger connector if it was installed.
Check the firmware version of an AC operator board:
1. Unplug the 24VAC IN connector from the control board.
2. Wait for 20 seconds.
3. Plug in the 24VAC IN connector.
The diagnostic display will flash a series of three codes. The third code is the firmware version, for
example: 3.5.
View Advanced Diagnostic Codes
First enter diagnostic mode, see View Diagnostic Codes page 3. Then follow the instructions for
your operator type.
DC operators:
1. Press and hold the SET CLOSE button until "Ad" shows on the diagnostic display.
2. Release the SET CLOSE button.
AC operators:
1. Press and hold the OPEN RIGHT button until "Ad" shows on the diagnostic display.
2. Release the OPEN RIGHT button.
DC Operator Control Board
The operator will show the advanced code sequence number followed by the advanced code
number. The operator will save the 20 most recent codes. Use the OPEN and CLOSE buttons to
scroll through the saved codes.
The digits used in advanced diagnostic codes are hexadecimal values 0-9 and A-F:
0-9
A-F
Blank (no code)
Advanced Diagnostic Codes for LMWEKITU
Loss of Bluetooth wireless
communication for an open edge
Ab
Loss of Bluetooth wireless
communication for a close edge
AC
Loss of I2C communication for an
open edge
Ad
Loss of I2C communication for a
close edge
AE
More than one problem may exist. A combination of issues may be affecting the
performance of the LMWEKITU. Work each issue individually until all LMWEKITU
advanced diagnostics stop logging.
AC Operator Control Board
SET CLOSE
button
OPEN RIGHT button
Check the Bluetooth signal of any transmitter
installed for the open direction. See Bluetooth
Communication Troubleshooting page 5.
Check the Bluetooth signal of any transmitter
installed for the close direction. See Bluetooth
Communication Troubleshooting page 5.
See I2C Communication Troubleshooting
page 5. NOTE: If there is an edge in both
directions, Ad and AE may both be showing in the
advanced diagnostic log.
See I2C Communication Troubleshooting
page 5. NOTE: If there is an edge in both
directions, Ad and AE may both be showing in the
advanced diagnostic log.
Transmitter and Receiver Troubleshooting
• Test programming from transmitters to receiver, see 6 TEST page 2. Ensure you receive a
signal (status LED) when you depress the edge(s). Reprogram transmitters as necessary.
• Test the battery status in all transmitters, see BATTERY STATUS page 3. Replace batteries if
necessary. Energizer Ultimate Lithium AA L91 batteries are REQUIRED as replacements. If
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incorrect batteries are installed, the transmitter will fail within a few months.
• Check the OPEN/CLOSE DIP switch configuration on transmitters for correct open or close
direction, see 2 INSTALL TRANSMITTER BATTERIES AND SET EDGE DIRECTION page 2. If
you change the dip switch configuration unlearn and relearn all safety devices. Refer to your
gate operator manual for relearning safety devices.
• If using the I2C interface board, bypass the board to test the receiver:
1. Unplug the I2C board from the control board.
2. Connect the receiver to the EXP. BOARD terminal on the control board.
3. Test for proper operation from the edge sensor(s), see 6 TEST page 2. If edge sensor(s)
operate normally then replace I2C board or check for proper installation of I2C board to
expansion board, see 1 WIRE THE RECEIVER page 1.
Edge Sensor Troubleshooting
• Open the edge sensor caps and ensure the contact plug is installed correctly and the pins are
not corroded. Make sure that the lower edge cap is installed correctly, the weep holes are open
and free of obstruction, and the sense resistor pins are not corroded.
Incorrect
Correct
• Test edge sensor wiring:
1. Remove the wires from the transmitter terminal blocks.
2. Measure the resistance between the two wires to the edge. The resistance should read 8.0kΩ
to 8.4kΩ without the edge depressed.
- If it reads open (infinite ohms), the resistor is missing or incorrectly installed. Make sure
the contact plug installed as shown above. Cut 1/4" - 1/2" off the edge and reinstall the
contact plug as shown. If it still reads open, replace the edge.
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- If it reads below 100Ω, replace the edge.
3. Depress (squeeze) the edge. If it reads more than 100Ω, replace the edge.
4. Replace the parts on the edge when complete.
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4
Insert pins here
Pins must make
contact with
conductive area
in the edge