TROUBLESHOOTING
To protect against fire and electrocution:
• DISCONNECT power (AC or solar and battery) BEFORE installing or servicing operator.
For continued protection against fire:
• Replace ONLY with fuse of same type and rating.
DIAGNOSTIC CODES
NOTE: When cycling or disconnecting power (ac/dc) to the control board, it is recommended that you unplug the J15 plug.
TO VIEW THE CODES
The codes will show on the diagnostic display.
DIAGNOSTICS DISPLAY
OPEN, CLOSE, & STOP BUTTONS
...then press and hold the OPEN button until "Er" shows on the display.
...then press and hold the
CLOSE button...
Press and hold the
STOP button...
DIAGNOSTICS
The operator will show the code sequence number followed by the code number:
CODE SEQUENCE NUMBER
The first number shown is the most recent code (example: "01"). The display will show the sequence of codes that occurred starting with "01" and going up to code "20".
A SECOND
LATER....
CODE NUMBER
The second number shown after the code sequence number is the code itself (31-99, example" "31"). Refer to the chart on the following page for an explanation of each code.
DIAGNOSTICS DIAGNOSTICS
TO SCROLL THROUGH THE SAVED CODES TO EXIT
Press and release the STOP button to exit. The display will also time out after two minutes of inactivity.
Press the OPEN button to cycle to the most recent code ("01").
Press the CLOSE button to cycle to the oldest code (up to "20").
The operator will only keep track of up to 20 codes, then will start saving over the oldest codes as new codes occur.
TO RESET THE CODE HISTORY
1. Press and hold the STOP button for six seconds. The display will show "Er" then "CL" alternately for six seconds.
2. Release the STOP button. The code history has now been reset and the display will show "- -" until a new code occurs.
3. Press and release the STOP button to exit.
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TROUBLESHOOTING
DIAGNOSTIC CODES continued...
Some codes are saved in the code history and some are not. If a code is not saved it will briefly appear on the display as it occurs, then disappear.
LiftMaster System Installed System Informational
External Entrapment
Protection
Inherent Entrapment
Protection
Code Meaning Solution
31
Main control board has experienced an internal failure.
32
Linear Drive Disengaged (Arm 1)
33
Linear Drive Disengaged (Arm 2)
Disconnect all power, wait 15 seconds, then reconnect power (reboot). If issue continues, replace main control board.
Disengage then re-engage arm. Check wiring and connections.
34
Absolute Position Encoder Error, not getting position information from encoder
Check APE assembly and wiring connections. Replace the APE assembly if necessary.
35
Max-Run-Time Exceeded Error
Product ID Error
36
Check for an obstruction, then reprogram the limits.
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
38
39
40
Product ID Failure
Hard Stop Limit (Arm 1)
Hard Stop Limit (Arm 2)
Battery overvoltage
Unplug product ID harness then plug back in. Disconnect all power, wait 15 seconds, then reconnect power before replacing product ID harness.
Limit may be set too tightly against a non-resilient hard stop (re-adjust limit).
Operator may be at end of travel (re-adjust mounting).
41
42
43
44
50
Battery overcurrent
No battery at boot up
Exit Loop Error
Shadow Loop Error
45
Interrupt Loop Error
46
Wireless edge battery low
Run-Distance Error
Too much voltage on the battery. Check harness. Make sure there is NOT a 24V battery on a 12V system.
Possible short of the battery charge harness. Check harness. Make sure you do
NOT have a 12V battery on a 24V system.
Check battery connections and installation. Replace batteries if depleted to less than 20V on a 24V system or less than 10V on a 12V system. Make sure there is
NOT a single 12V battery on a 24V system.
Failure or missing 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.
Replace batteries in wireless edge.
Gate unbalance detected. Make sure the gate is installed on a level surface and not on an excessive grade.
Check yellow pass-point wiring. If limits are not accurate, reprogram.
51
Pass-point not detected (Arm 1)
52
Pass-point not detected (Arm 2)
Brownout occurred
53
54
Wireless Second Operator Communication
Error
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.
Check the second operator for power. If OFF, restore power and try to run the system. If powered, deactivate the wireless feature and then reprogram the second operator.
Saved
NO
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
NO
YES
YES
35
TROUBLESHOOTING
DIAGNOSTIC CODES continued...
Some codes are saved in the code history and some are not. If a code is not saved it will briefly appear on the display as it occurs, then disappear.
Code
60
65
66
67
68
61
62
63
64
69
70
71
72
73
74
75
82
83
91
92
93
94
99
80
81
LiftMaster System Installed System Informational
External Entrapment
Protection
Inherent Entrapment
Protection
Meaning Solution
Minimum number of monitored entrapment protection devices (one) not installed.
Review monitored entrapment protection device connections.
CLOSE EYE/INTERRUPT held more than 3 minutes Check wired input on main control board; check for alignment or
CLOSE EDGE held more than 3 minutes obstruction.
OPEN EYE/EDGE held more than 3 minutes
CLOSE EYE/INTERRUPT held more than 3 minutes Check wired input on expansion board; check for alignment or
CLOSE EYE/EDGE held more than 3 minutes obstruction.
OPEN EYE/EDGE held more than 3 minutes
Wireless edge triggered more than 3 minutes
Wireless edge loss of monitoring
Wireless edge triggered
Check wired input for wiring issue or obstruction.
Check wireless edge inputs.
IF an obstruction occurred, no action required. If an obstruction did
NOT occur, check inputs and wiring.
IF an obstruction occurred, no action required. If an obstruction did
NOT occur, check alignment, inputs, and wiring on main control board.
CLOSE EYE/INTERRUPT triggered, causing reversal, preventing close, or resetting TTC
CLOSE EDGE triggered, causing reversal, preventing close, or canceling TTC
OPEN EYE/EDGE triggered, causing reversal or preventing opening
CLOSE EYE/INTERRUPT triggered, causing reversal, preventing close, or resetting TTC
IF an obstruction occurred, no action required. If an obstruction did
NOT occur, check alignment, inputs, and wiring on expansion board.
CLOSE EYE/EDGE triggered, causing reversal and preventing close or canceling TTC
OPEN EYE/EDGE triggered, causing reversal or preventing opening
Close input (EYE/EDGE) communication fault from other operator
Open input (EYE/EDGE) communication fault from other operator
Close input (EYE/EDGE) communication fault
(expansion board)
Open input (EYE/EDGE) communication fault
(expansion board)
Force Reversal (Operator 1)
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.
Check the connections between the main board and the expansion board.
Force Reversal (Operator 2)
RPM / STALL Reversal (Operator 1)
RPM / STALL Reversal (Operator 2)
Check for obstruction. If no obstruction, check that the mechanical assembly is engaged and free to move. See section on Limit and Force
Adjustment, and Obstruction Test.
Check for obstruction. If no obstruction, check the operator wiring and that the mechanical assembly is engaged and free to move. Replace
APE assembly.
Normal Operation No action required
Saved
NO
YES
YES
YES
YES
NO
NO
NO
YES
YES
YES
YES
YES
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