38
DIAGNOSTIC CODES continued...
TROUBLESHOOTING
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 Meaning Solution Saved
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.
NO
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.
YES
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.
YES
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.
YES
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.
YES
44
Loop Error - Failure or missing shadow 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.
YES
45
Loop Error - Failure or missing interrupt 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.
YES
46 Wireless edge battery low Replace batteries in wireless edge. YES
47
Motor control board fault Relay fault detected in the motor control board. Replace the motor
control board.
YES
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.
YES
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.
YES
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.
YES
55 System AC Overvoltage Call utility. YES
56 System AC Undervoltage Check wiring and wire gauge to operator. YES
57
Limit Error - Stuck Switch Check switch for proper operation. Check harness for shorts. Replace
if defective.
YES
58 Limit Error - Wrong Switch Check motor wiring. YES
59 Missing Power Board Check harness for shorts. Check for presence of power board. YES
60
Minimum number of monitored entrapment
protection devices (one) not installed.
Review monitored entrapment protection device connections.
NO
61
CLOSE EYE/INTERRUPT held more than 3 minutes
(main board)
Check CLOSE EYE/INTERRUPT input on main board; check for
alignment or obstruction.
YES
62
CLOSE EDGE held more than 3 minutes (main
board)
Check CLOSE EDGE input on main board; check for alignment or
obstruction.
YES
63
OPEN EYE/EDGE held more than 3 minutes (main
board)
Check OPEN EYE/EDGE input on main board; check for alignment or
obstruction.
YES
64
CLOSE EYE/INTERRUPT held more than 3 minutes
(expansion board)
Check wired input on expansion board; check for alignment or
obstruction.
YES
65
CLOSE EYE/EDGE held more than 3 minutes
(expansion board)
Check wired input on expansion board; check for alignment or
obstruction.
YES
LiftMaster System Installed System Informational
External Entrapment
Protection
Inherent Entrapment
Protection
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