Diagnostic Codes Table - Chamberlain LA400UL Installation Manual

Diagnostic Codes Table

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
Code Meaning
31
Main control board has experienced an internal
failure.
32
Linear Drive Disengaged (Arm 1)
33
Linear Drive Disengaged (Arm 2)
35
Max-Run-Time Exceeded Error
36
Product ID Error
37
Product ID Failure
38
Hard Stop Limit (Arm 1)
39
Hard Stop Limit (Arm 2)
40
Battery overvoltage
41
Battery overcurrent
42
No battery at boot up
43
Exit Loop Error
44
Shadow Loop Error
45
Interrupt Loop Error
46
Wireless edge battery low
51 Pass-point not detected (Arm 1)
52 Pass-point not detected (Arm 2)
53 Brownout occurred
54 Wireless Second Operator Communication Error
Minimum number of monitored entrapment
60
protection devices not installed.
61 CLOSE EYE/INTERRUPT held more than 3 minutes
62 CLOSE EDGE held more than 3 minutes
63 OPEN EYE/EDGE held more than 3 minutes
64 CLOSE EYE/INTERRUPT held more than 3 minutes
65 CLOSE EYE/EDGE held more than 3 minutes
66 OPEN EYE/EDGE held more than 3 minutes
67 Wireless edge triggered more than 3 minutes
68 Wireless edge loss of monitoring
TROUBLESHOOTING
Installed System
Solution
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.
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.
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).
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.
Check yellow pass-point wiring. If limits are not accurate, reprogram.
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 re-learn
the second operator.
Review monitored entrapment protection device connections. This swing
gate operator will operate only after installation of a minimum of one
external safety device in either the open or close direction.
Check wired input on main control board; check for alignment or
obstruction.
Check wired input on expansion board; check for alignment or
obstruction.
Check wired input for wiring issue or obstruction.
Check wireless edge inputs.
Informational
35
External Entrapment
Protection
Inherent Entrapment
Protection
Saved
NO
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
NO
YES
YES
NO
YES
YES
YES
YES