Chamberlain RSW12U Installation Manual page 33

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
Code Meaning
Main control board has experienced an
31
internal failure.
32 Linear Drive Disengaged (Arm 1)
33 Linear Drive Disengaged (Arm 2)
Absolute Position Encoder Error, not getting
34
position information from encoder
35 Max-Run-Time Exceeded Error
Product ID Error
36
Product ID Failure
37
38 Hard Stop Limit (Arm 1)
39 Hard Stop Limit (Arm 2)
Battery overvoltage
40
Battery overcurrent
41
No battery at boot up
42
43 Exit Loop Error
44 Shadow Loop Error
45
Interrupt Loop Error
46 Wireless edge battery low
Run-Distance Error
50
51
Pass-point not detected (Arm 1)
52 Pass-point not detected (Arm 2)
Brownout occurred
53
Wireless Second Operator Communication
54 Error
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 APE assembly and wiring connections. Replace the APE assembly if
necessary.
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.
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.
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.
External Entrapment
Informational
Protection
31
Inherent Entrapment
Protection
Saved
NO
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
NO
YES
YES