LiftMaster RSL12U RSL12U Troubleshooting Guide Manual - Page 16

DIAGNOSTIC CODES 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. When servicing of the operator is complete, erase the code history by pressing the STOP button until the display flashes "Er" then "CL" (about 6 seconds). When the codes have been erased the display will show "_ _". INHERENT ENTRAPMENT PROTECTION Code 91 Meaning Force Reversal (Operator 1), the primary operator has detected an obstruction. Force Reversal (Operator 2), the secondary operator has detected an obstruction. 92 RPM/STALL Reversal (Operator 1), the primary operator has detected an obstruction. 93 RPM/STALL Reversal (Operator 2), the secondary operator has detected an obstruction. 94 AC motor no start condition 95 Missing or damaged current 96 sensor 99 Normal Operation Symptom Solution Saved When attempting to open or close the • Press the reset button to shut the alarm off. gate, the gate stops and reverses about 1 foot and then stops. The diagnostic display shows 91. • Check for obstructions and debris in the gate's path. Remove any obstructions or debris. When attempting to open or close the gate, the gate stops and reverses about • Adjust the limits and force 1 foot and then stops. The diagnostic display shows 92. • Disconnect the gate and make sure the gate is able to move freely and all hardware is working correctly (i.e. gate hinges or wheels). YES • Make sure the gate and gate operator were installed correctly and the gate meets the specification requirements for the operator. • If all other solutions fail, there may be a damaged operator component (i.e. chain, sprockets, gear reducer, motor). Replace gate component if necessary. TEST: Attempt to run the operator. When attempting to open or close the • Press the reset button to shut the alarm off. gate, the gate stops and reverses about 1 foot and then stops. The diagnostic • Check the disconnect. display shows 93. • Check for obstructions and debris in the If you attempt to run the operator again after code 93, the gate will move then gate's path. Remove any obstructions or debris. stop and reverse about 1 foot, then • Adjust the limits and force stop. The alarm will sound for 5 minutes. This means that the operator has detected an obstruction twice in a row (double entrapment). • Disconnect the gate and make sure the gate is able to move freely and all hardware is working correctly (i.e. gate hinges or wheels). When attempting to open or close the • Make sure the gate and gate operator were YES gate, the gate stops and reverses about installed correctly and the gate meets the 1 foot and then stops. The diagnostic specification requirements for the operator. display shows 94. • If all other solutions fail, check the code If you attempt to run the operator again after code 94, the gate will move then stop and reverse about 1 foot, then stop. The alarm will sound for 5 minutes. This means that the operator history for code 34, which indicates the operator is not receiving information from the APE sensor. Check the APE assembly and connections. Replace APE assembly if necessary. has detected an obstruction twice in a TEST: Attempt to run the operator. row (double entrapment). a) The gate and motor are not moving a) Check for an obstructed gate, binding in the or moving too slow. mechanism, and relay board and start b) The motor is moving, but not the capacitor connections. gate c) Gate moves then stops. b) Check the encoder cup and sensor on the limit shaft, and wiring. Check the disconnect lever for SL595U operators. YES d) The motor doesn't run c) Check the encoder cup and sensor wiring. d) Make sure that the motor harness is plugged into the connector in the power board that matches the correct input power. The gate will move briefly when commanded then stop. No further operation will be allowed. Check and correct connections then power cycle operator. YES n/a No action required YES 15