LiftMaster SL585 Manuals & Support

To see codes, press and hold STOP, then CLOSE, then OPEN until "Er" shows on the diagnostic display. The display shows each saved code in order, starting with the most recent (01), up to 20 codes. Press STOP to exit.

Safety device codes

• 60: the minimum monitored devices are not installed. A slide gate needs one external device in the close direction and one in the open direction.
• 61 to 66: a photo eye or edge was held more than 3 minutes. Check alignment, wiring and obstructions.
• 70 to 75: a photo eye or edge tripped and reversed the gate. If nothing was in the way, check alignment, inputs and wiring.

Travel and motor codes

• 35: max run time exceeded. Check for an obstruction, then reprogram the limits.
• 50: run distance error. Check the limit positions and that the switches work.
• 91: force reversal. Check that the gate moves freely, then recheck the force setting.
• 93: RPM or stall reversal. Check the operator wiring and the APE encoder assembly.
• 95: AC motor did not start. Check the motor, the relay board and the start capacitor connections.

Power and board codes

• 31: board failure. Remove all power for 15 seconds, then reconnect. Replace the board if it comes back.
• 47 or 59: power board fault or missing power board. Check the harness and the power board.
• 53, 55 or 56: brownout, AC overvoltage or AC undervoltage. Check supply voltage and wire gauge to the operator.
• 57 or 58: limit switch stuck or wrong switch. Check the limit switches and motor wiring.

Loop and dual gate codes

• 43 to 45: exit, shadow or interrupt loop error on a LiftMaster plug-in detector. Check the loop for a short or open.
• 54: lost wireless link to the second operator. Check its power, then relearn the second operator.