LiftMaster RSL12U RSL12U Installation Manual - Page 31

TROUBLESHOOTING To protect against fire and electrocution: • DISCONNECT power (AC or solar and battery) BEFORE installing or servicing operator. For continued protection against fire: • Replace ONLY with fuse of same type and rating. DIAGNOSTIC CODES NOTE: When cycling or disconnecting power (ac/dc) to the control board, it is recommended that you unplug the J15 plug. TO VIEW THE CODES The codes will show on the diagnostic display. Press and hold the STOP button... ...then press and hold the CLOSE button... ...then press and hold the OPEN button until "Er" shows on the display. OPEN, CLOSE, & STOP BUTTONS DIAGNOSTICS DISPLAY The operator will show the code sequence number followed by the code number: CODE SEQUENCE NUMBER The first number shown is the most recent code (example: "01"). The display will show the sequence of codes that occurred starting with "01" and going up to code "20". A SECOND LATER.... CODE NUMBER The second number shown after the code sequence number is the code itself (31-99, example" "31"). Refer to the chart on the following page for an explanation of each code. TO SCROLL THROUGH THE SAVED CODES Press the OPEN button to cycle to the most recent code ("01"). Press the CLOSE button to cycle to the oldest code (up to "20"). The operator will only keep track of up to 20 codes, then will start saving over the oldest codes as new codes occur. TO EXIT Press and release the STOP button to exit. The display will also time out after two minutes of inactivity. TO RESET THE CODE HISTORY 1. Press and hold the STOP button for six seconds. The display will show "Er" then "CL" alternately for six seconds. 2. Release the STOP button. The code history has now been reset and the display will show "- -" until a new code occurs. 3. Press and release the STOP button to exit. 30