15C. Safe-T-Beam® (STB) System CheckCheck that both the RED and GREEN LEDs are ON steady. This indicatesthe system is working properly. If both LEDs are not ON steady, checkthe appropriate items below:• STB red LED flashes.– Check for obstruction.– Check alignment.– Verify wire routing from STBs to STB connection in powerhead– Check for signal interference from another Safe-T-Beam® unit(for multiple door installations).• No STB red or green LED displayed.– Check wiring and wire connectionsIf system appears to be working properly, perform check as follows:1. Start the door closing.2. Pass an object through the beam. The door should stop andreverse to the fully open position.– Door should remain stationary or move very slowly.– If door moves quickly, CONTACT A TRAINED DOOR SYSTEMTECHNICIAN to have your door springs serviced.• Close the door.• Place the carriage in the “engage” position (see illustration).• Operate door using remote or wall control. The carriage willreattach itself to the drive chain/belt.Maintenance and Adjustments (continued)Remote Battery Replacement (3-button)Replace remote battery with a CR2032 coin cell battery.1. Open remote case using a washer or coin that fits into the slot on the top of the remote.2. Replace battery. Be sure positive side is UP.3. Align components and snap case closed.• Raise and lower the doormanually — it should movefreely and smoothly.• Raise door manually about3’ to 4’ feet and let go.Perform the check as follows:• With the door closed, pull manual emergency release handleDOWN and toward the door and let go to disengage the carriagefrom the drive chain or belt (see illustration).D. DOOR BALANCE (spring tension)E. BATTERY REPLACEMENTDOORDisengageEngageRemote Battery Replacement (1-button)Replace the remote battery with a CR2032 coin cell type battery.1. Slide the battery cover off (it’s the lower half of the remote’s case) by pressing on the case just belowthe indentation at the top of the cover and sliding it down. Alternately, insert a coin or small washer intothe indentation in the front of the case and pry to unlatch the battery cover in order to slide it off.2. Slide out the old battery and slide in the new. Be sure positive side (+) is UP.3. Slide the battery cover on until it snaps into place.Regular MaintenanceBasic monthly maintenance tasks include:• Contact Reverse Test• Lubricate door hardware• Safe-T-Beam® System check• Door balance• Remote Battery Replacement (As needed)• Light Bulb Replacement (As needed)A. Contact Reverse TestSee page 8.B. Lubricate Door HardwareInspect door rollers and hinges and lubricate as needed using alight weight general purpose grease.