Chamberlain 3850 Garage Door Opener User Manual


 
30
Care of Your Opener
MAINTENANCE SCHEDULE
Once a Month
• Manually operate door. If it is unbalanced or binding,
call a trained door systems technician.
• Check to be sure door opens & closes fully. Adjust
limits and/or force if necessary (see pages 23 and 24).
• Repeat the safety reverse test. Make any necessary
adjustments (see Adjustment Step 3).
Once a Year
• Oil door rollers, bearings and hinges. The opener does
not require additional lubrication. Do not grease the
door tracks.
THE REMOTE CONTROL BATTERY
The lithium battery should produce power
for up to 5 years. To replace battery,
use the visor clip or screwdriver blade
to pry open the case as shown. Insert
battery positive side up.
Dispose of old battery properly.
NOTICE: To comply with FCC and or Industry Canada (IC) rules, adjustment or modifications of
this receiver and/or remote control are prohibited, except for changing the code setting or
replacing the battery. THEREARE NO OTHERUSER SERVICEABLE PARTS.
Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
To prevent possible SERIOUS INJURY or DEATH:
• NEVER allow small children near batteries.
• If battery is swallowed, immediately notify doctor.
WARNING
CAUTION
WARNING
WARNING