Chamberlain Whisper Drive WD822K Owner's Manual page 34

Having a Problem? (Continued)
Adjustment Step 2.
Adjustment Step 1.
Repeat the safety reverse test after the adjustment is
complete.
Repeat the safety reverse test after any adjustment
of door arm length, close force or down limit.
Installation Step 10.
Step 2
Repeat the safety reverse test after the adjustment
is complete.
Adjustment Step 2
Repeat safety reverse test after adjustments to force
or travel limits. The need for occasional adjustment
of the force and limit settings is normal. Weather
conditions in particular can affect door travel.
Adjustment
(Adjustment Step 1)
Installation Step 10.
Repeat the safety reverse test after the adjustment is
complete.