Chamberlain GH Owner's Manual page 14

Set / Reset Maximum Run Timer
Begin with door in closed position. Set dip switch to max. run timer
mode. Press control station open button to operate door from closed to
full open position without stopping. Set dip switch to desired operating
mode (B2, C2, D1, E2, T, TS).
Adjustable Mid Stop
Set: Begin with door in closed position. Set dip switch to adj. mid stop
mode. Press control station open button to operate door from closed to
mid stop position and stop with control station stop button. Set dip switch
to desired operating mode (B2, C2, D1, E2, T, TS).
Clear: Begin with door in closed positon. Set operator in set mid stop
mode. Press control station open button. Allow the door to run to the
open limit. Set the dip switch to desired operating mode (B2, C2, D1,
E2, T, TS).
Set Timer to Close (NOTE: Requires P/N 1A4811 CPSII
Option Board with Timer to Close Function.)
Set dip switch to timer to close mode. Momentarily press control station
open button to set timer duration in 5 second increments. (Red
diagnostic L.E.D. will flash to indicate the entry of each 5 second
increment into memory). To re-set timer memory to zero, press control
station close button. Set dip switch to (T or TS) operating mode after
timer is programmed.
Diagnostic Mode
Set dip switch to diagnostic mode. Flashing red diagnostic L.E.D.
indicates proper microprocessor function. If the diagnostic L.E.D. does
not light, the control logic board requires replacement.
OPTIONAL CONTROL SETTINGS
14
1 2 3
Set
max.
run
OFF
timer
1 2 3
Set
adj.
mid
OFF
stop
1 2 3
Set
timer
to close
OFF
1 2 3
Diagnostic
mode
OFF
4
4
4
4