Force And Timer To Close - Chamberlain LiftMaster LA412 Owner's Manual

Force and Timer to Close

FORCE ADJUSTMENT
The operator is equipped a with an obstruction sensing
feature. If the gate encounters an obstruction the operator
will automatically reverse direction and stop. Based on the
length and weight of the gate it may be necessary to make
force adjustments. The force adjustment should be high
enough that small objects such as branches or wind will
not cause nuisance interruptions but low enough to prevent
serious injury to a person or a vehicle.
To adjust the force:
Using the 3-button remote or the Single Button Control
(SBC) button on the control board, open and then close
the gate. If the gate stops or reverses before reaching the
fully open or closed position increase the force by turning
the force control slightly. Run operator through a complete
cycle.
NOTE: Weather conditions can affect the gate movement,
so seasonal adjustment may be required. The force
control is factory set to the mid position.
FORCE
Minimum Force
TIMER-TO-CLOSE (TTC)
The TIMER TO CLOSE feature can be set to
automatically close the gate after a specifi ed time period.
The TTC is factory set to OFF.
If the TTC is set to the OFF position, then the gate
will remain open until the operator receives another
command from a remote control or SBC.
To set the TIMER TO CLOSE:
Rotate the TIMER TO CLOSE dial to the desired setting.
The range is 0 to 180 seconds, 0 seconds is OFF.
NOTE: Any radio command, SBC, or CLOSE command
on the control board prior to the TTC expiring will close the
gate. The TTC is reset by any signals from the loops, close
edges, and close safety sensors (IR's).
TIMER TO
OFF
Maximum Force
CLOSE
MAX
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing gate.
• Too much force on gate will interfere with proper operation
of safety reversal system.
• NEVER increase force beyond minimum amount required to
close gate.
• NEVER use force adjustments to compensate for a binding
or sticking gate.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Gate MUST reverse on contact with a rigid
object.
GATE 1
ACCESSORY
POWER
GATE 2
D4
D2
35
OPEN EDGE/
R223
CLOSE
EDGE
K6
ALARM
R2Ø7
NO
Z2Ø
LEARN
R227
C XMITTER
K5
MAGLOCK
PHOTO
NO
L1
BRN R224
C
GRN U4 Z22
NC R92
R2 ON
Z9
WHT
Z1 R1 OPEN
YEL 10A 32V PHOTO
BLU F3 R91
GATE 1
RED R94
D1Ø K2
Z8
FORCE
DIAGNOSTIC CLOSE
PHOTO
R93
GATE 2
Z12 K1 Q9
FORCE TIMER TO
CLOSE
BRN R9Ø
COM
OVLD
GRN ACCESSORY
CONTROL
OVLD
WHT 24V INPUTS
R1Ø1 OPEN
YEL
BRN R1ØØ SINGLE BUTTON
BLU
F4
GRN
RESET
10A 32V
RED
WHT
STOP
YEL OFF MAX
COM
BLU COM
R35 POWER
RED
K3 D9
GATE 2 D8 C12
Z3 F7 LOOP
INPUTS
Z4 C13
Q22 D22 C4
SHADOW
U3
INTERRUPT
C11
CHGR COM
D15
R196 OVLD
R4 C2
F6
24 VAC/ F2
F1 20A 32V
SOLAR
INPUT
MOV2
J4 R9 D4
MOV1
D1
BATT 2 BATT 1
Programming
TIMER TO
CLOSE
Z9
Z8 OFF MAX