Basic Programming; Introduction To Programming - Chamberlain GH User Manual

INTRODUCTION
Congratulations on purchasing a quality, LiftMaster Logic 4 Commercial Door Operator. Your new operator is capable of operating up to
12 cycles per hour or 50 cycles per day. It is equipped with a built in radio receiver that is compatible with our existing 315 MHz product
line as well as a Timer-to-Close (TTC) feature that can be enabled when LiftMaster Commercial Protector System
properly.

BASIC PROGRAMMING

INTRODUCTION TO PROGRAMMING

Many programmable functions require that a LiftMaster Entrapment Protection (LMEP) device be installed in order to function.
Refer to the Entrapment Protection section.
LOGIC BOARD OVERVIEW
Optional Auxiliary
Card Receptacles
Motor Direction Jumper
Maximum Run
Timer Button
Radio Learn Button
Mid Stop Learn Button
Timer-To-Close
Learn Button
Selector Dial
(used for programming
and selecting wiring type)
LOGIC BOARD LED OVERVIEW
NOTE: Before programming the logic board, set the operator's
open and close limits. LEDs on the logic board are provided to
assist setting the limits. As each limit is activated the
corresponding LED will light up. The abbreviations are Open Limit
Switch (OLS), Close Limit Switch (CLS) and Sensing Limit Switch
(SLS). Refer to page 19 for limit switch adjustment instructions.
When power is applied to the operator, the following LED's will
illuminate: STOP, CLOSE, OPEN, LMEP, 24Vac, RADIO, DATA,
TIMER ENABLE, OLS MID, SLS, CLS, and MAS. Once the power
up process is completed (approximately 2-3 seconds) only the
appropriate LED's will continue to be lit (i.e., STOP, 24Vdc, limit
LED(s) if limit(s) is activated).
NOTE: When the power up process is over, the MAS LED will
blink a code indicating the version of firmware. If the selector dial
is in the DIAG, OPTN, or PROG position, the MAS will not provide
this code. After the code has been provided the MAS LED will go
out.
24VAC
POWER
24VAC
TIMER
DEFEAT
OLS
COMMON
MID
MAS
SLS
CLS
LMEP:
MRT MID TTC TIMER
EDGE:
ENABLE
OPEN
RADIO 1 2 3
CLOSE
STOP
T TS
E2
FSTS
COMMON
D1
DIAG
C2 OPTN
PROG
B2
SBC
RELAY A
RELAY B
Main Motor Control Harness Connection
LOGIC BOARD PUSH BUTTONS (OPEN, CLOSE, STOP)
Open, Close and Stop buttons are mounted directly on the logic
board. Thus, making it easy to program as well as have door
control at the electrical box.
Either the stop control or a jumper MUST be wired between
terminals 4 and 5 for the on board push buttons to function.
2
DATA
Single Phase &
Three Phase Jumper
Maintenance Alert
System Button for
Programming
Open Button
Close Button
Stop Button
Control Wiring
Terminal Block
®
is installed and aligned