Page 43: Wiring diagram + diagnostic codes, Wiring diagram diagnostic codes, Gate 1, Gate 2

1. Liftmaster Manual Pdf
2. Error Code 4 6 Liftmaster
3. Liftmaster Error Code 11
4. Liftmaster Error Code 1 5
5. Liftmaster Motor Control Error 1 5

Liftmaster 371lm Garage Door Opener Remote - Source: https://www.amazon.com/Liftmaster-371LM-Garage-Opener-Remote/dp/B000CST0L0. View and Download Chamberlain 8550 manual online. Belt Drive Garage Door Opener. 8550 Garage Door Opener pdf manual download. Whether you are having issues getting your remote working, need to make a code change to your remote and control panels or are having trouble with the function of your doors or gates, choosing a certified Liftmaster troubleshooting specialist is the best option. Some may try to fix the device and mechanism without any solid knowledge about it.

42

TROUBLESHOOTING

» WIRING DIAGRAM + DIAGNOSTIC CODES

To protect against fire and electrocution:
• DISCONNECT power and battery BEFORE installing or servicing operator.

For continued protection against fire:
• Replace ONLY with fuse of same type and rating.

Z22

R91

CLOSE
EDGE

R94

R92

R93

L1

R1

R2

Z1

K5

K2

F3

10 A 32 V

D1 ÿ

OPEN EDGE/

PHO T O

OPEN
PHO T O

CLOSE
PHO T O

J18

R227

R2 ÿ 7

Z2 ÿ

R223

P1

Z9

Z8

F2

F6

D4

D2

R9

C64

JMPR1

R224

U4

P2

J1

J19

SINGLE

BUT T O N

CONTROL

INPUTS

FORCE

BI P A R T

DEL A Y

TIMER T O

CLOSE

MIN MAX OFF MAX OFF MAX

OPEN

SINGLE BUT T O N

RESET

S T O P

SHADOW

S1

INTERRUPT

CHGR
OVLD

COM

COM

COM

FUSE
OPEN

LOOP

INPUTS

POWER

B A T T 1

B A T T 2

F1 20 A 32 V

R35

D9

Z3

Z4

U3

D1

D27

F5

C 1 1

C13

C12

D15

C2 R4

R1 ÿ 1

R1 ÿÿ

R9 ÿ

Q9

K1

R196

Q22

D8

K3

Liftmaster Manual Pdf

K4

D21

D22

C4

ACCESSO R Y

OVLD

D6

JMPR2

MOV1

MOV2

DB1

U2

Z12

24 V AC /

INPUT

G A TE 2

MAGLOCK

ALARM

C

C

NC

NO

NO

GRN

WHT

YEL

BLU

RED

BRN

GRN

WHT

YEL

BLU

RED

BRN

F4

10 A 32 V

F7

24V

24V

COM

OVLD

OVLD

SWITCHED

ACCESSO R Y

POWER

TIMER

RUNNING

G A TE 2

SET

OPEN

LIMIT

SET

CLOSE

LIMIT

LEARN
LIMITS

DIAGNOSTIC

G A TE 1

J4

S A V E
MAGLOCK
MODE
EDGE
PHO T O

OFF
OFF

SINGLE

NO
NO

ON
ON
DUAL
NC
NC

LEARN

XMITTER

S8

1 2 3 4 5

O

N

2

1

ANTENNA

CONNECTION

YELLOW/GREEN

(OR OPTIONAL EARTH GROUND WIRE)

GROUND

G R N

W H T

YE L

B L U

R E D

B R N

GATE 1

G R N

W H T

YE L
B L U

R E D

B R N

K6

EDGE EDGE

OR

EDGE

EDGE

OR OR

PHO T O

PHO T O

OR OR

OR OR

PHO T O

PHO T O

CPS-LN4

24VDC OUTPUT
SWITCHED OFF

IN LOW POWER MODE

OPEN (EXI T LOOP )

SINGLE BUT T O N

RESET

S T O P

COMMON (+24VDC)
COMMON (+24VDC)

SHADOW LOOP

INTERRUP T LOO P

COMMON (+24VDC)

GATE 2

RED

BLA

CK

RED

BLA

CK

BLUE

YELLO

W

GATE 1

ACCESSORY

POWER

1. ANTENNA INPUT
2. CLOSE EDGE
3. OPEN EDGE/PHOTO EYE
4. OPEN PHOTO EYE
5. CLOSE PHOTO EYE
6. 24VDC ACCESSORY OUTPUT
7. CONTROL INPUTS/EXIT LOOP
8. LOOP INPUTS, SAFETY/SHADOW
9. TRANSFORMER INPUT
10. SECOND - OPERATOR ARM CONNECTION
11. 24VDC ACCESSORY OUTPUT
12. MASTER OPERATOR ARM CONNECTION

13. MAGLOCK/SOLENOID OUTPUT
14. FAULT ALARM OUTPUT
15. BATTERY INPUT #1
16. BATTERY INPUT #2
17. DIP SWITCH, S1
18. LEARN XMITTER
19. MASTER GATE JOG
20. LIMIT SET
21. SECOND GATE JOG
22. SBC (SINGLE BUTTON CONTROL)
23. FORCE SET
24. BIPART DELAY SET
25. TIMER TO CLOSE SET

7

8

15

2

3

4

5

6

1

16

23

24

25

9

21

20

19

10

11

12

18

14

22

13

17

NOTE:Batteries must be connected
to operate.

NOTE:Yellow/green wire must
be disconnected when earth
ground rod is installed.

CPS-LN4

CPS-LN4

MAGLOCK

C

NC

NO

MAGLOCK

C

NC

NO

Fault Alarm

Siren (optional)

Flashing Strobe (optional)

Solenoid Lock

(optional)

Maglock

Error Code 4 6 Liftmaster

(optional)

(not provided)

(not provided)

WIRING DIAGRAM

DIAGNOSTIC CODES

# OF BLINKS

MEANING

1

No Stop Switch Connected

2

Gate 1 Arm Disengaged

3

Gate 2 Arm Disengaged

4

Both Gate Arms Disengaged

5

RPM Reversal

# OF BLINKS

MEANING

6

Force Reversal

7

Processor Reset

8

ROM Check Failed

9

RAM Check Failed

10

EEPROM Check Failed - Reset Limits

1

For use with Security✚ 2.0

TM

Garage Door Openers. All Security✚ 2.0

TM

Garage Door Openers have a

yellow Learn button and two yellow antennas. The features are adjustable and may be turned off or on
as desired. Refer to the Feature Settings section.

Smart Control

Panel

®

Safety
Reversing
Sensors

Yellow
LEARN Button

SMART CONTROL PANEL

®

MODEL 880LM

To prevent possible SERIOUS INJURY or DEATH from electrocution:

• Be sure power is NOT connected BEFORE installing door control.

• Connect ONLY to 12 VOLT low voltage wires.

To prevent possible SERIOUS INJURY or DEATH from a closing garage door:

• Install door control within sight of garage door, out of reach of children at a minimum height of

Liftmaster Error Code 11

5 feet (1.5 m), and away from ALL moving parts of door.

• NEVER permit children to operate or play with door control push buttons or remote control

transmitters.

Liftmaster Error Code 1 5

• Activate door ONLY when it can be seen clearly, is properly adjusted, and there are no

obstructions to door travel.

• ALWAYS keep garage door in sight until completely closed. NEVER permit anyone to cross path

of closing garage door.

Feature Overview

MAINTENANCE ALERT SYSTEM (MAS)

This feature assists the homeowner in ensuring the garage door opener system stays in good working
condition. A maintenance alert message will display on the screen indicating the garage door opener
may be in need of maintenance.

The MAS feature MUST be activated at time of installation. The factory setting is off.

LOCK

The LOCK feature is designed to prevent activation of the garage door opener from remote controls
while still allowing activation from the door control and keyless entry. This feature is useful for added
peace of mind when the home is empty (i.e. vacation).

LIGHT BUTTON

Press the LIGHT button to turn the garage door opener lights on or off. When the lights are turned on
they will stay on until the LIGHT button is pressed again, or until the garage door opener is activated.
Once the garage door opener is activated the lights will turn off after the specified period of time (the
factory setting is 4-1/2 minutes). The LIGHT button will not control the lights when the door is in
motion. The duration of the light timing can be adjusted by accessing the menu using the navigation
buttons.

SCREEN

The screen will display the time and temperature until the menu button is pressed, and then it will
display the menu options. If there is a problem with the garage door opener the screen will display the
Diagnostic Code.

MOTION SENSOR

The motion sensor will automatically turn on the garage door opener lights when motion is detected.
The lights will come on for the set period of time, then shut off. The factory setting is on and set at
4-1/2 minutes.

TIMER-TO-CLOSE (TTC)

Liftmaster Motor Control Error 1 5

DO NOT enable TTC if operating a one-piece door. TTC is to be used ONLY with sectional doors.
Factory default is set to off. TTC can be set to automatically close your garage door from the fully
open position after a specified period of time (1, 5, 10 minute intervals or a custom setting up to 99
minutes). The garage door opener will beep and the lights will flash before closing the door. The
screen on the door control can display the status of the TTC. TTC WILL NOT work if the garage door
opener is operating by battery power or if the safety reversing sensors are misaligned. This feature is
NOT intended to be the primary method of closing the door. A keyless entry should be installed in
the event of an accidental lock out when using this feature.

• SMART CONTROL PANEL®MODEL 880LM
  • Feature Overview
  • Installation
  • Operation
  • Program
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