50-CP4 - Uncategorized LiftMaster - Free user manual and instructions

Product Type	Garage Door Opener Control Board
Brand	LiftMaster
Model	50-CP4
Compatibility	LiftMaster, Chamberlain, and Craftsman openers (select models)
Dimensions	4.5 x 3.5 x 1.2 inches
Weight	0.5 lbs
Power Supply	24V AC from opener
Operating Temperature	-20°F to 140°F
Functions	Controls up/down travel, limits, safety sensors, and remote operation
Inputs	Wall button, remote receiver, safety sensor, and obstruction detection
Outputs	Motor relay, light relay, and status indicator
Safety Features	Built-in obstruction detection, safety sensor loop, and manual override
Diagnostic LEDs	Yes, for troubleshooting
Mounting	Snap-in or screw mount inside opener housing
Wiring Connection	Plug-in harness or screw terminals
Replacement	Direct replacement for 50-CP4 original part
Maintenance	Periodic visual inspection and cleaning of connections
Repair Difficulty	Easy to moderate; requires basic electrical knowledge
Warranty	2-year limited warranty by LiftMaster

Frequently Asked Questions - 50-CP4 LiftMaster

Is the LiftMaster 50-CP4 compatible with my garage door opener?

The 50-CP4 is designed for select LiftMaster, Chamberlain, and Craftsman openers made after 1993. Check your opener's model number for compatibility. It often replaces older control boards like 50-CP3 or 50-CP5.

How do I program the limits on the 50-CP4?

Press and hold the 'UP' or 'DOWN' button until the door moves to the desired limit, then release. Use the '+' and '-' buttons to fine-tune. Refer to your opener's manual for step-by-step programming.

Why won't my door close with the 50-CP4 installed?

Check safety sensor alignment (green/amber LEDs). Also, ensure the obstruction detection is not triggered. If the door reverses on contact, the travel limits may need adjustment.

Can I use the 50-CP4 with a battery backup?

Yes, the 50-CP4 supports battery backup accessories. Connect the backup unit to the designated terminals (typically 24V input). The board will switch to battery power during outages.

How do I reset the 50-CP4 to factory settings?

Unplug the opener, remove the board, and disconnect the battery backup (if any). Wait 30 seconds, then reconnect power. This clears all limits and remote codes. Re-program as needed.

What do the LED flashes on the 50-CP4 mean?

One flash: safety sensor issue. Two flashes: obstruction detected. Three flashes: travel limit error. Four flashes: motor fault. Refer to the manual for a full diagnostic chart.

Is the 50-CP4 compatible with smart home systems like MyQ?

The 50-CP4 itself does not have built-in Wi-Fi. However, it works with external MyQ hubs or LiftMaster Internet Gateway to enable remote control via smartphone.

How do I replace the 50-CP4 control board?

Disconnect power, remove the opener cover, unplug the old board, and snap in the new one. Reconnect all wires (sensors, wall button, motor). Power up and test. Always follow safety precautions.

What is the voltage rating for the 50-CP4?

The board operates on 24V AC supplied by the garage door opener's transformer. It draws minimal current (less than 100 mA). Do not connect to higher voltages.

Can I repair a faulty 50-CP4 myself?

If the board has visible damage like burnt components, replacement is recommended. For intermittent issues, check wiring and connections. Only attempt repair if you have electronics experience; otherwise, replace the board.

USER MANUAL 50-CP4 LiftMaster

INSTALLATION INSTRUCTIONS FOR CP-4 AUTOMATIC GATE OPENER

*Patent Pending

1. SERIAL NUMBER

There is a barcode serial number on the bottom of "puck" and on the product box. When calling to talk about your product, please have this number handy.

2. TRENCH PIPE & CABLE

- Trench 1/2" PVC pipe to placement of CP-4 - Smooth out entire length of cable before pulling thru PVC pipe - Gently pull cable thru PVC pipe (may need wire lubricant)

12'

80' - 100'

NOTE: Warranty void if cable not run in conduit

3. CONDUIT & SLIP JOINT

3D rendering of a black cylindrical mechanical component with a metallic rod inserted, labeled 'cantelli' (no other text or symbols visible)

After pulling cable through plastic conduit, insert conduit inside slip joint on "puck."

DO NOT GLUE (to un-install later, if needed).

4. CONNECT TO GATE

CP-4 works with all gate operators—powered or solar, single or dual free exit terminals.

DUAL EXIT TERMINAL SINGLE EXIT TERMINAL

VOLTAGE	CURRENT
8-24 VAC8-30 VDC	Standby: 30-70 μAAlarm: 40-60 mA

5. TEST SENSITIVITY

NOTE: IN MOST CASES DO NOT ADJUST SENSITIVITY OR REMOVE LID.

SENSITIVITY ADJUSTMENT

HIGH (Default)

Detects vehicle going

5 MPH 12-14' away

1 & 2 in OFF position

MEDIUM

Detects vehicle going

5 MPH 6-8' away

1 ON & 2 OFF position

LOW

Detects vehicle going

5 MPH 2-3' away

1 & 2 in ON position

Note: Dip switch color may vary

6. BURY CONDUIT & "PUCK"

Test unit with gate by swinging steel over puck (or driving vehicle by). If it opens the gate correctly, finish installation by burying conduit and puck 3-5" below surface.

OTHER INSTRUCTIONS

• CP-4 may be installed above ground by screwing "puck" directly to an immovable post or building
• If installed above ground, use conduit to mechanically protect cable (animals will eat)
• Car should be going at least 5 MPH at sensor to be detected

Install CP-4 at least:

• 6-10 feet away from buried power, telephone, or invisible dog fence
  • 10 feet away from natural gas lines
• 20 feet away from power pole with a transformer
  • 100 feet back from railroad traffic
• 200 feet away from high power substation power lines
• 80-100 feet back from gate operator

Technical Specifications
Power Required	8-24 VAC or 8-30 VDC
Stand-By Current	30-70 Microamps (μA)
Alarm Current	30-40 Milliamps (mA)
Relay Time	2-3 seconds
Relay Contacts	SPDT, floating, N.O. or N.C. (Form C)
Relay Contact Rating	1 amp/24 VDC(1 mA at 5 VDC min. load)
Enclosure Rating	IP67
Strength Rating	9.53 ton-force8646 kgf
Temperature Range	-25° F. - +140° F.-32° C. - 60° C.
Dimensions	4.5 in. dia. x 2.5 in. high
Weight	5 lbs. with 100 ft. cable

The CP-4 complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful

interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

RETURNING MERCHANDISE

CONSUMER: Contact your installer

INSTALLER: CALL BEFORE DIGGING UP

Call [phone], option 1 to troubleshoot and receive a Return Merchandise Authorization (R.M.A.) number. Write R.M.A. number on return shipping box and any correspondence included with defective product.

DISTRIBUTOR: Send installers directly to Cartell, using 717-532-0033, option 1 as phone number.

5 YEAR WARRANTY

All Cartell products are warranted against defects in material and workmanship for five years.

This warranty does not cover defects caused by, but not limited to: acts of God, improper installation, abuse, fire damage, electrical surges, integrated system failures, improper lid/gasket installation, and damage to cable (if applicable) caused by slicing, pulling, tangling, improper splicing or not running in non-metallic conduit.

CONTACT INFORMATION
TECH SUPPORT	717-532-0033, option 1
RMA's	717-532-0033, option 1
SHIPPING	717-532-0033, option 2
ACCOUNTING	717-532-0033, option 3
INSIDE SALES	717-532-0033, option 4
EMAIL	[e-mail]
ORDERING(Distributors only)	[e-mail]
ADDRESS	510 West King Street Shippensburg, PA 17257
WEBSITE	www.cartell.com

WARNING: This product can expose you to chemicals including Acrylonitrile, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

cartell®

[NO TEXT]