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APPLICATION REQUIREMENTS:

This modification is available to all LA400 North American gate
operators.

FUNCTION:

Allows existing LA400 control board in the field to be replaced or
upgraded with a new LA400 control board.

I N S T A L L A T I O N   I N S T R U C T I O N S

REMOVE EXISTING BOARD

1. Remove screws in each corner and open control box cover

(Figure 1).

2. Disconnect terminals leads to both batteries and the 24VAC or

solar input at the board.

3. Remove the coaxial cable going to the antenna at the board F 

connector (Figure 2).

4. Remove all quick connect terminals in use to the logic board

(Figure 2).

• Wiring terminals

• Motor connectors

• Alarms

• Reset terminals

NOTE:

Remember location of all wire connections for

reinstallation

.

5. Disconnect the earth ground wire from the board 

connector (J4).

6. Remove the screws (4) that fasten the control board to the

mounting bracket and remove the existing control board.

To prevent possible SERIOUS INJURY or DEATH from
electrocution or fire, disconnect power at the fuse box BEFORE

proceeding.

WARNING

CAUTION

WARNING

WARNING

Control Board

Replacement Kit 

Screws

Batteries

Mounting
Bracket

Cover

Logic Board

Figure 1

1

K001A6039

Summary of Contents for LiftMaster K001A6039

Page 1: ... going to the antenna at the board F connector Figure 2 4 Remove all quick connect terminals in use to the logic board Figure 2 Wiring terminals Motor connectors Alarms Reset terminals NOTE Remember location of all wire connections for reinstallation 5 Disconnect the earth ground wire from the board connector J4 6 Remove the screws 4 that fasten the control board to the mounting bracket and remove...

Page 2: ...onnect the earth ground wire to the board connector J4 5 Reconnect the coaxial cable to the board F connector B 6 Reconnect all quick connect terminals A to the logic board Wiring terminals Motor connectors Alarms Reset terminals NOTE The quick connect terminals blue connectors that have wires attached from the previous board can be reused 7 Clear electrical box of all debris and tools COMPLETE TH...

Page 3: ...1 Turn Bi Part switch to desired setting Set to Off for single gate applications 2 Press the LEARN LIMITS button 3 The SET OPEN LIMIT LED will blink 4 Use the Gate 1 buttons to move Gate 1 to the desired open position Repeat if Gate 2 is present using Gate 2 buttons 5 Press the LEARN LIMITS button to set the Open Limit for gate s 6 The SET OPEN LIMIT LED will turn off The SET CLOSE LIMIT LED will ...

Page 4: ...products COMPATIBLE REMOTES 315MHz Passport Remote Security Remotes CPT13 370LM CPT23 371LM CPT33 372LM Security Keypad 373LM 376LM 374LM R1 LEARN XMITTER 2 LiftMaster L1 R1 R2 Z1 K5 Ø14GPØ89ØE Ø14LGØ89ØE Ø14SKØ89ØE K6 K2 F3 10A 32V D1Ø P1 P2 J1 J19 S1 Q9 K1 Z12 MAGLOCK ALARM GATE 1 C C NC NO NO GRN WHT YEL BLU RED BRN SET OPEN LIMIT SET CLOSE LIMIT LEARN LIMITS DIAGNOSTIC GATE 1 SAVE MAGLOCK MODE...

Page 5: ...tton connection loose Check SBC and COM connections to ensure they are secure 3 STOP button connection loose Check STOP button connections STOP and COM to make sure they STOP LED is OFF are secure 4 Obstruction is blocking the photoelectric Check gate area to ensure photoelectric eyes are not blocked eyes in the direction of movement 5 The safety edge is damaged Check gate area to ensure safety ed...

Page 6: ...t If it is not replace contact with a constant contact switch 1 Bad loop sensor or loop detector Replace loop sensor or loop detector 2 Bad connection between loop sensor Check connections to make sure they are secure loop detector and the control board 1 Bad loop sensor or detector Replace loop sensor or loop detector 2 Bad connection between the loop Check connections to make sure they are secur...

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