DoorKing 6400 Manuals & Support

The DoorKing 6400 is a 24 VDC in-ground swing gate operator for residential gates. It sits in a box below the gate hinge, so nothing shows above ground.

It runs from a DoorKing 4302 control box, 115 VAC or solar, with battery backup. The 6400 is UL 325 Class I.

Identify your model

The 6400 is buried under the gate at the hinge post and drives the gate through a pivot. The control board is in the separate 4302 control box.

The manual lists gates up to 8 ft and 300 lb. The 6400 quick start lists gates up to 10 ft and 300 lb. Check the manual for the installation you have.

Key specs

Class UL 325 Class I
Gate Up to 8 ft and 300 lb (manual)
Motor 24 VDC, 3 A
Speed 90 degrees in about 18 seconds
Cycles 20 per hour on AC power
Control box DoorKing 4302, 115 VAC or solar

Manuals and documents

Installation Manual

Quick Start

Troubleshooting

The 6004, 6006 and 6400 run from a DoorKing 4302 control box. Most problems are found at the control box, not the arm.

Operator will not run, power LED off

  • Check that AC power is on and the batteries are charged.
  • Check for 24 VAC at control box terminals 19 and 20. If it is good, check the terminal strip or replace the board.

Operator will not run, power LED on

  • At least one monitored photo eye or edge must be connected in each entrapment area, with its UL 325 switch on.
  • Jumper terminals 1 and 2 for a moment. If the input LED does not light, replace the board.
  • Check the fuses.
  • Test each arm by jumping the battery terminals to the motor terminals of its connector, then swap the wires. It should run both ways.

Gate opens a short distance, then reverses

  • Check the reversing sensitivity.
  • Disconnect the arm and check that the gate swings freely.

Gate opens but will not close

  • Any input LED that stays on holds the gate open.
  • Check photo eyes, edges and loop detectors.
  • For automatic close, check that SW 1, switch 4 is ON.

Works on and off

  • Main terminal 3 supplies 250 mA at most. Add up the draw of everything powered from it.
  • Replace the batteries about every two years.

Alarm sounding or chirping

  • This is a hard shutdown. Unlock the control box with the key, check the gate area, then press RESET or turn power off and back on.

Gate runs in the wrong direction

  • The 6400 quick start is drawn for a gate opening clockwise. Check the direction switches in the 4302 manual for the other hand.

Common questions

A DoorKing 4302 control box, 115 VAC or solar. The board, batteries and power switch are in the box, not in the ground.

No. The manual lists gates up to 300 lb. For heavier swing gates look at an arm operator such as the 6100 or 6300.

Yes. The operator will not run until at least one monitored photo eye or edge is connected in each entrapment area. They are not included.

Replacement parts

Placa de circuito de repuesto Doorking 4302-010
Placa de circuito de repuesto Doorking 4302-010
Doorking
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Safety devices and accessories

DoorKing 8080-057 retro-reflective photo eye
Doorking 8080-057 Retro-Reflective Photoeye
Doorking
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DoorKing 1800-500 Smart Gate Controller
DoorKing 1800-500 Smart Gate Controller - view 2
Controlador de puerta inteligente Doorking 1800-500
Doorking
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