Doorking 6500 User Manual download pdf (Page 34)

6500-065-K-7-08

6.2 Troubleshooting

Have a good VOM meter to check voltages and continuity. A Meg-Ohm meter capable of checking up to 500 meg-ohms of

resistance is necessary to properly check the integrity of the ground loops. When a malfunction occurs, isolate the problem to

one of three areas: 1) the operator, 2) the loop system, 3) the keying devices. Use caution when checking high voltage areas:

terminals 17 through 20, the motor capacitor and the motor.

Symptom Possible Solution(s)

• Check that power to the operator is turned ON.

• Transformer may be overheated. Turn power off and allow board to cool for several minutes then

retest. Check for low 115 VAC power and low voltage shorts.

• Check for 115 VAC at terminals 19 and 20. If voltage measures OK, check the terminal strip or

replace the circuit board.

Operator will not run.

Power LED is OFF.

• Push test button or momentarily jumper terminal 1 to terminal 2 (or 1 to 5). If the input LED does

not come ON, check the terminal strip or replace the circuit board. If LED does come ON, proceed

to next steps.

• Remove circuit board. With power ON, momentarily jumper terminal 19 to terminal 18 with a

14 AWG insulated jumper wire. CAUTION – HIGH VOLTAGE. The motor should run.

• With power ON, momentarily jumper terminal 19 to terminal 17 with a 14 AWG insulated

jumper wire. CAUTION – HIGH VOLTAGE. The motor should run in the opposite direction of

the above step.

• If the motor runs in both steps above, replace the control board. If the motor does not run,

or runs in only one direction, problem can be a bad motor, motor capacitor, wire connections

from the control board to the motor or a bad control board.

Operator will not run.

Power LED is ON.

1. Check the input indicator LEDs. They should only come ON when a keying device (card reader, push button, etc.) is

activated. If any of the input LEDs are ON continuously, this will cause the gate operator to hold open. Disconnect the

keying devices one at a time until the LED goes OFF.

2. Check any external secondary entrapment protection devices. Any short or malfunction in these devices can cause

the gate operator to stop or to hold open.

A malfunction in a loop or loop detector can cause the gate operator to hold open, or to not detect a vehicle when it is

present over the loop. The LEDs next to the loop detector ports on the operator circuit board will light only when the

loop has detected an object above it. If the LEDs stays on after the object has gone, then the loop detector has malfunc-

tioned. Pull the loop detector circuit boards from the loop ports on the operator circuit board. If the malfunction

persists, the problem is not with the loop system. For more information on trouble shooting loops and loop detectors,

refer to your loop detector instruction sheet and to the DoorKing Loop and Loop Detector Information Manual.

4. Check to be sure that there are no shorted or open control wires from the keying devices to the gate operator. If a

keying device fails to open the gate, momentarily jumper across terminals 1 and 2 (or 1 and 5) on the gate operator

circuit board. If the gate operator starts, this indicates that a problem exist with the keying device and is not with the

gate operator.

5. Check the high voltage supply. A voltage drop on the supply line (usually caused by using too small supply voltage

wires) will cause the operator to malfunction. Refer to the wire size chart in section 2.1.

• Check that SW-1, switch 6 is ON.

• Remove circuit board. Momentarily jumper terminal 19 to the primary/secondary connection

terminal block terminal 1, then to terminal 2 with a 14 AWG insulated jumper wire. CAUTION –

HIGH VOLTAGE. The secondary motor should run one way, then the other way as power is applied

to each terminal.

• If the secondary motor runs in both directions, replace the control board. If secondary motor does

not run, or runs in only one direction, problem can be in the wiring from the primary to secondary

operator, bad secondary motor or motor capacitor.

Secondary operator

motor will not run.

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Doorking 6500 User Manual Page 34

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