6555-065-A-12-18
32
6.3 Troubleshooting
6.2 Built-In Diagnostic Tests
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
terminals, motor capacitor and the motor.
This gate operator is designed with built-in diagnostics that will alert you to potential or existing problems that the microproces-
sor has detected. Specific fault conditions are checked and the operator will signal that a fault exist through the built-in alarm.
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 entrapment protection devices. Any short or malfunction in these devices can cause the gate operator to
stop or to hold open.
3.
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. 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 located on DoorKing’s
web site.
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, press the Key Switch or momentarily jumper across terminals 1 and 4 on the 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 on page 15.
Constant alarm is heard when power is applied:
This indicates that the limit switch wire harness is not
connected to the circuit board. In this condition, the operator will not run and the tone will continue until the fault is
corrected. Check to be sure that the limit switch plug is properly inserted into the limit switch plug on the circuit
board.
Constant alarm is heard:
This indicates that the operator is in a hard shutdown condition (section 6.2 on page
32). The tone will continue to sound for five minutes, and then will beep once every five seconds. The operator-reset
button must be pressed or power must be removed and then reapplied to return the operator to normal operation.
Short “chirp” is heard every five seconds:
This indicates that the operator has been in a hard shutdown
condition in excess of five minutes. This will continue until the operator-reset button is pressed or until power is
removed from the operator (section 6.2 on page 32).
Operator runs for 1 second and stops, two short “chirps” are heard:
This indicates that there may be
a fault with the current sensor circuit.
