Troubleshooting - DoorKing 9150 Series Installation & Owner's Manual

8.2 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
terminals, motor capacitor and the motor.
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.
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.
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 4 and 18 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. If a three-button control station (open-close-stop) is connected to this gate operator, check for proper wiring. Only a
DoorKing three button control station (P/N 1200-006 or 007) can be used with this gate operator. Others will cause a
malfunction.
6. 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 20.
Every time the 9150 is powered up, the First open command will automatically run "Multiple
gate cycles" that will locate and remember the gate's open and close positions (See page 25).
Symptom
Operator will
not run. Power
LED is OFF.
Operator will
not run. Power
LED is ON.
42
• Check that AC 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 high voltage terminal. If voltage measures 0, check the incoming power wires
or replace the circuit board.
• If a photo-cell is used as a secondary entrapment prevention device, check to be sure that the beam
is not blocked.
• Be sure that the chain is not too tight. A too tight chain may cause the operator to stall.
• Bypass circuit board and Check Motor:
Turn power switch OFF and remove the circuit board. Place a jumper wire from the 117 VAC
SWITCHED terminal to the BLUE wire on the 8 pin POWER connector on the control board.
CAUTION – HIGH VOLTAGE. Turn the power switch on. The motor should run. Turn the power
switch OFF and remove the jumper.
With power still OFF, place a jumper wire from the 117 VAC SWITCHED terminal to the RED wire on
the 8 pin POWER connector on the control board. CAUTION – HIGH VOLTAGE. Turn the power
switch on. The motor should run in the opposite direction. Turn the power switch off and remove
the jumper.
• 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, motor resistors, wire
connections from the control board to the motor or a bad control board.
Possible Solution s
( )
9150-065-V-12-12