Controlled Products Systems Group 9050-080 - Manual (Page 38)

9050-065-M-3-11 36
7.2 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, momentarily jumper across terminals 8 and 12 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, page 19.
Symptom Possible Solution ( s )
• 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 terminal strip or
replace the circuit board.
• If a photo sensor is used as a secondary entrapment protection device, check to be sure that the
beam is not blocked.
• Momentarily jumper terminal 8 to terminal 12. 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.
• 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.
1. Place a jumper wire from terminal 3 to terminal 4. CAUTION – HIGH VOLTAGE. Turn the power
switch on. The motor should run. Turn the power switch OFF and remove the jumper.
2. Place a jumper wire from terminal 3 to terminal 5. 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.
Operator will
not run. Power
LED is OFF.
Operator will
not run. Power
LED is ON.
Every time the operator 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 22).