Rev C Doc 6001288 (01-20285) 20 of 39
PART 4
TROUBLESHOOTING AND MAINTENANCE
A. TROUBLESHOOTING
This section is designed to help you troubleshoot your unit(s) with a minimum of effort. Directly below are
some hints to help you test, then a list of problems in order of most severe to least. Next comes a quick-
reference list of faults and how to clear them, and then a list of faults and their causes.
Testing Control Board inputs: To test an input, connect the input terminal to the COMMON terminal
on the Control Board and verify that its LED turns on momentarily. Normally, the Close limit switch and
Maglock LEDs are on if the gate is fully closed, and the Open limit switch is on if the gate is fully open.
The Manual STOP LED is always on.
Low input AC voltage: The voltage across connector J1 pins 1 (black wire) and 3 (red wire) on the
Control Board must measure 100VAC to 130 VAC.
CAUTION HIGH VOLTAGE. Measure with care.
Fault Causes: Refer to the end of trouble shooting section.
1. OPERATOR IS DEAD
When the unit power switch is cycled, the 7-segment display does not sequentially spell out
“HELLO”.
1. The main circuit breaker is off.
2. The unit power switch is off.
3. The input power connector is not securely connected to the Control Board.
4. Low input AC voltage.
5. Bad Control Board.
2. OPERATOR DOES NOT RUN
When the unit power switch is cycled, the 7-segment display does sequentially spell out “HELLO”.
1. An input is continuously activated (stuck).
2. Both limit switches are stuck closed.
3. Wrong switch S1 setting.
4. Stalled motor.
MOTOR DOES NOT RUN
Motor is dead:
1. The resettable motor thermal overload switch has popped.
2. The interconnecting cable between the motor and the control board is disconnected.
3. Bad control board.
4. Bad motor.
Motor is stalled:
1. Frozen motor or gearbox.
2. V-belt is too tight.
3. Gate is too heavy.
