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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 LED's are on if the gate is fully closed, and Open limit switch and
Reclose Timer LED's are on if the gate is fully open. The Power ON and Manual STOP LED's
are always on.
Low input AC voltage: The voltage across connector J1 pins 1 (red wire) and 3 (white wire)
on the Control Board must measure 100VAC to 130VAC.
Fault Causes: Refer to the end of trouble shooting section.
1. OPERATOR IS DEAD
When the unit power switch is cycled, no LED turns on.
1. The main circuit breaker is off.
2. The unit power switch is off.
3. The input power connector is not connected securely 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, LED's blink simultaneously or turn on randomly:
1. Low input AC voltage.
2. The processor was installed improperly into Control Board by the installer.
3. Bad Control Board.
When the unit power switch is cycled, all LED's turn on and off (except Power On) at the
same time:
1. On Manual Input Terminal TB2, the STOP terminal is disconnected from the COMMON
terminal.
2. An input is continuously activated (Stuck).
3. Low input AC voltage.
4. Bad Control Board.
When the unit power switch is cycled, all LED's (except Power On) turn on at the same
time and off one after another with the bottom LED turning off first (normal power up).
1. An input is continuously activated (stuck).
2. Both limit switches are stuck closed.
3. Stalled motor.
Rev C
PART 4
CAUTION HIGH VOLTAGE. Measure with care.
Doc 6001287 (01-20284)
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