Symptom: The gate is moving up and down without stopping.
Purpose: Try to isolate the malfunction point.
Step 1:
Take look at this I/O board and the pin assignment.
220V/110V
input pins
220V/110V out put pins:
First right pin: for Gate motor.
Second right pin: for rim motor.
12v control input pins:
First right pin: for rim motor.
Second right pin: for Gate motor.
Step 2:
Turn power on; leave the gate moving up and down.
Cross the black probe of meter to the 12v comm, and red probe to the pin 34.
A. If the DC voltage is fluctuating between 12v and 0v, which means the upstream circuit,
include gate micro switch and MB are good. And the I/O board is suspicious. Now, replace
the I/O board, or change the I/O channel. The channel 3, 4 are spare channels, they are
not used. If you don’t have spare I/O board, you can do channel change from 1, 2 to 3, 4.
B. If the DC voltage is a constant 12v or 0v, go to step 3.
Step 3:
Now, the DC voltage across pin 34 and comm. is a constant 12v or 0v. This means the
upstream circuit for sure is malfunctioning, but the downstream, the I/O board, remain
unknown.
Now we have to check the upstream circuit, include gate micro switch and MB.
With power on and gate moving up and down, Go the connector J26 on the main board
(please refer the last page of the user manual). Find the pin I6. This is the signal pin from the
gate micro switch.
If the DC voltage is fluctuating between 5v and 0v, go to Step 4.
If the DC voltage is constant 5v or 0v, go to Step 5.
Step 4
The DC voltage is fluctuating between 5v and 0v, which means the gate micro switch, is good,
and now, we have to replace the Main board. Problem solved? if not, go back to Step 2, and
check the I/O board again.
Step 5
The DC voltage is constant 5v or 0v, now the gate micro switch or the wiring, connection are
suspicious.
Now check the function of gate micro switch, the wiring, and bad connection. It would not take
long to find it out. Problem solved? if not, go back to Step 2, and check the I/O board again.
There are only 4 components involved this troubleshooting, so it’s quite straightforward. For
rim problem, follow the same procedure; keep this for your reference:
1. pin 33 on the I/O board is for rim motor control.
2. pin 5 of J31 is for rim motor control output from the main board.
3. pin I5 of J26 is the 5v signal input from the micro switch.
4. the gate micro switch is NC.
Jason