Troubleshooting guide

System Busy

[ SYSTEM BUSY ] can mean that the panel is busy with other communication.

What to do: Reset the panel. Did the display clear?

If not, [ SYSTEM BUSY ] can also mean that the panel's micro-processor is 'locked-up'.

A few things to check:

* Make sure J16 is not shorted

* Make sure Green wire (terminal 9) is not shorted to Ground or any other wire.

If that doesn't clear the display, try this:

STEP 1: Check DC voltage across terminals 8 & 10. Check DC voltage across terminals 9 & 10.

If both measure at 5 VDC, reset the panel (J16) and check the voltages again.

STEP 2: If both voltages still measure at 5 VDC, remove panel ground and remove all wiring

from terminals 7, 8, 9 & 10.

STEP 3: Reset the panel (J16). Check data voltages.

• If both voltages still measure at 5 VDC, replace the panel.

• If voltages are correct now, begin replacing terminal 7, 8 9 & 10 wiring.

BE SURE TO CHECK DATA VOLTAGES AFTER EACH WIRE IS REPLACED.

By checking the voltages in this manner, you should be able to see when the voltage problem

occurs. When it does, the wire you just replaced is most likely to be the cause of the problem.

-NOTES-

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