Troubleshooting Flow Charts
Connect wire #5 back to the terminal X1:35 on the connection board.
Refer to system wiring diagram.
Turn system power off. Check Anti-Two-Block signal in central unit with ohmmeter
measure between X1:34 and X1:35.
Anti-Two-Block switch closed = 4700 Ohms ±50 0Ohms
Anti-Two-Block switch open => 1 Megaohm.
Refer to system wiring diagram.
Faulty wiring between cable reel and central unit.
Check cable.
YES
Disconnect X1:34 and X1:35. Check main board function by installing a temporary
resistor, 4700 Ohms between X1-34 and X1-35 in central unit. With resistor connected
alarm should be inactive.
Refer to system wiring diagram.
Replace main board and reset pressure channel.
Refer to main board replacement procedure .
Reconnect Wire #6 to X1:34 and Wire #5 to X1:35
Refer to system wiring diagram.
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