Chamberlain SL 1000-B3 - Manual (Page 33)

Rev E Doc 01-20201 30 of 33
H. TROUBLESHOOTING
Units work as stand-alone:
1.
Miswired or disonnected Master/Slave interconnect cable.
2. Improper Master/Slave switch S1 setting.
3. Bad Control board.
Units are not synchronized:
Improper Operator Pair setting. See programming step 02, Operator Type.
One gate braking to stop causes a fault in the other (moving) gate:
1.
Both units are wired to the same circuit breaker.
2. Undersized power wires.