20TroubleshootingWARNING! Turn the main power to the operator off before performing any maintenance or repair operations.The manufacturer recommends that only qualified personnel check and maintain the equipment.If you have a problem installing the operator, checkthe problems and solutions listed below and refer tothe troubleshooting chart on the next page.Problem: The operator does not respond to theactivating signal.Solutions:Make sure the main power switch is on.Check the control panel terminal strip for possiblebroken or disconnected wires.If a radio signal is being used to activate the operator,be sure the code sets on both the transmitter andreceiver are the same.Momentarily short across terminals 1 and 2 on theMPS control panel, or terminals 1 and 4 or 2 and 4 onthe B/C control panel. If this activates the operator, aproblem probably exists in the activating device itself.Problem: The gate is closed and does not open.Solutions:Make sure the clutch adjustment is not too weak.Increase the torque if the motor is running and the gateis not moving. This may be necessary for especiallyheavy gates.Check that the closed limit switch is working. TheFCC status light (or Open LED) should be off. Makesure that the limit switch plate is not too far away fromthe limit switch. The distance between a plate and theswitch should be 3/16 in. (5 mm).Check fuse F1 and replace it if necessary.Problem: The motor is running in the wrongdirection.Solutions:Reverse the brown and black motor power leads on the844 B/C control panel.Problem: The gate opens, but will not close.Solutions:If there are no optional reversing devices connected tothe control panel, make sure a jumper is installedbetween terminals 4 and 5 on the MPS control panel or6 and 7 on the B/C control panel.If optional reversing devices have been installed,check them to see if they are working properly (anactivated reversing device will prevent the gate fromclosing). Temporarily short across the relevantterminals to bypass the reversing devices to see if thegate closes. If the gate closes, then the problem existswithin the reversing device(s).Problem: The gate opens and the operatorcontinues to run.Solutions:Check the FCC light (or Close LED) on the controlpanel. It should be off. If it is not, check the alignmentof the limit switch plate.If the FCC light is not off and the limit switch plate iscorrectly adjusted, then replace the limit switch.Note: If the limit switch plates are not detected bythe limit switch on an operator with the 844 B/Ccontrol panel, the operator will run forapproximately 240 seconds and then stop. For anoperator with the 844 MPS control panel, themotor will run for 120 seconds, and then thecontrol panel will be in alarm status.Upswung.com