Chamberlain RJO20 RJO20 Owner s Manual - English - Page 33
Troubleshooting, Diagnostic Chart
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Troubleshooting Diagnostic Chart Your garage door opener is programmed with selfdiagnostic capabilities. The diagnostic LED will flash a number of times, then pause, signifying it has found a potential issue. Consult Diagnostic Chart below. Installed Safety Reversing Sensor Installed Safety Reversing Sensor Diagnostic LED Garage Door Opener Safety Reversing Sensor 1 FLASH Safety reversing sensors wire open (broken or disconnected) OR 2 FLASHES Safety reversing sensors wire shorted or black/white wire reversed SYMPTOM: One or both of the Indicator lights on the safety sensors do not glow steady. • Safety reversing sensors are not installed, connected, or wires may be cut. Inspect sensor wires for a disconnected or cut wire. • There is a short or reversed wire for the safety reversing sensors. Inspect safety sensor wire at all staple and connection points, replace wire or correct as needed. 3 FLASHES Door control or wire shorted Installed Safety Reversing Sensor 4 FLASHES Safety reversing sensors slightly misaligned (dim or flashing LED) 5 FLASHES Motor RPM is not recognized 9 FLASHES Cable tension monitor reversal 10 FLASHES Limits and forces need reprogramming 11 FLASHES Limits and forces need reprogramming 12 FLASHES Attempting to compensate 13 FLASHES Attempting to compensate Installed Safety Reversing Sensor SYMPTOM: The door doesn't activate from the door control. • Inspect door control/wires for a short (staple in wire), replace as needed. • Disconnect wires at door control, touch wires together. If garage door opener activates, replace door control. • If garage door opener does not activate, disconnect door control wires from garage door opener. Momentarily short across red and white terminals with jumper wire. If garage door opener activates, replace door control wires. SYMPTOM: Sending indicator light glows steadily, receiving indicator light is dim or flashing. • Realign receiving sensor, clean lens and secure brackets. • Verify door track is firmly secured to wall and does not move. SYMPTOM: Door travels 2-3 inches and stops. • Reprogram limits and forces. See Adjustment section. • If the motor unit continues to travel 2-3 inches, check the travel module connection or replace the travel module. SYMPTOM: No movement, motor runs 2-3 seconds. • Reconnect the emergency release. • Motor may need to be replaced. SYMPTOM: Door stops and reverses while closing. • Check for possible door obstructions and remove. • Check that the cable tension monitor is properly connected to the opener. • Replace the cable tension monitor. SYMPTOM: Door stops while opening. • Reprogram limits and forces. See Adjustment section. SYMPTOM: Door stops and reverses while closing. • Reprogram limits and forces. See Adjustment section. SYMPTOM: Door stops and reverses while closing. • Garage door opener will try to compensate three times before turning to a 10 Flash. SYMPTOM: Door stops while opening. • Garage door opener will try to compensate three times before turning to a 11 Flash. 33