Troubleshooting - Chamberlain RJO20 Manual

Troubleshooting

Troubleshooting
The garage door opener doesn't operate from either the Door Control or the remote control:
• Does the garage door opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the
fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.)
• Have you disabled all door locks? Review installation instruction warnings on page 7.
• Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any
restriction.
• The garage door spring may be broken. Have it replaced (see page 3 for reference).
• If the yellow command LED does not turn on, reverse the wires connected to the RED and WHT terminals of
the control panel. Replace wire if necessary.
The yellow and red LEDs on the Door Control are blinking quickly:
• The control panel is charging, and may take up to 5 minutes to become operational.
My remote control will not activate the garage door:
• Verify the lock feature is not activated on the door control.
• Reprogram the remote control.
• If the remote control will still not activate the door check the diagnostic codes to ensure the garage door
opener is working properly.
The remote control has short range:
• Change the location of the remote control in your car.
• Some installations may have shorter range due to a metal door, foil backed insulation, or metal garage siding.
The door doesn't open completely:
• Check power door lock.
The door opens but won't close:
• Check that cable tension monitor is correctly installed. If a second cable tension monitor has been removed, follow
the instructions to relearn a single cable tension monitor.
• The safety reversing sensors must be connected and aligned correctly before the door opener will move in the down
direction. If you are able to close the door using constant pressure, verify the safety reversing sensors are properly
installed, aligned and free of any obstructions.
• If the garage door opener lights blink 10 times, check the safety reversing sensors.
• If the garage door opener lights don't blink and it is a new installation see Adjustment section. For an existing
installation, see below.
Repeat the safety reverse test after the adjustment is complete.
The door reverses for no apparent reason and garage door opener lights don't blink:
• Check cable tension monitor.
• Clear any ice or snow from the garage fl oor area where the door closes.
• Review Adjustment section.
Repeat safety reverse test after adjustments.
My door will not close and the light bulbs blink:
The cable tension monitor must be installed and working properly before the garage door opener will move in the down
direction.
• Verify the cable tension monitor is installed and working properly.
• The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the
down direction.
- Verify the safety reversing sensors are properly installed, aligned and free of any obstructions.
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