LiftMaster GH GT- Logic 4 Installation Manual - Page 40

TROUBLESHOOTING RADIO FUNCTIONALITY The error codes will display at the radio LED. NOTE: Radio receiver is compatible with 315 MHz remotes. ERROR CODE DISPLAY SYMPTOM POSSIBLE PROBLEM CORRECTION R1 Quick Flash No response from the remote Unlearned remote - Try re-learning the A user tries to use a remote, remote (page 30). but the RADIO LED only flashes briefly and there is no response from the operator. R2 No LED activity No response from the remote Cannot recognize remote - Replace battery - OR - A weak signal caused by a eliminate interference - OR- discharged battery or outside obtain a qualified remote - OR- interference with the check antenna connections. remote(s) - OR - the remote(s) being learned is not compatible with the operator. Antenna not installed or damaged. R3 Radio LED turns The remote cannot be learned Cannot recognize remote - Replace battery - OR - off after 30 A weak signal caused by a eliminate interference - OR- seconds discharged battery or outside obtain a qualified remote - OR- interference interfering with the check antenna connections. learn process - OR - the remote(s) being learned is not compatible with the operator. Antenna not installed or damaged. R4 2 blinks The remote cannot be learned Receiver memory full - Erase all learned remotes A user enters RADIO function and re-learn the desired learning mode but there is no remote. space left to add another remote. R5 3 blinks The remote cannot be learned Duplicate remote - This remote already has a A user enters RADIO function function associated with it. To learning and selects the function change the function, erase all to be learned. When the remote learned remotes and button is pressed for learning, a re-learn the desired remote. search reveals that remote is already learned. R6 LMEP LED flashes Cannot close via constant pressure in No safety device present - Must connect a LiftMaster C2, D1 or E2 modes. A safety device is required to Monitored Entrapment close via constant pressure. Protection (LMEP) device. TROUBLESHOOTING 40 Troubleshooting radio functionality