Applies to EF300 EF600 Issue When attempting to boot an EF300 or EF600 with 120v lines the controllers do not fully power on and show OE L3 on the 7-segment display. When initializing the installation...Applies to EF300 EF600 Issue When attempting to boot an EF300 or EF600 with 120v lines the controllers do not fully power on and show OE L3 on the 7-segment display. When initializing the installation, you may encounter an issue where you cannot set the admin password.