Service manual

4801-5159 Rev 01-2015 Technical Installation and Service Manual Page 25
16 Brake Relay Test
The gear motors on the RS-500/600 Series Doors have a Brake Rectifier which will activate the brake in the gear
motor to stop the unit when not in use. There is a relay (acting as a switch) on the PCB 154 board in the Door
Assembly of the Controller that will turn this brake on and off. This test procedure will allow you to test the relay to
see if it is failing or if the problem could be in the Brake Rectifier. First, test the Brake Relay on the PCB 154. The
connections are found at the bottom right corner of the board.
If the Brake Relay is at fault, the door will struggle to operate or could cause the drive board to trip. This situation
could create an Error code of EOF1 or ECF1 in the Controller Display.
To test the brake relay:
1. Remove Quick Connect connector from the PCB 154 Board.
2. The door must be operated in one direction while in Jog Mode. See Section 12.
3. While pressing the up or down arrow (while in Jog Mode), place a jumper across the connectors inside the
Quick Connect. The jumper will simulate relay switching. See Diagram 16A.
The Brake should release and allow the door to operate. If the door operates properly after performing this
step, replace the Door Assembly of the Controller.
4. If the door does not operate after performing Step 3:
1. Check the Brake Rectifier to see if it is performing correctly.
2. Confirm that the correct Brake Rectifier is installed for the specific supply voltage.