LM21XPBB Manual
Page 2
INTRODUCTION GENERAL DESCRIPTION The LiftMaster® LM21XPBB and LM21XPBBVB Release Device is provided when installed in accordance with factory specifications and used in conjunction with a ...WIRING Wiring Instructions 5 Wire Routing 6 Wiring Diagram 7 Connections of Initiating Devices and Accessories 8-9 Optional Connections 9-10 TESTING Test Procedures 11 TROUBLESHOOTING Operational Checklist 12 MAAVINETERNATNCISE SEMENT Maintenance Requirements 13 ATTENTION Enclosure Mounted LEDs Status Indicators 13 ACCESSORIES AND REPAIR PARTS 14 APPENDIX 15 WARNING Mechanical CAUTION...
INTRODUCTION GENERAL DESCRIPTION The LiftMaster® LM21XPBB and LM21XPBBVB Release Device is provided when installed in accordance with factory specifications and used in conjunction with a ...WIRING Wiring Instructions 5 Wire Routing 6 Wiring Diagram 7 Connections of Initiating Devices and Accessories 8-9 Optional Connections 9-10 TESTING Test Procedures 11 TROUBLESHOOTING Operational Checklist 12 MAAVINETERNATNCISE SEMENT Maintenance Requirements 13 ATTENTION Enclosure Mounted LEDs Status Indicators 13 ACCESSORIES AND REPAIR PARTS 14 APPENDIX 15 WARNING Mechanical CAUTION...
LM21XPBB Manual
Page 12
... the fire door or shutter is applied? voltage should not be any voltage on the circuit board located behind the terminal block (See Wiring Diagram). TROUBLESHOOTING OPERATIONAL CHECKLIST POWER Is the red LED, labeled "Power," located on the bottom of the enclosure lit?
... the fire door or shutter is applied? voltage should not be any voltage on the circuit board located behind the terminal block (See Wiring Diagram). TROUBLESHOOTING OPERATIONAL CHECKLIST POWER Is the red LED, labeled "Power," located on the bottom of the enclosure lit?