LiftMaster LM21XP LM21XP Manual - Page 12

WARNING MAINTENANCE WARNING CAUTION MAINTENANCE REQUIREMENTS The release device has no scheduled maintenance requirements. The unit has been designed and tested for use in dry, indoor locations. Testing of the unit at least once every 90 days is recommended, but test intervals shall ultimately be subject to criteria established by the Authority Having Jurisdiction (AHJ). WARNING To avoid SERIOUS PERSONAL INJURY or DEATH from electrocution, disconnect ALL power BEFORE performing ANY maintenance. FIGURE 1 Mechanical Reset Plunger Front of Release Device End Link Bottom of Release Device Electronic Reset Button Test Button Red LED (Line Power Present) Yellow LED (Close Door Detection Release Disabled) ENCLOSURE MOUNTED LEDS STATUS INDICATORS LED Label LED Color Description Action Required Disable Yellow The Yellow LED will light when the door reaches the close limit and activates a proximity switch attached to terminal positions 7 and 8 on the release device. This configuration results in the device not releasing the fusible link assembly in alarm or power loss situations and should only be used when the fire door is kept in a constant closed position. If the LED does not light when the door reaches the close limit and activates the proximity switch, then check that the proximity switch has been activated and that the switch is set to normally open (N.O.). Check to make certain that the switch is attached to terminal positions 7 and 8 on the release device. Power Red If the Red LED is lit, then the line power is connected and If the LED does not light when power is applied, check switched "on." that power is connected as described in the installation manual electrical connections. 12