LiftMaster HCTDCU HCTDCU Installation Manual - Page 37

TROUBLESHOOTING CONTROL BOARD LEDS INPUT OFF POWER ON STATUS LEDS OFF state AC charger or Solar power available BATT OFF CHARGING ON Not charging Three stage battery charging TIMER OFF The timer is disabled ON The timer is enabled MEDIUM BLINK (1 The timer is running blink per second) FAST BLINK (2 blinks The timer is paused per second) FASTEST BLINK (8 The timer is canceled blinks per second) GATE/ DOOR MOVING OFF ON MEDIUM BLINK (1 blink per second) The gate/door is stopped The gate/door is opening or closing Operator is in E1 (single entrapment) FASTEST BLINK (8 The operator is in E2 (double blinks per second) entrapment) BATT LOW OFF No battery error ON Battery low BLINK (1 blink per Battery critically low second) ACC PWR OFF OVLD ON OFF state Accessory overload protector opened OPEN, CLOSE, & STOP INPUT FIRE DEPT INPUT EXIT SHADOW CLOSE EYES/ INTERRUPT CLOSE EDGE OPEN EYES/ EDGE LOCK INPUT LEDS OFF Input inactive ON Input active BLINK Input active on other operator OFF Input inactive ON Input active BLINK Input active on other operator OFF Input inactive ON Input active BLINK Input active on other operator OFF Input inactive ON Input active BLINK Input active on other operator OFF Input inactive ON Input active BLINK Input active on other operator OFF Input inactive ON Input active BLINK Input active on other operator OFF Input inactive ON Input active BLINK Input active on other operator OFF Maglock relay inactive ON Maglock relay active STATUS LEDS INPUT LEDS 37