LiftMaster Elite Serie Manuel D'installation page 40

SYMPTOM POSSIBLE CAUSES
Switched (SW) a. In limit setup mode
Accessory power
remaining on.
Accessories a. Normal behavior
connected to
Switch (SW)
Accessory power
not working
correctly, turning
off, or resetting.
Accessories a. Accessory power protector active
connected to
b. Defective control board
Accessory power
not working
correctly, turning
off, or resetting.
Quick Close not a. Quick Close setting incorrect
working correctly.
b. Interrupt loop detector
c. Defective Expansion board
Anti-Tailgating not a. Anti-Tail setting incorrect
working correctly.
b. Interrupt loop detector
c. Defective Expansion board
AUX Relay not a. AUX Relay setting incorrect
working correctly.
b. AUX Relay wiring incorrect
c. Defective Expansion board
TROUBLESHOOTING
SOLUTIONS
a. Learn the limits
a. Move accessory to accessory power "ON"
a. Disconnect all accessory powered devices and measure accessory power
voltage (should be 23 – 30 Vdc). If voltage is correct, connect
accessories one at a time, measuring accessory voltage after every new
connection.
b. Replace defective control board
a. Check that Quick Close setting is ON
b. Check operation of Interrupt Loop detector
c. Replace defective Expansion board
a. Check that Anti-Tail setting is ON
b. Check operation of Interrupt Loop detector
c. Replace defective Expansion board
a. Check AUX Relay switches settings
b. Check that wiring is connected to either N.O. and COM or to N.C. and
COM.
c. Set AUX Relay to another setting and test. Replace defective expansion
board.
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