Chamberlain LA 400PKGU Installation Manual page 42

TROUBLESHOOTING CHART continued...
SYMPTOM
Maglock not working
correctly.
Solenoid lock not working
correctly.
Switched (SW) Accessory
power remaining on.
Accessories connected to
Switch (SW) Accessory
power not working correctly,
turning off, or resetting.
Accessories connected to
Accessory power not
working correctly, turning
off, or resetting.
Quick Close not working
correctly.
Anti-Tailgating not working
correctly.
AUX Relay not working
correctly.
TROUBLESHOOTING
POSSIBLE CAUSES
a) Maglock wired incorrectly
a) Solenoid wired incorrectly
a) In limit setup mode
a) Normal behavior
a) Accessory power protector active
b) Defective control board
a) Quick Close setting incorrect
b) Interrupt loop detector
c) Defective Expansion board
a) Anti-Tail setting incorrect
b) Interrupt loop detector
c) Defective Expansion board
a) AUX Relay setting incorrect
b) AUX Relay wiring incorrect
c) Defective Expansion board
SOLUTIONS
a) Check that Maglock is wired to N.C. and COM terminals. Check that
Maglock has power (do not power maglock from control board
accessory power terminals). If shorting lock's NO and COM wires
does not activate Maglock, then replace Maglock or Maglock wiring
(refer to Wiring Diagrams).
a) Check that Solenoid is wired to N.O. and COM terminals. Check that
Solenoid has power (do not power solenoid from control board
accessory power terminals). If shorting lock's NC and COM wires
does not activate Solenoid, then replace Solenoid lock or Solenoid
wiring (refer to Wiring Diagrams).
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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