Chamberlain LiftMaster CSW24V Installation Manual page 41

TROUBLESHOOTING
FAULT POSSIBLE CAUSES
Gate stops during a) Check DIAGNOSTIC LEDs
travel and reverses
b) Inherent force obstruction detection
immediately.
c) xternal Entrapment Protection Device
E
activation
d) Control (Open, Close) becoming active
e) Vehicle loop detector active
f) Low battery voltage
Gate opens, but will a) Check DIAGNOSTIC LEDs
not close.
b) Open control active
c) Close Entrapment Protection Device active
d) Vehicle loop detector active
e) Loss of AC power with AC FAIL set to OPEN
f) Low battery with LOW BATT set to OPEN
g) Fire Dept input active
Gate closes, but will a) Check DIAGNOSTIC LEDs
not open.
b) Open Entrapment Protection Device active
c) Vehicle loop detector active
d) Low battery with LOW BATT option set to
CLOSE
Gate does not close a) Timer-to-Close not set
from Timer-to-Close.
b) Open control active
c) Close Entrapment Protection Device active
d) Vehicle loop detector active
e) Loss of AC power with AC FAIL set to OPEN
f) Low battery with LOW BATT option set to OPEN
g) Fire Dept input active
Vehicle Exit loop a) Check DIAGNOSTIC LEDs
activation does not
b) Exit vehicle detector setup incorrectly
cause gate to open.
c) Defective Exit loop detector or loop wire
d) Low battery with LOW BATT option set to
CLOSE
CLOSE EYES/ a) Check DIAGNOSTIC LEDs
Interrupt loop does
b) Vehicle detector setup incorrectly
not cause gate to
c) Defective vehicle loop detector or loop wire
stop and reverse.
Vehicle Shadow loop a) Check DIAGNOSTIC LEDs
does not keep gate
b) Vehicle detector setup incorrectly
at open limit.
c) Defective vehicle loop detector or loop wire
CORRECTIONS
a) Use Diagnostic code to identify issue
b) Check for obstruction in gate's path or travel. Disconnect arm from gate and move gate
manually. Gate must move easily and freely through its entire range, limit-to-limit.
Remove obstruction or repair gate as needed.
c) Check all Entrapment Protection Device inputs for an active sensor
d) Check all Open and Close inputs for an active input
e) Check all vehicle detector inputs for an active detector
f) Battery voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or
replace batteries
a) Use Diagnostic code to identify issue
b) Check all Open inputs for an active input
c) Check all Entrapment Protection Device inputs for an active sensor
d) Check all vehicle detector inputs for an active detector
e) Check AC power and AC Fail option setting
f) Battery voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or
replace batteries
g) Check Fire Dept input
a) Use Diagnostic code to identify issue
b) Check all Entrapment Protection Device inputs for an active sensor
c) Check all vehicle detector inputs for an active detector
d) Check if AC power is available. If no AC power, then running on batteries and battery
voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or replace
batteries
a) Check Timer-to-Close (TTC) setting
b) Check all Open inputs for an active input
c) Check all Entrapment Protection Device inputs for an active sensor
d) Check all vehicle detector inputs for an active detector
e) Check AC power and AC Fail option setting
f) Check if AC power is available. If no AC power, then running on batteries and battery
voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or replace
batteries.
g) Check Fire Dept input
a) Use Diagnostic code to identify issue.
b) Review Exit loop detector settings. Adjust settings as needed.
c) Check Exit loop wire. Replace defective Exit loop detector.
d) Check if AC power is available. If no AC power, then running on batteries and battery
voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or replace
batteries.
a) Use Diagnostic code to identify issue. Check Anti-Tail gate switch.
b) Review Interrupt loop detector settings. Adjust settings as needed
c) Check Interrupt loop wire. Replace defective Interrupt loop detector
a) Use Diagnostic code to identify issue
b) Review Shadow loop detector settings. Adjust settings as needed
c) Check Shadow loop wire. Replace defective Shadow loop detector
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TROUBLESHOOTING CHART