LiftMaster SW420 SW420 GL BOARD Manual - Page 24

CONTROL BOARD PROGRAMMING AND, FEATURES CONTINUED, On when Interrupt/Safety Loop activated

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ADJUSTMENT CONTROL BOARD PROGRAMMING AND FEATURES (CONTINUED) RELAY DRIVE TROUBLESHOOTING LEDS There are 5 troubleshooting LEDs on relay drives K1 through K5. These LEDs will be illuminated when the microcontroller relay drive is activated. LED LED NAME D6 Contactor A D5 Contactor B D4 SAM D3 Lock D2 Alarm DESCRIPTION On when Contactor A is activated On when Contactor B is activated On when SAM relay is activated On when Maglock relay is activated On when Alarm Relay is activated TROUBLESHOOTING LEDS There are 9 troubleshooting LEDs. LED D11 D13 D15 D17 (Green) D19 D21 D24 D29 D31 LED NAME Radio Shadow Hard Close Stop Soft Open Hard Open Interrupt (Safety) Loop Obstruction Open Obstruction Close DESCRIPTION On when Radio switch is activated On when Shadow Loop is activated On when Close switch is activated On when Stop switch is not activated On when Open switch is activated On when Open switch is activated On when Interrupt/Safety Loop activated On when Edge is activated or when Photo Eye beam is broken On when Edge is activated or when Photo Eye beam is broken 24

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24
LED
LED NAME
DESCRIPTION
RELAY DRIVE TROUBLESHOOTING LEDS
There are 5 troubleshooting LEDs on relay drives K1 through K5. These LEDs will be illuminated when the microcontroller relay drive is
activated.
D6
Contactor A
On when Contactor A is activated
D5
Contactor B
On when Contactor B is activated
D4
SAM
On when SAM relay is activated
D3
Lock
On when Maglock relay is activated
D2
Alarm
On when Alarm Relay is activated
TROUBLESHOOTING LEDS
There are 9 troubleshooting LEDs.
LED
LED NAME
DESCRIPTION
D11
Radio
On when Radio switch is activated
D13
Shadow
On when Shadow Loop is activated
D15
Hard Close
On when Close switch is activated
D17 (Green)
Stop
On when Stop switch is not activated
D19
Soft Open
On when Open switch is activated
D21
Hard Open
On when Open switch is activated
D24
Interrupt (Safety) Loop
On when Interrupt/Safety Loop activated
D29
Obstruction Open
On when Edge is activated or when Photo Eye
beam is broken
D31
Obstruction Close
On when Edge is activated or when Photo Eye
beam is broken
CONTROL BOARD PROGRAMMING AND
FEATURES (CONTINUED)
ADJUSTMENT