Service manual
Latest products and information available at www.sealite.com
20
SL07, SLC310 & SLC410
Compact 3-5nm+ Solar Marine Lanterns
All Sealite boards are tted with two Indicator LED’s. These are positioned near the Flash Code Rotary 
Switches. Use the table below to help determine operational status.
Yellow LED Lantern Status Lantern Comment
OFF Normal OFF
Lantern is in Daylight and in Dusk till Dawn mode or in 
Standby Mode
Flashing 
ON 0.15 seconds
OFF 0.15 
seconds
Normal OFF
Light is activating and will turn on after detecting 30 
seconds of continuous darkness. 
Flashing
2 x quick ashes 
every 2 seconds 
(Heartbeat)
Normal ON
Lantern is in Normal operating condition. It is not 
connected to any GPS synchronisation.
Flashing 
ON 1.5 seconds
OFF 1.5 seconds
Normal ON
Normal operating condition. Lantern is synchronised to 
GPS-enabled lanterns.
Flashing
1 x quick ash
every 2 seconds 
Normal ON
Lantern is ‘re-syncing’ with GPS. 
The lantern re-sync’s with the GPS every 15 minutes.
Flashing
2 x quick 
ashes every 11 
seconds 
Normal ON Lantern is a Hard Wire Synchronisation Slave.
Red LED Lantern Status Lantern Comment
OFF Normal Normal Battery Voltage
Flashing once 
every 1.6 
seconds
Battery Voltage 
is 12 – 12.5V
Battery Voltage is between 12 – 12.5V
Flashing twice 
every 2 seconds
Battery Voltage 
is 11.5 – 12V
Battery Voltage is between 11.5 – 12V
Flashing 3 x 
times every 2 
seconds
Battery Voltage 
is 10.5 – 11.5V
Battery Voltage is between 10.5 – 11.5V
Flashing 4 x 
times every 2.5 
seconds
Battery Voltage 
is 10.0 – 10.5V
Battery Voltage is between 10.0 – 10.5V
Flashing 5 x 
times every 3 
seconds
Battery Voltage 
is less than 
10.0V
Battery Voltage is at less than 10.0V 
Fixed-on
Flat Battery 
(<10V) 
OFF
Flat Battery cut-off is now operational and the lantern 
will be off. Battery must receive charge (above 12V) and 
lantern must see daylight for at least 1 minute before 
resuming normal operation.
Flashing 
ON 1.5 seconds
OFF 1.5 seconds
Battery Voltage 
is above 13.5V
Battery Voltage is above 13.5V. this may indicate a 
problem with the solar regulator.










