Troubleshooting
If the LED indicator does not light with a battery connected, or blinks the over-battery-voltage
error, or the controller does not charge, the internal fuse may be blown. Check the fuse inside
the GVB by removing the four screws on the bottom of the enclosure. If the fuse is blown,
replace it with a 10A fast-acting ATO or ATC fuse rated for the maximum battery voltage.
Automotive-style fuses are typically rated to 32V, and are suitable for the GVB-8-Pb-12V, GVB-
8-Pb-24V, and lithium models with a CV voltage up to 31V (i.e., GVB-8-Li-31.0V. For the GVB-8-
LED RUN/CHARGE INDICATION
Standby: The battery is connected properly and ready to charge
when solar panel power is available.
2 SEC. BETWEEN BLINKS
Charging (low current, input current less than ~3.5A):
FAST & SHORT BLINKS
Charging (high current, input current more than ~3.5A):
LONGER BLINKS
Charging (current limit): charging at current limit.
The GVB is overloaded and limiting input current. Check that the
solar panel rating is within the GVB’s input specifications.
LONG, THEN SHORT BLINKS
Battery Charged: The battery is in the absorption
or float charging stage.
SOLID LED
LED ERROR INDICATION
Overheat: The controller’s internal temperature is too high.
SETS OF 2 RED BLINKS.
Overload: The GVB has been overloaded.
This could be caused by changing the solar panel connections
while the controller is operating.
SETS OF 3 RED BLINKS.
Battery voltage too low: The controller cannot begin charging
due to low battery voltage. Charge the battery by some other
means before use.
SETS OF 4 RED BLINKS
Battery voltage too high: Check that the correct GVB has been
selected for the nominal system battery voltage. If the nominal
battery voltage is correct, check the functioning of other
chargers that may be connected to the system. This error can
also be caused by a disconnected battery or blown fuse.
SETS OF 5 RED BLINKS.
Internal Error: Contact your dealer for assistance.
2 LONG BLINKS, FOLLOWED BY ANY NUMBER
OF SHORT BLINKS.
The GVB has a MULTICOLOR LED
Status Indication:
Specifications:
The most common causes of blown fuses are:
charging. In this case, there may be other internal
damage to the controller.
Marine Grade: Yes Yes
Waterproof: NO NO (See Genasun Model GVB-WP) NO (See Genasun
Model GVB-WP)
Connection: 4-position terminal block for 10-30AWG wire
Weight: 6.5oz., 185g
Dimensions: 5.5x2.5x1.2”, 14x6.5x3.1cm
Warranty: 5 years
GVB-8-Pb-12V GVB-8-Pb-24V GVB-8-Pb-36V GVB-8-Pb-48V GVB-8-Li-**.*V
