Velleman K8012 Manual - Operation :
__________________________________________________________________________________________________________________________________________________________
11
Operation :
When a discharged battery is connected to the unit, it starts charging it with
the maximum current (0.3A for batteries <4Ah, 1A for batteries >4Ah), until
the battery voltage reaches 14.7V (7.35V for a 6V battery). Once this volt-
age is established, the charger adjusts the charge current, in order to keep
this voltage steady. At the end of the charging cycle, when the charge cur-
rent has dropped significantly, the output voltage is dropped to 13.6V (6.85V
for a 6V battery). This allows the battery to remain hooked-up to the
charger without any risk for an indefinite time. Should the battery discharge,
then the charge cycle will restart automatically.
Troubleshooting :
If you have successfully completed the above tests, there is not much that
can go wrong.
If the unit never leaves the ‘charge’ cycle, this could point to either a defec-
tive battery, a too low charge current setting, or a battery with a too large
capacity.
15. CONNECTION DIAGRAM
R1823A/B
ON/OFF
0.25A Slow
Fuse
L
N
AC POWER
9V
9V
AC
AC
+
-
ACCU
ACCU
-
+
K8012
25VA TRANSFORMER