Specifications - Samlex Power SCC-30AB Manuel Du Propriétaire

SECTION 7 |
• Measure the PV array Open Circuit Voltage and confirm it is within normal
limits. If the voltage is low or zero, check the connections at the PV array itself.
Disconnect the PV array from the controller when working on the PV array.
• Check that the load is not drawing more energy than the PV array can provide.
• Check if there are excessive voltage drops between the controller and the
battery. This will cause undercharging of the battery.
• Check the condition of the battery. Determine if the Battery Voltage drops at night
with no load. If it is unable to maintain its voltage, the battery may be failing.
• Measure the PV Voltage and the Battery Voltage at the SCC-30AB terminals. If
the voltage at the terminals is the same (within a few tenths of V) the PV array is
charging the battery.
If the PV Voltage is close to the open Circuit Voltage of the panels and the
Battery Voltage
is low, the controller is not charging the batteries and may be damaged.
SYMPTOM 2. BATTERY VOLTAGE IS TOO HIGH
• The Status LED will be blinking Green at 5 blinks and the Battery Voltage will be
displayed on the LCD Display
• First check operating conditions to confirm that the voltage is higher than

specifications.

• Check that proper Battery Charging Algorithm (Program) has been selected by
DIP Switches 2, 3, 4.
• Check that all wire connections in the system are correct and tight.
• Disconnect the PV array and momentarily disconnect the lead from the Battery
Positive terminal BAT+. Reconnect the battery terminal and leave the PV array
disconnected. The Green charging light should not be lit. Measure the voltage
at the PV array terminals PV+ and PV- (with the array still disconnected). If the
Battery Voltage is measured at the PV array terminals PV+ and PV- , the controller
may be damaged.
• Disconnect the PV array. The Status LED will continue to blink Green and the
Battery Voltage will continue to be displayed.
• Check the Open Circuit Voltage of the PV array. It should match the specs for the
array and should be less than 50V.
• With the PV array disconnected, there should be no voltage reading on the PV+
and PV- terminals. If voltage on the PV+ and PV- terminals reads almost equal to
the Battery Voltage, the controller is defective.
Troubleshooting
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