Samlex Solar SCC-30AB Mode D'emploi page 46

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TroubleshooTing
SyMPTOM 1. BATTERy IS NOT CHARGING
• Check the green LED indicator. The green CHARGING LED should be on if it is daytime.
• Check that the proper battery charging algorithm (program) has been selected by DIP
Switches 2, 3, 4 (Table 6.1).
• Check that all wire connections in the system are correct and tight. Check the polarity
(+ and –) of the connections.
• 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 declines 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 volts) 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
• First check the operating conditions to confirm that the voltage is higher than specifications.
• Check that the proper battery charging algorithm (program) has been selected by DIP
Switches 2, 3, 4 (Table 6.1).
• 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.
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