SERVICE | Troubleshooting
Doc #OI0003 Part #004122 Rev19 2014
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AC Power Problems
If the power fluctuates, lights go bright or dim but don’t go out.
• Check the SP PRO front panel indicators and Performance data for information on the cause.
• The SP PRO output may be varying due to starting very heavy loads. Check the output voltage reading
(AC Load Voltage) via SP LINK.
If the power goes off for short periods (1 second to a few minutes)
• Check the SP PRO front panel indicators and Performance Data for information on the cause.
• The SP PRO may be in Power Save mode and the load is too small to detect. In this mode the SP PRO
pulses the output until a load is detected. Check the Econo Power Level in SP LINK.
• The SP PRO may be shutting down due to overload or low DC voltage and periodically attempting
restarts. If the SP PRO is shutting down switch off any heavy loads that may be causing the shut down.
If the power goes off for longer periods (10 minutes to many hours)
• Check the SP PRO front panel indicators and Performance Data for information on the cause.
• Check the Attention Required window in the Now tab in Data View section of SP LINK to see if a fault is
indicated and contact the supplier for further instructions.
Battery Problems
Batteries are very dangerous. Please read the safety information provided by the battery
supplier.
Battery does not charge properly
• Check that the battery charging requirements are correctly set up in the SP PRO.
• Check that the solar regulator is correctly set up.
• Check all cables and connections to the batteries.
If the solar does not appear to be doing much, the solar regulator may be set too low. Check indicators and
DC History in SP LINK.
If the battery is not operating correctly:
• Physically inspect the battery and check for loose connections. Monitor the battery voltage as heavy
loads supplied by the SP PRO are turned on and off.
• Check the voltage on each battery making up the battery bank to see if there are cells not fully charged
or not accepting charge. Measure voltages on each cell/battery at different times in the charge
discharge cycle. Just after charge has started say after 10 minutes, in mid charge, just before end of
charge, ten minutes after discharge starts, mid discharge and just before recharge starts.
Grid related Problems
GRID AVAILABLE BUT POWER IS LOST
• The likely cause is the SP PRO has disconnected from the grid due to high voltage or frequency, leaving the site
to operate from the limited battery storage. To resolve, widen the “Sync Tolerance” parameters or contact the
electricity supplier.
DC COUPLED SOLAR SYSTEM THAT DOESN’T ExPORT AS ExPECTED
• The likely cause is the Solar Controller (external device to the SP PRO) is restricting the flow of power from the PV
array. To resolve, make sure the Solar Controller float charging set point is ~ 1 V higher than the SP PRO Float
stage set point. and the charge stages are linked. See “DC couple Charge Controller Preparation” on page 34
