User Manual

41
TROUBLESHOOTING & FREQUENTLY
ASKED QUESTIONS
The following is a list of common scenarios, questions and concerns relating to
system setup, battery charging and maintenance procedures. Please refer to these
as general guidelines. For assistance with your specific system setup, please
contact your Installer.
NOTE: specific gravity readings should be taken at full charge after the
batteries have cooled and are resting in a Float voltage charge for 1-2 hours.
• Specific Gravity readings when charge is complete and the bank is resting
in Float voltage vary significantly. (greater than .030)
• This may be caused by multiple parallel strings of batteries in a bank as this
often results in charge imbalance. It is not recommended that a battery bank
exceed 3 series strings of batteries connected in parallel.
• Charge voltage settings may be too low. Verify they meet Rolls-recommended
charging parameters for Flooded models.
• An increase in Absorption charge time may be necessary. Increase in 15 to 30
minute increments.
• Indicates there may be failing or dead cell(s) in the battery bank causing a
charge imbalance. Test individual battery voltage and specific gravity of each
cell to identify weak or failed cells.
• Specific gravity readings of all cells in the battery bank indicate low state of
charge while resting at Float voltage. Readings vary by cell, but not greater
than .020 between the cells.
• Charging voltages may be too low and/or Absorption time may need to be
increased. Usage (load) may have increased, resulting in increased depth
of discharge (DOD) and sulfation.
• Increase Bulk/Absorption/Boost Voltage in .2v to .4v volts increments.
• Increase Absorption Time by 15 to 30 minutes increments as necessary.
• Decrease DC load usage.
• Specific gravity readings are consistently higher than recommended while
resting at Float voltage. (Ex 1.300, 1.295, 1.295, 1.290, 1.300…)
• Decrease DC load usage.
• Charging voltages may be too high. End Amps value may not be properly
programmed to trigger Float charge. Absorption time may need to be reduced
to prevent overcharge. Usage (load) may have decreased, reducing depth of
discharge (DOD) and the time required to recharge, causing the batteries
to overcharge.