Pro Charging Systems BOS12V2 User manual

Safety, Installation, and Operating Instructions
Instructions importantes concernant la sécurité
Manual for the Following Battery Optimization Systems (B.O.S.) Models:
BOS12V2, BOS12V3, BOS12V4, BOS8V6
041620 –70347
IMPORTANT NOTICE:
Please save and read these safety, operating, and installation instructions before installing or applying AC power to
your Pro Charging Systems (PCS) charger. Contact technical support at PCS with any product, installation, or
service questions (800.742.2740).

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Pro Charging Systems, LLC
LaVergne, TN 37086-3539
TABLE OF CONTENTS
Important Safety Instructions……………………………………………………. Pages 2-4
General Operation …………………………………………………………………Pages 5
Charging Indications………………………………………………………………. Page 6
Troubleshooting ……………………………………………………………………Page 6
LED Fault Code Indications.……………………………………………………. Page 7
Limited Warranty Information……………………………………………………. Page 7
Additional Products………………………………………………………………. Page 8
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS IMPORTANTES CONCERNANT LA SÉCURITÉ
SAVE THESE INSTRUCTIONS. This manual contains important safety and operating instructions for future
reference.
CONCERVER CES INSTRUCTIONS. CE MANUEL CONTIENT DES INSTRUCTIONS IMPORTANTES CONCERNANT LA
SÉCURITÉ ET LE FONCTIONNEMENT.
Understand and relate the Hazard Levels and Signal Words utilized in this manual with the following definitions:
This symbol means: Immediate hazards, which will result in severe personal injury or death.
This symbol means: Hazards or unsafe practices, which could result in severe personal injury or death.
This symbol means: Hazards or unsafe practices, which may result in minor personal injury, product or
property damage.
This symbol means BE ALERT! Your safety, or the safety of others, is involved!
PERSONAL SAFETY PRECAUTIONS
Always read all instructions before using your charger!
1. Wear complete eye protection and clothing protection. Avoid touching eyes while working near battery. Have
plenty of fresh water and soap nearby in case battery acid contacts skin, clothing, eyes, or other surfaces. If battery
acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye, immediately flood eye with
running cold water for at least 10 minutes and seek medical attention promptly.
2. Dress properly. Wear protective, electrically nonconductive clothes and nonskid footwear. Remove personal metal
items such as rings, bracelets, necklaces, and watches when working with a lead-acid battery. A lead-acid battery can

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produce a short-circuit current high enough to weld a ring or the like to metal, causing a severe burn. Wear restrictive
hair covering to contain long hair.
3. Avoid working alone. Be sure someone is within range of your voice or close enough to come to your aid when you
work near a lead-acid battery.
4. Stay alert. Watch what you are doing and use common sense. Do not operate any BOS when you are tired.
5. Keep children away. Children must never be allowed in the work area. Do not let them handle machines, tools,
battery chargers, BOS, or extension cords.
6. Keep work area clean. Cluttered areas invite injuries.
7. Observe work area conditions. NEVER smoke or allow a spark or flame in the vicinity of battery or engine. Don’t
expose to rain. Keep work area well lit.
8. Do not overreach. Always keep proper footing and balance. Do not reach over or across electrical cables or frames.
9. Avoid electrical shock. To reduce risk of electrical shock, unplug BOS from batteries before attempting any
maintenance or cleaning.
10. Store idle equipment. When not in use, store equipment in a dry location to inhibit rust. Always lock up tools and
equipment and keep out of reach of children.
11. Maintain BOS with care. Inspect periodically and, if it has received a sharp blow, been dropped, or otherwise
damaged in any way, have it repaired by an authorized technician. Do not disassemble BOS; contact PCS technical
support when service or repair is required (800.742.2740). Incorrect reassembly may result in risk of electrical shock
or fire.
12. Check for damaged parts. Before using any BOS, carefully check any part that appears damaged to determine that
it will operate properly and perform its intended function. Check for broken parts and any other condition that may
affect proper operation. Any part that is damaged should be properly repaired or replaced by a qualified technician.
Do not use the BOS if any part does not operate properly.
13. Replacement parts and accessories. When maintaining, only use accessories intended for use with this BOS.
Approved accessories are available from Pro Charging Systems (800.742.2740).

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SAVE THESE INSTRUCTIONS!
INSTALLATION AND PREPARATION
To reduce risk of battery explosion, follow these instructions, those published by the battery
manufacturer, and by the manufacturer of any equipment that you intend to use in the vicinity of
battery. Review all cautionary markings on these products and on the engine. Pour
réduire le risque d’explosion, lire ces instructions et celles qui figurent sur la batterie.
RISK OF EXPLOSIVE GASES: WORKING IN THE VICINITY OF A LEAD-ACID BATTERY IS
DANGEROUS. Batteries generate explosive gases during normal battery operation. For this reason, it is of utmost
importance that prior to each use of your BOS, you read this manual and follow the instructions exactly. Il est
dangereux de travailler a proximité d’une batterie au plomb. Les batteries produisent des gaz explosifs en service normal. Il
est aussi important de toujours relire les instructions avant d’utiliser le chargeur et de les suivre à la lettre.
Do not operate BOS in a closed-in area or restrict ventilation in any way.
Ne pas faire fonctionner le chargeur dans un espace close et/ou ne pas gener la ventilation.
Clean battery terminals. Be careful to keep corrosion from coming into contact with eyes.

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Connect the BOS’ cables as shown below depending on your model.

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APP OPERATION - screenshots:
GENERAL OPERATION
Be extra cautious to reduce risk of dropping a metal tool onto battery. It might cause a spark
or short-circuit a battery or other electrical part, possibly resulting in an explosion. If damaged,
contact PCS (800.742.2740).
NEVER charge a frozen battery.
Ne jamais charger une batterie gelée.
Assure that the area around your BOS and batteries is properly ventilated.
Risk of electrical shock! Do not touch uninsulated parts of the BOS output connector, battery
connector, or battery terminals.
Study all battery manufacturers’ specific precautions such as removing or not removing cell caps
while charging and recommended rates of charge.
Prendre connaissance des measures de précaution spécifiés par le fabricant de la batterie, p. ex., vérifier
s’il faut enlever les bouchons des cellules lors du chargement de la batterie, et les taux de chargement recommandés.
Never place the BOS directly above or below the battery being balanced; gases or fluids from
the battery will corrode and damage the BOS. Locate the BOS as far away from the battery as DC
cables permit.

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Ne jamais placer le chargeur directment sous la batterie à charger ou audessus de cette dernière. Les gaz ou les fluids qui
sèchappent de la batterie peuvent entrainer la corrosion du chargeur ou l’endommager. Placer le chargeur aussi loin de la
batterie qui les cables c.c. le permettent.
Never smoke or allow an open spark or flame in the vicinity of the BATTERY the battery or engine.
Ne jamais fumer près de la batterie ou du moteur et éviter toute étincelle ou flamme nue à proximité de ces dernie.
Working in the vicinity of a lead-acid battery is dangerous. Batteries generate explosive gases
during normal operation. For this reason, it is of the utmost importance that prior to each use of your BOS, you
read and follow the instructions provided exactly.
Il est dangereux de travailler a proximité d’une batterie au plomb. Les batteries produisent des gaz explosifs en service
normal. Il est aussi important de toujours relire les instructions avant d’utiliser le chargeur et de les suivre à la lettre.
BOS LEDs: Red/Green/Blue –as of 04/16/2020
RED:
-FLASHING
oIf flashing RED, the BOS is not properly connected to the batteries -OR-a fuse is blown -OR-dead battery
(<1.667V/cell)
▪Check voltage of each battery, check connections, and then check fuses
GREEN:
-SOLID
oIf solid GREEN, the BOS is actively balancing one of the batteries
BLUE
-FLASHING EVERY 5 SECONDS
o1 flash -OR-2 flashes every 5 seconds indicates voltage prediction algorithms are running and getting ready for
an active balance
-FLASHING EVERY 15 SECONDS
o1 flash every 15 seconds indicates either a low voltage battery in the pack (<1.750V/cell) -OR-a high voltage
(>2.333V/cell)
o2 flashes every 15 seconds indicates the batteries are predicted to be close to each and additional algorithms
are to be ran
-FLASHING EVERY 30 SECONDS
o1 flash every 30seconds indicates the batteries are balanced -OR- we see an over-temp
▪Unit will keep running prediction algorithms
▪If an over-temp, we will be able to see a fault in the app
FAULTS in app:
-FAULT 1: Check voltage of each battery
oOne of the batteries is above 2.333V/cell or lower than 1.750V/cell
oCould indicate large imbalance during a charge/discharge –check app for individual battery voltages
-FAULT 2: Overtemp
oUnit will run a quick cool down procedure and restart
-FAULT 3: LED FLASHING RED
oCheck battery connections, fuses, or dead battery (<1.667V/cell)

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LIMITED WARRANTY
Pro Charging Systems, LLC (PCS) makes this Limited Warranty only to the original retail purchaser.
PCS warrants this battery charger for two years (unless the charger is used in a Restricted Market) from the date of retail
purchase against defective materials and/or workmanship. Restricted markets include markets outside of the USA, Rental
applications and Heavy Industrial applications. Sometimes RM is designated in the PCS Part number when ordered, but is
not part of the model number. Chargers used in Restricted Markets will have a warranty period of 18 months from the date of
retail purchase against defective materials and/or workmanship. CR refers to “Certified Reconditioned” and designates a 1-
year warranty.
If such defects should occur, this unit will either be repaired or replaced at the discretion of the manufacturer. It is the
responsibility of the original purchaser to return the charger along with proof of purchase, transportation, and/or any mailing
or handling charges prepaid to the manufacturer or its authorized representative. Chargers that are purchased more than
two years beyond the date of production will automatically have a warranty start date that will be the two-year anniversary of
the production date.
This limited warranty is void if the product is misused, improperly maintained, handled carelessly or incorrectly operated.
Additionally, this warranty is void if the charger is disassembled, the charger’s charge cables are cut, the power cord is cut
off, the charger is altered without authorization from PCS, the serial number is removed, or repair is attempted by anyone
other than an authorized representative. PCS makes no other warranty other than this limited warranty and expressly
excludes any implied warranty, including warranty for any incidental or consequential damages. This is the only expressed
limited two-year warranty authorized by PCS and does not authorize anyone to assume or make any other obligation towards
the product other than this three-year Limited Warranty. Some states do not allow limitation of incidental or consequential
damages.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state. Please call
Pro Charging Systems, LLC for full warranty information and/or service please call (800.742.2740).
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions. (1) This device may
not cause harmful interference. (2) This device must accept any interference received, including interference that may cause
undesired operation.
Contains FCC ID: 2AB7YVDLC52
Below are some of our other options in chargers and battery accessories. Call our technical support group for more detailed
information or visit our web site www.dualpro.com.