XCEL Q-SERIES User manual

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X/ AccuSense CHARGE SERIES
Charge algorithm controls BOTH voltage and current for precise charging
LED or LCD, Microprocessor Controlled Fully Automatic
Inhibit Lockout circuit (optional) prevents vehicle operation while charging
Temperature Compensation Circuit Adjusts Charge (with optional Cable)
SPECIFICATIONS:
Part Numbers: Q-SERIES PRODUCTS:
xQy-24F020Qzz 24Vdc 20Adc, High Frequency Design
xQy-36F014Qzz 36Vdc 14Adc, High Frequency Design
xQy-48F010Qzz 48Vdc 10Adc, High Frequency Design
R-SERIES PRODUCTS:
xRy-24F020Ezz 24Vdc 20Adc, SCR Line Frequency Design
xRy-36F018Ezz 36Vdc 18Adc, SCR Line Frequency Design
xRy-48F017Ezz 48Vdc 17Adc, SCR Line Frequency Design
xRy-64F014Ezz 64Vdc 14Adc, SCR Line Frequency Design
xRy-72F012Ezz 72Vdc 12Adc, SCR Line Frequency Design
Input Definition: x = 1: 120Vac, 50 and/or 60Hz
x = 2: 230Vac, 50 and/or 60Hz
y = A to D: A.C. Input Cord Type
Output Definition: zz = 00 to 99: Output DC Cord Type
For Input Cabling and Output Cabling options, contact distribution, OEM Supplier, DPI’s web site,
www.DPIpower.com and also refer to the section ‘Cables, Adaptors & Accessories’ for some of the
Cabling configuration options.
IMPORTANT: READ AND SAVE THIS SAFETY
INSTRUCTION MANUAL
KEEP IT WITH OR NEAR CHARGER AT ALL TIMES
Printed material may not represent the latest information available. Please visit our web-site
www.DPIpower.com for updates to this or other manuals.
Manual P/N: MNUL0038-A001 Rev.4
Copyright © 2017 DPI

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Table of Contents
Description Section Description Section
User Safety Operations Guide 1 Output Connector Circuit 11
Personal Precautions 2 Temperature Compensation Option 12
A.C. And Utility Requirements 3 Vehicle Lockout Control Option 13
Safe Grounding Instructions 4 AC Convenience Port Option 14
Assembly And Preparing to Charge 5 Q-Series Schematic, Kits, Mounting 15
Charging A Rechargeable Battery 6 R-Series Schematic, Kits, Mounting 16
Multi-Stage Charge –LED 7 Cables, Adaptors & Accessories 17
Multi-Stage Charge –LCD 8 Accusense Charge Suite App. 18
Error Code Description 9 Warranty 19
Troubleshoot / Technical Guide 10
Throughout this manual, look for this symbol. It means ‘BE ALERT –
YOUR SAFETY IS INVOLVED’. If you do not follow these safety
instructions, personal injury or property damage may occur.
1. USER SAFETY OPERATIONS GUIDE
WARNING –RISK OF EXPLOSIVE GASES.
WORKING WITH RECHARGEABLE BATTERY(s) IS DANGEROUS.
EXPLOSIVE GASES DEVELOP DURING NORMAL BATTERY OPERATION.
READ THIS MANUAL EACH TIME AND MAKE CERTAIN YOU FULLY
UNDERSTAND IT AND FOLLOW THE SAFETY AND OPERATING
INSTRUCTIONS AT ALL TIMES.
To reduce risk of battery explosion, follow all safety instructions below and
those published by the battery manufacturer. Review cautionary markings on
vehicle or equipment containing the battery.
Use of an attachment not recommended or sold by the battery charger
manufacturer may result in a risk of fire, electric shock or injury to persons.
Do not operate this charger if it has received a sharp blow, was dropped or
otherwise damaged in any manner. Refer to a qualified service agent.
Charger contains no serviceable parts. If it fails during its warranty period,
contact your dealer OEM Supplier or visit DPI’s website, www.DPIpower.com
for information concerning how to obtain a warranty replacement.
To reduce risk of electric shock, unplug charger from AC outlet before
attempting any maintenance or cleaning.
For external cleaning use a clean damp towel.
Have your distributor, dealer or other qualified service agent, repair or
replace worn or damaged parts immediately. Repairs should not be
attempted by people who are not qualified.
Whenever removing AC Plug from the receptacle, pull from the Plug Body;
not from the cord.
Do not operate the charger if it is malfunctioning. Personal injury or property
damage could result.

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2. Personal Precautions While Working With Batteries
Have someone within range of your voice to come to your aid if needed.
Have plenty of fresh water and soap nearby in case battery acid contacts
your skin, clothing or eyes. Wear eye and clothing protection and avoid
touching eyes.
If battery acid contacts skin or clothing, wash immediately with soap and
water.
If acid enters eye, immediately flush eye with running cold water for at
least 10 minutes. Get medical attention immediately.
NEVER smoke or allow a spark or flame in vicinity of battery.
Be extra cautious not to drop a metal tool onto battery. It might spark or
short circuit battery or other electrical part that may cause an explosion.
Remove personal metal items such as rings, necklaces, watches, etc.
Batteries can produce a short-circuit current high enough to weld such
items causing a severe burn.
NEVER charge a frozen battery. Thaw it out for safer and more efficient
charging.
WARNING: CHARGERS CAN IGNITE FLAMMABLE MATERIALS AND
VAPORS. DO NOT USE NEAR FUELS, GRAIN DUST, SOLVENTS, OR
OTHER FLAMMABLES. TO REDUCE THE RISK OF AN ELECTRIC SHOCK,
KEEP THE CHARGER DRY. DO NOT EXPOSE IT TO RAIN OR WATER.
3. A.C. AND UTILITY REQUIREMENTS
The use of an improper extension cord could result in a risk of a fire or
electric shock. If an extension cord must be used, it must be UL and/or
CSA approved. Locate all cords so that they will not be stepped on,
tripped over or otherwise subjected to damage or stress. Extension cord
must be properly wired and in good electrical condition, and large
enough for the AC rating of charger as specified in this TABLE:
RECOMMENDED MINIMUM AWG SIZE FOR
EXTENSION CORDS FOR BATTERY CHARGERS
Length of cord (feet): 25 50 100 150
AWG size of cord: 16 16 14 12
Refer to the Product ID Label affixed to the product and identify the input
requirements such as ‘120Vac, 60Hz, 10Amps’. Ensure that the product
will be connected to a matching utility power rating. For example; if
product is rated at 60Hz, do not connect to a 50Hz utility.
The rating of the input A.C. Cord, if replaced by a certified technician,
must not be less than 16Ga, 300V for 100Vac or 120Vac utilities and not
less than 18Ga, 300V for 230Vac or 240Vac utility power. Cord must be
hard usage SJT type or better, UL/CSA approved. The cable end
connecting to charger must be an approved IEC 60320 power connector.

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Do not connect product to AC receptacles that share power with any
other moderate to heavy loads such as air conditioners, motors and
other common appliances. Most appliances turn on/off at random and
cause power surges and power droops that can severely affect the
product connected to that same power circuit.
Inspect AC Receptacles for general wear, including loose or hanging
receptacles and be very aware of potentially worn contacts. If any heat is
felt in and around the receptacle while the charger is operating, this is an
immediate indication of danger caused by a worn receptacle.
4. SAFE GROUNDING INSTRUCTIONS
Do not remove Ground Pin from charger’s A.C. Plug, or connect to utility
power via an adaptor that bypasses the product’s ground pin connection.
The product must be grounded at all times when connected to utility
power.
This battery charger must be grounded to reduce the risk of electric
shock. This charger is equipped with an AC cord set having an
equipment-grounding conductor. This AC cord set must be connected to
an appropriate receptacle that is properly installed and grounded in
accordance with the National Electrical Code and all local codes and
ordinances.
WARNING:IMPROPER CONNECTION OF THE EQUIPMENT-GROUNDING
CONDUCTOR CAN RESULT IN A RISK OF AN ELECTRIC SHOCK.
The conductor with insulation having an outer surface that is green, with
or without yellow stripe(s), is the equipment-grounding conductor. If
repair or replacement of the charger’s AC cord set is necessary, refer to
aqualified service agent, and do not connect the equipment-grounding
connector to a live terminal.
5. ASSEMBLY AND PREPARING TO CHARGE
WARNING: The instructions printed on the charger are for daily reference.
For your own protection, when using ANY type of charger, always ensure that the
batteries in your Battery Pack ARE ALL at the same state of charge, same
condition, same size, and same rating. DO NOT MIX DIFFERING BATTERY
SIZES, BATTERY TYPES OR OLD BATTERIES WITH NEW. Never use
charger for any purpose contrary to its intended purpose of charging
rechargeable batteries in accordance with ALL instructions printed in this manual.
IMPORTANT: Attach Output DC Cable to Charger BEFORE
Connecting to Equipment or Vehicle. Insert Cable Connector into
Charger Output Connector and Rotate Lock until the Lock CLICKS
into position and the wings on the Rotate Lock line up with the Lock
Mark position on the front product Label.

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Be sure area around battery is well ventilated while battery is being charged. Gas
can be forcefully blown away using a non-metallic material like cardboard.
Inspect the receptacle found on the Equipment or Vehicle into which the charger
output cable connector is expected to mate into:
oThe receptacle must not be worn in any way. Also, carefully inspect
receptacle contacts for wearing, burn or pitting marks.
oThe receptacle contacts must be clean and free of any dirt, grime, grease,
liquids, or other contamination.
oHigh power currents flow across the contacts between Charger Plug and
Vehicle Receptacle and can be a source of high heat when mating contact
surfaces are worn or dirty. Replace receptacle or charger plug, or both when
worn. It is also highly suggested to periodically replace the plug and
receptacle every three years, but subjective to use, as is the case with all
plugs and receptacles on all appliances.
Inspect the Equipment or Vehicle Cabling periodically –(at least monthly), for
loose or worn wires, connectors, terminals and ensure that fuse safety devices
have been installed by the Equipment or Vehicle manufacturer. Start at the
receptacle and inspect each wire and joint connecting the battery, including inter-
battery connections.
Follow the wire connection from the Equipment or Vehicle’s receptacle down to
the first battery on both the positive and negative conductors. On one of those
conductors, an in-line fuse or a fuse-box fitted with a fusing protection device
must be installed –preferably within 6 inches (150mm) of the battery post on the
first battery. If fusing is not found, install fuse protection prior to using
charger with that equipment or vehicle.
If the OEM Equipment or Vehicle was not properly protected with fusing, as may
be the case with much older equipment or vehicles, DPI has made available a
‘Battery Terminal to Receptacle Wire/Circuit Fuse Protection Kit’, such as
KITS0009’ which is easy to install. Visit www.DPIpower.com.
The charger is factory preset to charge in MODE-1, unless supplied with an
OEM’s equipment or vehicle –in which case, the MODE will be set to that mode
defined by the OEM Equipment Specification. If changing battery type, verify and
re-establish the Charger MODE settings.
If charger was purchased ‘used’ or with used equipment –IDENTIFY BATTERY
INSTALLED IN THE EQUPMENT AND VERIFY THAT THE MODE IN WHICH
THE CHARGER IS SET, IS APPROPRIATELY SELECTED FOR THAT
BATTERY. This will ensure that an ‘inventory-stocked charger’at the Dealer’s
location was not mismatched with the battery installed on the equipment or
vehicle.

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The charger has 32 Charge Algorithm Modes available. Each mode is set to
charge a particular Battery Pack AND MUST BE SET CORRECTLY IN
ACCORDANCE WITH THE FOLLOWING TABLE:
‘CHARGE MODE SETTING TABLE’:
MODE –Switch Setting: 0 = Switch Up ( or left if vertically orientated )
1 = Switch Down ( or right if vertically orientated )
Switch Setting is numbered left to right or up/down ‘1’ to ‘5’
Mode Battery Name Type AH Range Absorption Switch Setting (Numbered)
Voltage* 1 2 3 4 5
01 Crown CR-225 Flooded 200-250AH 2.380V 0 0 0 0 0
02 Exide GC-135 Flooded 200-250AH 2.400V 0 0 0 0 1
03 JCI 6V-GC2 Energizer Flooded 210-260AH 2.450V 0 0 0 1 0
04 Trojan T105 Flooded 200-250AH 2.400V 0 0 0 1 1
05 Trojan T1275 Flooded 130-170AH 2.400V 0 0 1 0 0
06 Trojan L16G-AC Flooded 355-425AH 2.400V 0 0 1 0 1
07 USBattery US1800 Flooded 190-235AH 2.450V 0 0 1 1 0
08 USBattery US2200 Flooded 205-260AH 2.450V 0 0 1 1 1
09 Full River DC220-6 AGM 195-245AH 2.450V 0 1 0 0 0
10 Full River DC335-6 AGM 305-365AH 2.450V 0 1 0 0 1
11 GNB M83CHP06V27 AGM 170-220AH 2.330V 0 1 0 1 0
12 Trojan T105 Reliant AGM 210-230AH 2.450V 0 1 0 1 1
13 USBattery US2224 AGM 200-250AH 2.400V 0 1 1 0 0
14 Trojan 6V-GEL GEL 165-215AH 2.333V 0 1 1 0 1
15 PsZ-Cell –Lead Acid Flooded 075-125AH 2.400V 0 1 1 1 0
16 PsZ-Cell –Lead Acid Flooded 125-175AH 2.400V 0 1 1 1 1
17 PsZ-Cell –Lead Acid Flooded 200-250AH 2.400V 1 0 0 0 0
18 PsZ-Cell –Lead Acid Flooded 300-350AH 2.400V 1 0 0 0 1
19 PsZ-Cell –Lead Acid AGM 075-125AH 2.450V 1 0 0 1 0
20 PsZ-Cell –Lead Acid AGM 125-175AH 2.450V 1 0 0 1 1
21 PsZ-Cell –Lead Acid AGM 200-250AH 2.450V 1 0 1 0 0
22 PsZ-Cell –Lead Acid AGM 300-350AH 2.450V 1 0 1 0 1
23 General –GEL GEL 075-125AH 2.333V 1 0 1 1 0
24 Enersys 12XFC82 Pure Lead 075-125AH 2.450V 1 0 1 1 1
25 General –Pure Lead Pure Lead 200-250AH 2.433V 1 1 0 0 0
26 General –Pure Lead Pure Lead 300-375AH 2.433V 1 1 0 0 1
27 Optima OPT-D31M Spiral 050-100AH 2.450V 1 1 0 1 0
28 General –Spiral Lead Spiral 130-170AH 2.450V 1 1 0 1 1
29 Sony LiFePO4 Cell Li+ 055-065AH 4.172V 1 1 1 0 0
30 Sony LiFePO4 Cell Li+ 190-210AH 4.172V 1 1 1 0 1
31 BMZ LiFePO4 Cell Li+ 160-175AH 4.175V 1 1 1 1 0
32 Empty/User Configured User N/A 1 1 1 1 1
*NOTE: The Absorption Value is listed as Volts Per Cell and is one of the most important
parameters pertaining to that charge algorithm. Different battery packs have differing
number of cells –multiply the number of cells times the ‘Volts-Per-Cell’value to obtain the
voltage the charger will regulate during the Absorption Charge Stage. For example; using
MODE-2 ‘Absorption Voltage value of 2.400V/cell’ from the table above:
12V Battery Pack = 6 Cells Absorption = 14.40Vdc
24V Battery Pack = 12 Cells Absorption = 28.80Vdc
36V Battery Pack = 18 Cells Absorption = 43.20Vdc
48V Battery Pack = 24 Cells Absorption = 57.60Vdc
72V Battery Pack = 36 Cells Absorption = 86.40Vdc
For Lithium Battery MODES and using MODE-31 as the example:
12V Battery Pack = 3 Cells Absorption = 12.52Vdc
24V Battery Pack = 7 Cells Absorption = 29.22Vdc
36V Battery Pack = 11 Cells Absorption = 45.92Vdc
48V Battery Pack = 14 Cells Absorption = 58.44Vdc
72V Battery Pack = 21 Cells Absorption = 87.66Vdc

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Many rechargeable batteries share an exact or very similar profile to one of the
battery types listed above. Contact Factory to ask for MODE setting for a battery
type not listed, or visit www.DPIpower.com and download DPI’s document: ‘DPI
Battery MODE Setting Algorithm Match-Up’.
6. CHARGING A RECHARGEABLE BATTERY
An LED Display is assumed to be used. For products using an LCD (Liquid
Crystal Display) Display, the information below is displayed in readable format –
refer to the section titled ‘LCD Display Menu Formats’ for a complete description
of how the LED information is translated and displayed on the LCD.
For 4 consecutive seconds, upon connection to AC Power, the Front Panel LEDs
will flash a pattern to annunciate the mode setting as Described in the following
table where ‘0’ = Off, and ‘1’ indicates LED Flashing:
‘LED CHARGE MODE INDICATOR TABLE’:
MODE LEDs Left to Right MODE LEDs Left to Right
SET 1 2 3 4 5 SET 1 2 3 4 5
01 0 0 0 0 1 17 1 0 0 0 1
02 0 0 0 1 0 18 1 0 0 1 0
03 0 0 0 1 1 19 1 0 0 1 1
04 0 0 1 0 0 20 1 0 1 0 0
05 0 0 1 0 1 21 1 0 1 0 1
06 0 0 1 1 0 22 1 0 1 1 0
07 0 0 1 1 1 23 1 0 1 1 1
08 0 1 0 0 0 24 1 1 0 0 0
09 0 1 0 0 1 25 1 1 0 0 1
10 0 1 0 1 0 26 1 1 0 1 0
11 0 1 0 1 1 27 1 1 0 1 1
12 0 1 1 0 0 28 1 1 1 0 0
13 0 1 1 0 1 29 1 1 1 0 1
14 0 1 1 1 0 30 1 1 1 1 0
15 0 1 1 1 1 31 1 1 1 1 1
16 1 0 0 0 0 32 1 1 1 1 1 (Fast-Flash)
Note: For Vertical oriented LED Display, ‘Left’ is equivalent to ‘Bottom’ LED
MODE-31 is empty –selection of an empty MODE will produce an Empty Mode Error. A
Slow Flash rate is used to annunciate Modes 1 to 31. Mode-32 uses a Fast-Flash rate.
NOTE: If the charger has been subjected to Field Reprogramming by the user, during
the first time charger is used, startup time can take up to 10 minutes. The LEDs
will not flash and the charger will appear to be ‘frozen’. Do not unplug charger
because it is rebuilding its internal Database –refer to the section titled
‘Accusense Charge Suite Application’ for further details.
Multi-Stage Charge Algorithms
oThere are up to 8 charging Stages! Depending on the MODE selected, these
stages are already preset and implementation of each stage will vary from
one MODE to the next, dependent on the type of battery intended to be
charged. These charge stages ‘typically’include:

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oPRE-QUALIFICATION-TEST Charge Stage:
Tests battery for sulphation by applying a low level charge current and
analyzes voltage and current values and rates of change to determine if
the battery is ready to transition to the next high power Bulk Charge
Stage.
If a Battery Temperature Cable is installed, then minimum and
maximum temperature automatically become part of the analysis.
oBULK Charge Stage (also known as ‘Constant-Current’):
High Power charge, charges at a constant current or constant power
rate to deliver the ‘bulk’ of the charge needed
Some algorithms employ a 2-step Bulk Charge rate where a timed 10 to
30 minute period of a higher current may be measured. This two-step
process helps to break down sulphates quicker.
Upon completion of this stage, approximately 80% of total charge is
delivered to the battery
oABSORPTION Charge Stage (also known as ‘Constant-Voltage’):
Charger charges at a constant voltage level to provide adequate time
for the battery plates to ‘absorb’ the energy delivered.
Charge Amperage decreases as the energy is being absorbed into the
plates.
Termination of this stage occurs when the charge current has
decreased down to a targeted value which is dependent on many
factors such as size, type, age, and chemistry of battery.
Upon completion of this stage, approximately 95% of total charge is
delivered to the battery
oTOP-OFF Charge Stage (also known as ‘Finish’):
Charger charges at either a constant voltage, or constant current, or a
combination of constant-current / constant voltage to ‘Top-Off’ the
charge in a battery.
This stage employs timing based on ‘timers’ measured and recorded
during previous charge stages, in combination with dv/dt and/or di/dt,
and/or dT/dt, and/or, maximum voltage and temperatures (if Battery
Temperature Sensor installed), to terminate.
Variations in this charge stage are highly dependent on the battery
Charge MODE selected. Flooded Lead Acid batteries are typically
aggressively charged to high voltage levels to force internal gassing
which helps to mix the electrolyte. AGM (Absorbed Glass Mat) batteries
differ in that this stage limits upper voltage regulation levels which helps
prevent drying out the Absorbed Glass Mat.
Upon completion of this stage, approximately 100% of total charge is
delivered to the battery
oEQUALIZATION Charge Stage:
As batteries in a battery pack charge and discharge over many cycles,
cells may become unbalanced. Cell unbalancing becomes more
common as batteries age.

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Charger charges at either a constant voltage, or constant current, or a
combination of constant-current / constant voltage to ‘Equalize’ Battery
Cells in the battery.
This stage employs Timers in combination with dv/dt and/or di/dt, and/or
dT/dt, and/or, maximum voltage and temperatures (if Battery
Temperature Sensor installed), to terminate.
Even if this stage is activated in a charge MODE, it is not applied during
every charge cycle. For lithium and GEL batteries, Equalization is not
applied and cannot be manually selected.
Manual (intentional) selection of this charge stage, by the user, can be
selected by depressing and holding depressed the ‘Menu Select Button’
for 10 seconds WHILE A.C. Power is applied. If the Menu Select Button
is again depressed and held depressed for 10 seconds, this stage will
toggle off.
The charge cycle, in which this additional Equalization Charge Stage
will inject itself into, will be announced by either flashing the Red Power-
On LED or flashing the LCD Backlight, continually throughout the
ENTIRE charge cycle. The flash will stop upon entry into the
Float/Maintenance Standby Stage
oFLOAT/MAINTENANCE STANDBY Charge Stage:
The entry into this stage typically signifies that the battery is FULLY
charged and has a Green LED ‘Charged’ indicator associated with it. On
an LCD display, the status will display as ‘FLT’.
No further charging action occurs. However, all batteries, regardless of
chemistry, self-discharge at a rate that is proportional to ambient
temperature meaning that if a battery sits on a table completely
disconnected from all loads, it will self discharge over many months.
This charge stage, depending on the MODE selected will either:
Regulate at a low voltage level to supply a ‘trickle current’ to
‘MAINTAIN’ battery at full charge (prevent self discharge), or
Disconnect itself from A.C. Power by disabling the internal relay,
and allow the battery voltage to ‘FLOAT’ for 45 days, at which time,
the charger will automatically re-initiate, an new charge cycle and
automatically reconnect to A.C. Power, or
Re-start charging if the battery voltage decays below a trigger
voltage level
If the charger is fitted with an internal A.C. Connect/Disconnect relay,
typically, the output is allowed to ‘FLOAT’ and not regulated, which
prevents the consumption of utility provided power.
During this stage, regardless of the use of an A.C. Relay, the
microprocessor continues to monitor the battery and passage of time
while in this ‘STANDBY’ stage.
The charger may be left connected to battery with the A.C. Power
Removed. The amount of drain from the battery is very minimal.
Common Traits Applied to All Charge Stages:
Each Charge Stage employs the use of a ‘Safety Timer’ to time out and
end that stage if the stage process took too long without achieving the
desired targeted results.
Upon Safety Timer time out, a decision is automatically established to
transition to the next stage, or advance immediately to the final stage –

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Float/Maintenance Standby Stage, or terminate charge and display an
Error Code.
Each Charge Stage employs dv/dt and/or di/dt and/or dT/dt signal
analysis to monitor the progress of charging and factors into the
termination of the stage.
If a Battery Temperature Sensor Cable is installed, the charger
automatically detects its presence and will use it to adjust voltage and
current charge rates during the deployment of the charge algorithm. For
example, if charging in a cold temperature climate, the charger will
increase the voltage level targets to compensate for the temperature. If
the climate is hot, the regulation targets decrease automatically –this is
also known as ‘Temperature Compensation’ and is typically adjusted to
-2mV to -6 mV / cell / oC.
Some Stages may not be applied. For example, Lithium Based Battery
packs employ the use of Battery Management Systems and will not
work if a Pre-Qualification-Test Stage is used. Therefore, when
selecting a Lithium Charge Stage, Pre-Qualification Test Stage is
automatically not employed.
7. MULTI-STAGE CHARGE (TYPICAL) WITH LED DISPLAY
Under normal charge circumstances, the LEDs and Menu Switch operate as follows:
Power On (Red) Illuminates continuously when AC power present. Refer to
the section ‘TROUBLESHOOTING’ if FLASHING, but not
when flashing during a Charge Cycle that includes
Equalization Charge Stage.
Shutdown (Red) Illuminates typically when used only during Error Decode
Mode. Refer to ‘TROUBLESHOOTING’ if FLASHING.
Detection (Red) Illuminates when battery not connected (but, while powered
from A.C.), or for a brief period immediately following an A.C.
Connection. Refer to ‘TROUBLESHOOTING’ if FLASHING.
Charging (Yellow) Charge Status Indicator –FLASHES or illuminates during
the Multi-Stage Charge Process.
Charged (Green) Illuminates during the Top-Off Stage and Float/Maintenance
Stages of the Multi-Stage Charge Process. When
FLASHING in conjunction with a continuously illuminated
Power On Red LED it is signifying an ALERT. Refer to the
section titled Error Code Description for ALERT definitions.
Menu Select Button Depressing and holding depressed, this button for 10
seconds at power up, forces charger to insert the
Equalization Stage into the charge algorithm regiment IF and
only IF, that charge MODE selected, would allow it. After
power up, and if switch is again held depressed for 10
seconds, the Equalization Charge Stage is toggled to OFF
(de-asserted from the charge algorithm Regiment).
The following description assumes the charger is set in MODE-1 to charge a
typical Flooded Lead Acid Battery.

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MODE-1 is annunciated for 4-seconds after A.C. Power applied, where the Right
Most LED flashes. Refer to the LED CHARGE MODE INDICATOR TABLE’ and
CHARGE MODE SETTING TABLE.
o‘Power On’ LED and Detection LED will illuminate to indicate that AC power
is applied AND battery is in the process of being detected.
oIf the Red ‘Power On’ LED Flashes, it is indicating that the pending Charge
Cycle will apply a special charge called ‘Equalization Charge’. Refer to
Equalization Charge Cycle section for description of stage.
STAGE ONE –PRE-QUALIFICATION TEST
oYellow (Charging) LED flashes slowly (once per second) to test battery.
Charging stops if faults such as connection of 24v charger to a 36V battery
pack or safety timers timed out, etc. Refer to ‘Troubleshooting Guide’ if an
Error Code was displayed.
oDuration of this stage is dependent on condition of battery –approximately
10 seconds under average circumstances, but if your battery pack was
allowed to severely discharge to less than 1.75Vdc per cell (example –21v
for a 24v battery), then the charger may take several hours of slow charging
to try to slowly bring the battery up to above 1.75Vdc per cell.
STAGE TWO –BULK CHARGE (Constant Current)
oYellow (Charging) LED illuminates continuously indicating charging at full
rated output. While charging, voltage is monitored for the occurrence of the
next charging stage.
STAGE THREE –ABSORPTION CHARGE (Constant Voltage)
oYellow (Charging) LED illuminated continuously. The charger now regulates
at Absorption Voltage Level while monitoring charge current.
oOnce Charge Current has decreased to a sufficiently low level, this stage
exits to the next stage.
oThe Battery Pack has achieved approximately 95% State of Charge.
STAGE FOUR –TOP OFF CHARGE STAGE
oBoth Green (Charged) and Yellow (Charging) LEDs illuminate.
oReplenishing last 5-10% of battery capacity. Charging at a low Constant
Current rate, this stage monitors for time and dv/dt to terminate.
oThe Battery Pack has achieved approximately 95% State of Charge.
oNOTE: If using a Charger MODE set to charge a Flooded USBattery only,
this stage may take up to 4 hours to complete.
STAGE FIVE –EQUALIZATION CHARGE CYCLE
oThis is a special charge condition that is selectively applied and is not
typically applied to every battery, nor with every charge cycle. If it is applied,
the next stage becomes Stage Six. If not applied, then the next stage
becomes Stage Five.
oThe Red ‘Power-On’ LED will flash during the entire cycle in which
Equalization Charge Stage has been invoked, and the flashing will cease
when charge has completed.

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oEqualization Charge is an additional charge stage injected here and is
invoked via the following methods:
A MODE containing a flooded USBattery battery, such as battery type
US1800, and
Every 15th charge cycle is started, and/or
If the A.C. Cord is plugged/unplugged 15 times, and/or
The ‘Menu Select’ Button is held depressed for 10seconds when A.C.
power is applied
oWhile in this specific Charge Stage, the Yellow/Green LEDs will flash
alternately.
oThis Charge Stage locks in for a period of 2hrs to 4hrs and can terminate at
any time after the minimum 2hr period when a series of dv/dt measurement
records have been satisfied.
STAGE FIVE or SIX –FLOAT/MAINTENANCE (STANDBY)
oGreen (Charged) LED illuminates. Battery is fully charged and no further
‘charging’action is occurring. Charger is now in standby and monitoring the
battery and passage of time. Charger may now also be left connected to
battery, indefinitely.
oIf the Green LED flashes, it is signaling an abrupt change in the previous
charge cycle (but not an error) and may require additional attention
according to the flash rate:
Slow Flash: Charge cycle ended via peak voltage detection in the Top-
Off Charge stage.
Medium Flash: Charge cycle ended via peak voltage detection in the
Equalization Charge Stage.
Fast Flash: Charge cycle ended via Maximum Safety Timer time-out.
Modified Flash Pattern –Flash-Flash-Flash-OFF: When the Battery
Temperature Cable is connected and a maximum battery temperature
was reached, charging was terminated early.
oIf any of these flashing patterns occurred, check all of the equipment or
vehicle’s inter-wire connections from receptacle to batteries, including inter-
battery wiring for loose and/or dirty or worn or burned connections. Also,
check each battery for possible replacement of that battery and battery pack.
STAGE SIX or SEVEN –RECYCLE CHARGE STAGE
oWhile in Standby Mode (Stage-5 or 6: Float/Maintenance) and if a
substantial load were to be applied, charger will reset; thereby, automatically
initiating a new charge cycle routine and restoring battery to full capacity.
oIf while charging, the charger finds an abnormal charge condition, it will
attempt to shut down and indicate the ‘Condition’ by flashing any one of the
LEDs. Refer to the ‘Troubleshooting’ section for a description of the Charge
Error Condition.

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8. MULTI-STAGE CHARGE (TYPICAL) WITH LCD DISPLAY
Use of an LCD Display, does not affect nor alter the charge process in any way.
It only converts messages from what is otherwise a blinking LED into readable
characters. Therefore, refer to the previous section for a description of a typical
charge stage and reference the displayed LCD messages, below.
Menu Select Button:
oDepressing and holding depressed this button for 10 seconds at power up,
forces charger to insert the Equalization Stage into the charge algorithm
regiment IF and only IF, that charge MODE selected, would allow it. After
power up, and if switch is again held depressed for 10 seconds, the
Equalization Charge Stage is toggled to OFF (de-asserted from the charge
algorithm Regiment).
oIf depressed for at least 1 second, but released less than 10 seconds, the
menu display toggles up to the next incremental menu and stays active for
approximately 30seconds before reverting back to the default menu in effect
previously. You will know when the 1second period has been reached
because the LCD Backlight will ‘Blink’.
Five Menus are made available and are selectable via the Menu Select Button:
Annunciation (Start Up) Menu
Charge Status And Output Display
Charge Status And Input Display
Error Code Display
Charge Status and Temperature Display
ANNUNCIATION (START UP) MENU
oDisplay shows (assume 24V Battery Charger):
MD: MODE is annunciated as ‘2’, MODE-2
TYPE: Type is annunciating the battery type as:
225 Ampere Hour Size
Battery Pack Class is ‘02’ – Flooded Lead Acid
Refer to Battery Type Class Table for full list
STAT: Status Identifier. Refer to Status Identifier Table
This menu displays as the default menu during the initial 4 second
power-on start up
Battery Type Class Table:
01: AGM Lead Acid Battery 02: Flooded Lead Acid Battery
03: GEL Lead Acid Battery 04: Pure Lead –Lead Acid Battery
05: Spiral Lead Acid Battery 06: Uncategorized Lead Acid
07: Lithium Based Battery 08: Molten Salt Based Battery
09: Nickel Based Battery 10: Organic Based Battery
11: Potassium Based Battery 12: Silicon Based Battery
13: Silver Based Battery 14: Sodium Based Battery
oCall factory for additionally available Algorithms developed for rechargeable
chemistries that can be downloaded into a spare MODE. Also, refer to the
‘Accusense Charge Suite Application’ section for further details.
MD ---TYPE--- STAT
02 0225Ah02 --HF--

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CHARGE STATUS AND OUTPUT DISPLAY MENU
oDisplay shows (assume 24V Battery Charger):
STAT: Status Identifier. Refer to Status Identifier Table
-Vdc-: Battery Voltage measured on the output leads
-Adc-: Charge Current Output measured in amps
This menu displays as the default menu during charging. The Status
displays the current charge stage in effect –for example, cCCT is Bulk
Constant Current Charge Stage.
CHARGE STATUS AND INPUT DISPLAY MENU
oDisplay shows (assume 24V Battery Charger):
STAT: Status Identifier. Refer to Status Identifier Table
-Vdc-: Battery Voltage measured on the output leads
-Adc-: Charge Current Output measured in amps
This menu does not display as a default. It must be selected.
Additionally, only the Vac is displayed and is for reference use by Tech
Support, only –the value is not indicative of actual utility AC power
ERROR CODE DISPLAY MENU
oDisplay shows (assume 24V Battery Charger):
ERROR Code: Refer to LCD Error Code Table
Second Line: Brief Description of Error –Refer to Troubleshooting
This menu displays as the default menu after an Error Condition has
been reported.
Additionally, the backlight flashes in an on-on-on-off pattern, repeatedly
CHARGE STATUS AND TEMPERATURE DISPLAY MENU
oDisplay shows (assume 24V Battery Charger):
STAT: Status Identifier. Refer to Status Identifier Table
Int*C: Internal Charger Temperature in Celsius
Ext*C: External Battery Temperature in Celsius
This menu does not display as a default. It must be selected.
STAT ---Vdc--- ---Adc---
cCCT 27.4 20.1
STAT ---Vac--- ---Aac---
cCCT 127.4 N/A
ERROR_Code -> 01
Battery OverVolt
STAT Int*C Ext*C
cCCT 37 25

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Status Identifier Table:
NoBt: No battery detected. AC Is applied but output does not
detect a battery or battery could be severely discharged
down beyond point of not being detected.
StBy: Battery has been detected, but AC. Power has not been
detected –therefore sit in Standby Mode
Paus: Pause –Charging is suspended. Typically used with Over-
The-Cloud Tech support where a command was sent to
‘pause’ operation
Acof MnTr Mode: AC is disconnected. Charger is in Monitor Mode –still
connected to battery. This is an indicator that charging was
completed, but then A.C. power was disconnected
cPQT Pre-Qualification-Test Charge Stage in effect
cCCT Bulk Constant Current Charge Stage in effect
cCPW Bulk Constant Power Charge Stage in effect
cCVT Absorption Constant Voltage Charge Stage in effect
cTOP Top-Off Finish Charge Stage in effect
cEQU Equalization Charge Stage in effect
cFIN Float/Maintenance Standby Stage in effect
cFTR Float/Maintenance Standby Stage is in effect, but entered
with an advisory to check battery pack
ERRr Charge Error detected –charging has stopped
WAIT Waiting…
50Hz 50Hz Declaration –Product must use 50Hz utility Power
60Hz 60Hz Declaration –Product must use 50Hz utility Power
_HF_ HF or Hybrid Product Design Declaration
AC Drop Out AC has disconnected –Sit in Monitor Mode till AC restored.
This is an indicator that charging was terminated when A.C.
Power was disconnected.
TSTg Testing product due to possibility of missing factory installed
TestPassCode –the product is trying to reconfigure itself
from internally saved configuration data.
9. ERROR CODE DESCRIPTION
The number of Error Codes available exceeds a count of 32 (up to 64 are possible). With
5-LEDs available, only Code Numbers 1-31 can be displayed. Therefore, for LED based
products, two Error-Code Annunciating Flash Patterns are employed which allows for the
display of 1-31 using one pattern and 32 to 64 using an alternate pattern:
Flash in a pattern of ‘3-Fast-Flash, then off, 3-Fast-Flash etc. This Error Flash
Pattern is annunciating an error in the range of 1 to 31.
Flash at a very fast rate. This Error Flash Pattern is annunciating an error in the
range of 32 to 63.
LCD based models display the Error Code Number in readable format without limitation.
The readable number is equivalent to the number displayed on an LED based product.
During an Error Code Annunciation, the charge cycle has terminated its normal operation,
prematurely. An abnormal charging condition was detected and charging stopped due to a
Charge Error Condition. Refer to the following Charge Error Table for an extended
description of the failure or condition and its possible remedy. Error Code Values 1-31,
which use the first flash pattern, are not highlighted. Error Code Values 32-64, which use
the second flash pattern are highlighted in yellow.
‘ALERTS’ are highlighted in magenta.

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CHARGE ERROR TABLE: Errors 1-64: Flashing LEDs
0=OFF, 1=Flashing, S=Solid
Condition LED-1 LED-2 LED-3 LED-4 LED-5 Readable
Battery Over Voltage 0 0 0 0 1 1
Battery Temperature Low 0 0 0 1 1 3
Battery Temperature High 0 0 1 0 0 4
Battery Pack Unbalanced –V 0 0 1 1 1 7
Battery Pack Unbalanced –A 0 1 0 0 0 8
Batt Is 100% Discharged 0 1 0 0 1 9
Batt Beyond Over Discharged! 0 1 0 1 0 10
Batt Emergency Under-Voltage 0 1 0 1 1 11
Batt Temperature Sensor Open 0 1 1 1 1 15
Batt Temperature Sensor Shorted 1 0 0 0 0 16
Batt Over-Temperature 1 0 0 0 1 17
Battery Storage Error 1 0 0 1 1 19
Battery Testing Error –Sulphated 1 0 1 0 0 20
Battery Testing Error –Discharged 1 0 1 0 1 21
Bulk Charge Safety Time Error 1 1 0 0 1 25
Absorption Safety Time Error 1 1 0 1 0 26
Excessive Safety Time Error 0 0 0 0 1 32
Mode Selected Not Valid –Empty 0 0 0 1 0 33
Product Not Operational! 0 0 0 1 1 34
Lockout (Inhibit) Enable Defective 0 0 1 0 0 35
Lockout (Inhibit) Disable Defective 0 0 1 0 0 36
Internal Over Temperature 1 0 0 0 1 48
Finish Stage Exit via High Voltage S 0 0 0 1 ---
Equ. Stage Exit via High Voltage S 0 0 0 1 ---
Battery Over Voltage
oCharger’s Output DC Cable connection is possibly connected to a battery pack
with voltage higher than the output rating of the charger.
Battery Temperature Low/High
oIf an external thermistor is connected in the application, the charger has detected
an attempt to use the battery out of its recommended temperature range… thaw
the battery if cold or cease charging and allow battery to cool down before
attempting to restart charge.
Battery Pack Unbalanced –V:
oCaused by unbalanced battery condition and or excessive battery plate
sulphation during Bulk Constant Current Stage. Example: some batteries are at a
much higher state of charge than others. This may require replacement of the
batteries. Refer to the Equipment’s Operators manual for instructions on
servicing the battery pack.
Battery Pack Unbalanced –A:
oCaused by an unbalanced battery condition during Absorption Constant Voltage
Stage. Inspect each battery with a load tester as well as observe if any battery is
‘hotter’ to the touch than other batteries in the pack. The indication is that a
cell(s) within the pack may have shorted, or experienced stratification of the
electrolyte (over-charging due to incorrect MODE setting) and may require
replacement of the batteries. Refer to the Equipment’s Operators manual for
instructions on servicing the battery pack.

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Batt Is 100% Discharged
oBased on 1.75Vdc/cell, this error is produced when cell voltage falls below this
value (example: 21Vdc for 24V Battery Pack). A.C. Power should be connected
to charger and charging initiated immediately.
Batt Emergency Under-Voltage
oBased on 1.31Vdc/cell, battery may have been subjected to an extended Over-
Discharge condition (example: 15.75Vdc for a 24V Battery Pack) and battery is in
danger of becoming damaged beyond probable repair. Using a voltmeter check if
battery voltage is well under its 100% depth of charge. Remove all loads from
battery, including charger and allow time for battery pack to ‘spring’ back to
above 1.31V/cell. Reconnect only the charger to battery pack and allow to
charge.
Batt Beyond Over Discharged!
oBased on 1Vdc/cell, battery may have been subjected to an extreme Over-
Discharge condition (example: 12Vdc for a 24V Battery Pack) and battery
damage is beyond probable repair –expect a shortened life span for battery.
Charge will have turned off completely, to avoid adding to the decaying process.
Using a voltmeter check if battery voltage is well under its 100% depth of charge.
Remove all loads from battery, including charger and allow time for battery
pack to ‘spring’ back to above 1Vdc/cell. Reconnect only the charger to battery
pack and allow to charge.
Batt Temperature Sensor Open/Shorted
oIf a Battery Temperature Sensor Cable was installed at start of charging, but then
later found to be open or short circuited, this error is produced. Inspect
Temperature Device cable for breaks or shorts and correct.
Batt Over-Temperature
oIf a Battery Temperature Sensor Cable is installed at start of charging and a
maximum battery temperature is reached, further charging is then terminated and
an error condition is produced. Check batteries for possible cell damage and
perform a load test on each battery.
Battery Storage Error
oWhile equipment and battery sits in storage for an excessive amount of time,
batteries have depleted. Charging is required immediately. Connect Charger to
A.C. Power to start charging –error will clear.
Battery Testing Error –Sulphated / Discharged
oThis error is only generated by one of two conditions found during the Pre-
Qualification-Test Charge Stage:
oSulphated: Severely sulphated battery plates are preventing a charge flow from
increasing above a minimum value. Disconnect and reconnect AC Power to
charger to restart this stage. If a second attempt failed, load test each battery and
replace any failed battery.
oDischarged: A severely discharged battery did not charge up to 1.75Vdc per cell (
for example –21Vdc for 24V-battery ), within an allotted time span of
approximately 4 to 8 hours. Check for heavy loads preventing battery from
increasing charge and/or defective batteries that will not accept a charge.

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Bulk Charge Safety Time Error
oOccurs during the Bulk Charge Stage when its associated safety timer times out
AND the battery voltage was not allowed to increase above 2.17V/cell. Possible
causes include: use of a battery load that is draining energy from the battery
while the charger is trying to charge that same battery, aged or unbalanced
battery cell conditions, etc.
Absorption Charge Safety Time Error
oOccurs during the Absorption Charge Stage when its associated safety timer
times out AND the battery voltage was dragged below 2.17V/cell. Possible
causes include: use of a heavy battery load that drained energy from the battery
while the charger was trying to charge that same battery.
Excessive Charge Time Error
oOccurs when charging took too long AND the battery voltage was not allowed to
increase above 2.17V/cell. Possible causes include: use of a battery load that is
draining energy from the battery while the charger is trying to charge that same
battery, aged or unbalanced battery cell conditions, etc.
Mode Selected Empty
oThe selected Charge Algorithm, set via the User Selected Switch Setting, is
empty and not a valid setting for charging batteries –reset the MODE Select
switches to a valid value.
Lockout (Inhibit) Enable Defective
oIf an Equipment Lockout (Inhibit) Cable is installed and supposed to be active,
but it is not, this error is produced –Check Inhibit vehicle wiring. If correct,
internal inhibit switch may have been overload –contact factory. Also refer to the
Lockout Inhibit Option Section for External Wiring diagram for this circuit
schematic and how it interfaces to an equipment’s Run-Contactor.
Lockout (Inhibit) Disable Defective
oIf an Equipment Lockout (Inhibit) Cable is installed and supposed to be
deactivated, but was not, this error is produced –Check Inhibit vehicle wiring. If
correct, internal inhibit switch may have been overload –contact factory. Also
refer to the Lockout Inhibit Option Section for External Wiring diagram for this
circuit schematic and how it interfaces to an equipment’s Run-Contactor.
Internal Over Temperature
oCharger shut down due to an internal over temperature condition –check fan
operation and remove blockages, if any. Also, remove any air flow obstructions in
and around the immediate vicinity of the product. Clean/clear away grease, grime
and any debris from product. If this does not remedy situation, product may have
been permanently damaged. Contact the factory or your point of distribution.
Alert Definitions and Meaning
oDuring Finish or Equalization Charge Stages, if the upper safety voltage was
reached, the stage was terminated. It ‘MAY’ be an indication of loose or corroded
terminals or other condition that produced a resistance into the charge path.
Check all connections. The Green LED Flashing Alerts are as follows:
Slow = Finish Stage, Medium = Equalization Stage, Fast = Total Charge Timer

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10. TROUBLESHOOTING AND TECHNICAL GUIDE
To be able to troubleshoot safely and effectively, it is important to read this guide
completely before beginning any tests.
WARNING: DO NOT DISASSEMBLE THE CHARGER. TAKE IT TO A
QUALIFIED SERVICE AGENT WHEN SERVICE OR REPAIR IS REQUIRED.
INCORRECT REASSEMBLY MAY RESULT IN A RISK OF ELECTRIC SHOCK
OR FIRE. THE FOLLOWING PROCEDURES ARE INTENDED ONLY TO
DETERMINE IF A MALFUNCTION MAY EXIST IN THE CHARGER.
DANGER: TO REDUCE THE RISK OF ELECTRIC SHOCK, ALWAYS
DISCONNECT THE CHARGER’S AC CORD SET FROM AC POWER AND ITS
DC CORD SET FROM BATTERIES BEFORE ATTEMPTING ANY
MAINTENANCE OR CLEANING
LEDs Frozen (no activity) or Charger seems inoperable:
oBattery may have been subjected to an Over-Discharge condition. Using a
voltmeter check if battery voltage is well under its 100% depth of discharge level
defined as 1.75V per cell for lead acid batteries. For example, if a 24V lead acid
battery measures well under 21V, then this condition may have occurred as a
result of batteries left in lengthy storage without a trickle charge applied to it. Try
removing the output leads from the battery pack (while A.C. Power is
disconnected from the charger) and reconnecting the output leads.
Batteries Hot To the Touch –Charger Continues To Charge:
oA hot battery(s) signifies cells that are:
Shorted due to material coalesced at the bottom of the cell and not able to
break down and recombine back onto the battery plates, and/or
Stratification of the acid into layers where a denser acid layer is carrying
most of the amperage
An overcharged cell due to other cells being unbalanced and at a much
lower state of charge
oPossible corrections include
Cease charging, operate vehicle to slightly discharge battery pack, and then
reapplying a charge
Breaking apart the battery pack and load test each battery –replace
defective batteries
Check Charger MODE settings and ensure it is properly set to the battery
selected to charge
Battery Run-Time Decreasing:
oRefer to the Accusense Charge Suite Application section to review the many
tools available that aid supporting the analysis of historical charge/discharge data
which may pinpoint possible remedies.

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TECHNICAL NOTES
Do not connect charger to a receptacle that shares its circuit with other
loads such as motors and most all common appliances. These shared
circuits cause severe line voltage droops that, upon appliance abruptly
turning on or off, will cause instantaneous line voltage changes that may
be beyond the ability of the charger to compensate fast enough, causing
permanent non-warranty damage to charger.
Do not charge more than one battery pack at a time. Battery pack characteristics
differ and may cause the microprocessor to misinterpret algorithmic values and
possibly function improperly.
If charging a series connected string of two or more batteries or cells,
ensure that all batteries and cells in the series connected string, are all at
the same state of charge, age, type, and condition.
The charger uses RF energy only for its internal functions. Therefore its RF
emissions are very low and are unlikely to cause any interference in nearby
electronic equipment.
The charger has an operating temperature range of -35C to +55C, and a
shipping/storage temperature range of -40C to +125C. It needs to be stored in
clean, dry conditions.
Medical Electrical Equipment needs special precautions regarding EMC and
needs to be installed and put into service according to the EMC information
provided in this manual.
Portable and mobile RF communications equipment can affect Medical Electrical
Equipment.
The use of Accessories, transducers, and cables other than those specified by
the manufacturer, may result in increased Emissions or decreased Immunity of
the Battery Charger.
The Battery Charger should not be used adjacent to or stacked with other
equipment and that, if adjacent or stacked use is necessary, the Battery Charger
should be observed to verify normal operation in the configuration in which it will
be used.
Important: If batteries are left in storage for a lengthy period (months), Charger
should be connected to AC Power continually or periodically (once per month) to
replenish batteries self- discharged condition to prevent possible permanent
damage to battery.
Charge History Database Retention: The charger employs the use of FLASH
memory to retain more than two years of charge history. Use of the Accusense
Charge Suite Application opens up many possibilities and levels of technical
analysis and support.