KISAE Abso Charger

Product Numbers

• AC12100: Abso Charger 12V 100A
• AC2450: Abso Charger 24V 50A

Service Contact Information

• Email: info@kisaetechnology.com
• Phone: 1 877 897-5778
• Web: www.kisaepower.com

California Proposition 65 Warning

WARNING: This product can expose you to chemicals, including Di (2-ethylhexyl) phthalate (DEHP) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov

ADVERTENCIA: Este producto puede exponerlo a productos químicos, incluidos Di (2-etilhexil) ftalato (DEHP) que el estado de California sabe que causa cáncer, defectos de nacimiento u otros daños reproductivos. Para obtener más información, vaya a www.p65warnings.ca.gov

Table of Contents

• 1. INTRODUCTION
• 2. PRODUCT DESCRIPTION
• 3. UNDERSTANDING THE UNIT
• 4. INSTALLING THE CHARGER
• 5. UNIT OPERATION
• 6. SPECIFICATIONS
• 7. WARRANTY
• Appendix A1 (GEL, Flooded, AGM Setting CH1, CH2/CH3)
• Appendix A2.1 (Lithium Setting CH1)
• Appendix A2.2 (Lithium Setting CH2/3)
• Appendix A3.1 (Program Setting CH1)
• Appendix A3.1 (Program Setting CH2/3)
• Appendix B (CH1, CH2, CH3 Charging)

IMPORTANT SAFETY INFORMATION

Read all instructions and cautionary markings before using the unit. The KISAE Abso Charger contains no user-serviceable parts. Refer to the Warranty section for product issues.

WARNING: Fire and/or Chemical Burn Hazard! Do not cover or obstruct any air vent openings and/or install in a zero-clearance compartment.

WARNING: Failure to follow these instructions can result in death or serious injury. Keep away from children! When working with electrical equipment or lead acid batteries, have someone nearby in case of an emergency. Study and follow all the battery manufacturer's specific precautions when installing, using, and servicing the battery connected to the charger. Wear eye protection and gloves. Avoid touching your eyes while using this unit. Keep fresh water and soap on hand in the event battery acid comes in contact with eyes. If this occurs, cleanse right away with soap and water for a minimum of 15 minutes and seek medical attention. Batteries produce explosive gasses. DO NOT smoke or have an open spark or fire near the system. Keep the unit away from moist or damp areas. Never expose the unit to snow, water etc. Avoid dropping any metal tool or object on the battery. Doing so could create a spark or short circuit which goes through the battery or another electrical tool that may create an explosion.

WARNING: Explosion hazard! Do not use the unit in the vicinity of flammable fumes or gasses (such as propane tanks or large engines). Avoid covering the ventilation openings. Always operate the unit in an open area. Prolonged contact with high heat or freezing temperatures will decrease the working life of the unit.

CAUTION:

• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• Do not charge non-rechargeable batteries because of the danger of eruption.
• During charging, the batteries have to be placed in a ventilated area.
• The battery terminal not connected to the chassis has to be connected first. The other connection is to be made to the chassis, remote from the battery and fuel line. The battery charger is then to be connected to the supply mains. After charging, disconnect the battery charger from the supply mains. Then remove the chassis connection and then the battery connection.
• Only allow children at least 8 years old to use the battery charger. Give sufficient instruction so that the child is able to use the battery charger in a safe way and explain that it is not a toy and must not be played with. The child does not try to charge non-rechargeable batteries because of the danger of eruption.
• Examine the battery charger regularly for damage, especially the cord, plug, and enclosure. If the battery charger is damaged, it must not be used until it has been repaired.

FCC INFORMATION

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules and comply with the CE EMC Standard. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment can generate, use, and radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

LIMITATIONS ON USE

Do not use in connection with life support systems or other medical equipment or devices.

1. INTRODUCTION

Thank you for purchasing the KISAE Abso Charger. With its state-of-the-art, easy-to-use design, this product will offer reliable service by providing a multi-stage, multi-bank battery charger to charge different types of batteries installed in your boat, RV, vehicle, or cabin battery bank. An innovative feature is the ability to charge your main battery bank as a first priority, allowing for quick charging. Another unique feature is the silent mode setting that reduces fan speed at night, thereby reducing fan noise. This manual explains how to use this unit safely and effectively. Please read and follow these instructions and precautions carefully.

2. PRODUCT DESCRIPTION

The Abso Charger includes the items listed below:

3. UNDERSTANDING THE UNIT

The Abso Charger is a fully automatic, negative grounding, multi-stage battery charger capable of charging 3 separate battery banks. When first connected to an AC power source, the charger checks all three battery banks before charging commences. The charger operates on an isolated charging design where Battery Bank 1 is separate from Battery Bank 2 and 3. Battery Bank 1 is the priority battery bank in the charging sequence and is recommended to be connected to the main (or primary house) battery bank. Battery Bank 1 can be programmed with a different charge algorithm from Banks 2 and 3 (including different battery chemistries like GEL, Flooded, AGM, Lithium, or a Program battery type, and different charging current). Battery Banks 2 and 3 can also be programmed identically to Bank 1 or to any other type available on the setting list.

Battery Banks 2 and 3 are always connected in parallel internally (with a separation diode) and share a common charge algorithm. During normal operation, the charger performs a full charge cycle to the float stage on Battery Bank 1. Once the float stage is reached, the charger starts charging Battery Banks 2 and 3 together in bulk and absorption modes. Upon completion, all three battery banks move to the float stage with a shared battery voltage determined by Battery Bank 1's float voltage settings.

The Abso Charger also features a unique function: if it senses either Battery Bank 2 or 3 has a battery connected and the battery voltage is below 11V (on 12V model AC12100) or below 22V (on 24V model AC2450) when the charging sequence starts, it will cycle to charge Bank 1 for 15 minutes, then Bank 2 and 3 together for 15 minutes, and repeat. When the charger senses both Bank 2 and 3 reach 13V (on 12V model AC12100) or 26V (on 24V model AC2450), it will then concentrate on charging Bank 1 until it reaches the float stage. After that, it will concentrate on recharging Bank 2 and 3 (together) to the float stage. Upon completion, all three battery banks move to the float stage with a shared battery voltage determined by Battery Bank 1's float voltage settings.

During the float stage, each battery bank is isolated by an internal separation diode.

Another unique feature is Silent Mode, whereby the charger can reduce fan speed at night or whenever required. This setting can be manually turned ON and OFF via the display and remains active for a period of 12 hours. The charger also has the ability to awaken an over-discharged Lithium battery whose output has been terminated by its internal BMS circuitry. This manual activation function will awaken a lithium battery that has shut down due to under-voltage.

Important Note: Battery Bank 1 on the charger should only be connected to the main battery bank for first priority charging. Battery Banks 2 and 3 on the charger are to be connected to other battery banks with lower priority (such as a jump-start battery bank and/or an AC generator battery bank used in a marine application). On single bank installations, it is recommended to use Bank 1 on the charger.

Typical wiring block diagram of the Battery Charger with 3 battery banks

A textual description of the diagram shows the following components:

• AC Source: The charger accepts full universal input voltage (90-265Vac, 47-63Hz).
• Branch Breaker: For 120V AC Input, use a 15A branch breaker. For 230V AC Input, a minimum of 8A branch breaker is required.
• Battery Bank 1, 2 & 3: Three channels (CH1, CH2, CH3) are available for charging three battery banks.
• Chassis Ground: The unit chassis must be grounded properly to the common ground point on the system.
• Digital Remote (optional): The Display Remote (Part Number: ACRM1202) provides unit information and can be used as a secondary display or to connect two AC Chargers of the same model in parallel.
• Battery Temperature Sensor – BTS (optional): The Battery Temperature Sensor BTS (Part Number: BTS-10K) is designed for Battery Bank 1 (CH1) for better charging performance. It terminates charging if the battery temperature is too high or too low.

Understanding the Multi-Stage Charging Process

The charger is a fully automatic "set-and-forget" design, utilizing charger algorithms to quickly and accurately recharge deep cycle batteries, maximizing their life. The charger features a multi-stage smart charging technology that allows it to be permanently connected to the battery banks. As dictated by battery manufacturer recommendations, deep cycle batteries require a multi-stage charge sequence for perfect, fast, and accurate charging. This charger delivers four primary charge stages: Bulk Charge, Absorption Charge, Float, and Maintenance.

Typical charging profile of the charger

• Bulk Charge (`bUL`): The battery is charged at the charger's full rated output current until it reaches the absorption voltage. Approximately 80% of the battery's capacity is recovered as fast as possible. During this stage, an 8-hour timer starts when the battery voltage reaches approximately 13.5V. This timer is a safety feature to prevent overcharging; if it times out, the charger moves to the Float stage, overriding the absorption-to-float condition.
• Absorption Charge (`AbS`): With the charger voltage held steady, the remaining 20% of capacity is replaced, allowing the current to drop as the battery approaches full charge. There is a 4-hour time limit on this stage to prevent overcharging. If the timer times out, the charger moves to the Float stage.
• Float Stage (`FLo`): The charger voltage is lowered and held at a constant, safe predetermined level. This prevents overcharging while supplying enough current to compensate for self-discharge losses and support any additional loads connected to the battery (e.g., DC lighting, refrigerators). This stage allows the charger to function as a DC power supply.
• Maintenance: This is a regular timed recharge (or return to the bulk stage). The charger switches from the float stage to bulk charge after 7 days of constant operation to ensure the battery banks remain active.

4. INSTALLING THE CHARGER

WARNING: It is recommended that all wiring be done by a certified technician or electrician to ensure adherence to applicable electrical safety wiring regulations and installation codes. Failure to follow these instructions can damage the unit and could also result in personal injury or loss of life.

CAUTION: Before beginning your unit installation, please consider the following:

• The unit should be used or stored in an indoor area away from direct sunlight, heat, moisture/water, or conductive contaminants.
• When placing the unit, allow a minimum of three inches of space around the unit for optimal ventilation.

Mounting the Charger:

• Choose an appropriate mounting location.
• For indoor installations, the unit can be mounted in any direction.
• For installations in a boat or marine environment, the unit can be mounted horizontally and vertically (AC and DC panel facing downwards) only.
• Use the mounting template (not provided in text) to mark the positions of the mounting screws.
• Drill the 4 mounting holes and place the Charger in position, then fasten the unit to the mounting surface.

Note: The charger is designed to be permanently mounted.

Chassis Grounding Connection:

DANGER: The unit chassis must be grounded properly. Never operate the Charger without proper grounding. Failure to do so will result in death or serious injury. The ground connection to the charger must comply with all local and application-specific codes and ordinances. Connect the unit's chassis ground to the common ground point through the ground stud located near one of the unit's mounting slots.

DC Output Wiring:

WARNING: The DC wiring used must be of appropriate size. An individual over-current protection device, usually within 7 inches (17.8cm) of each battery bank, is required. A DC disconnect switch is also recommended. Both devices must be rated for DC voltage and current and be rated to withstand the short circuit current available from the connected battery bank. Both devices must match the size of the DC wiring.

Procedure:

1. Remove the DC compartment cover by removing the two screws located on the top surface of the unit near the AC wiring compartment.
2. Keep the connection between the battery and the charger as short as possible.
3. Connect one end of the positive wire (red wire) to the Battery Bank 1 positive terminal with torque 4.0~5.0 N-m (35~45 lb-in). Connect the other end to the over-current protection device, then the DC disconnect device. Do not overtighten as this may result in damage to the charger.
4. Connect another wire from the DC disconnect device to the battery bank.
5. For systems with multi-battery banks: Follow the same instructions as for Battery Bank 1 and connect to Battery Bank 2 and 3 accordingly.
6. Prepare the negative wire (black wire) and connect it to the negative terminal of the charger. Connect the other end of the negative wire to all the negative terminals of the battery bank(s).
7. Place the DC Compartment cover back to its original position and secure the cover using the two screws provided.

AC Input Wiring for 120V AC Input System with Hardwire Input:

WARNING: The AC wiring must be of appropriate size and protected by an appropriate branch breaker (not provided) connected between the AC source and the charger. A three-color-coded #12 AWG wire (L, N, and GND) with a rated minimum of 75°C wire and a minimum 12 inches in length must be used. Before connecting AC wiring, ensure the AC source is OFF.

1. Remove the AC compartment cover by unscrewing the two screws located at the top of the AC compartment cover.
2. Remove the top section of the AC Input wire strain relief located at the bottom of the base panel inside the AC wiring compartment by unscrewing the two strain relief mounting screws.
3. Use the provided butt-splices to extend the AC Input wires (L, N & GND) to the customer-provided AC wire.
4. Feed the extended AC Input wire through the strain relief located at the bottom of the unit's base panel.
5. Place the top section of the strain relief back to its original position and secure the AC extended wire by using the strain relief and tightening its two provided screws.
6. Connect the other end of the extended AC wire to the chosen AC branch breaker and, in turn, to the AC power source. Verify all connections: charger's AC Live-wire (black) to the extended AC black wire, charger's AC Neutral wire (white) to the extended AC white wire, and charger's AC green wire to the extended AC green wire.

Optional Battery Temperature Sensor (BTS) Connection:

The Battery Temperature Sensor (BTS-10K) is a cable assembly with an RJ12 plug on one end and a ring terminal (lug) on the other. For single charger operation: Connect the RJ12 plug from the BTS to the BTS Port on the charger. Connect the ring terminal (lug) from the BTS to the negative terminal of Battery Bank 1.

For parallel charger operation (use same model only): Two temperature sensors (BTS-10K) are required. Install the first sensor as described above. Connect the second sensor's RJ12 plug to the BTS port on the second charger. Connect the ring terminal (lug) to the same negative terminal of Battery Bank 1 on the second charger.

Optional Remote Display Panel (ACRM1202) Connection:

For use on a single charger unit: Install the optional Remote Display Panel in the desired location. Use an RJ12 6-wired Rolled Over (Rollover) type cable. Connect one end of the RJ12 cable to the Remote Port on the charger and the other end to the COM_1 port on the Remote Display Panel (do not use COM_2). The panel is now ready for use as a secondary display.

For use with two charger units connected in parallel (use same model only): A second RJ12 cable is required. Install the second charger close to the first. Connect the second RJ12 cable between the second charger's Remote Port and the COM_2 port on the Remote Display Panel. The display panel will show `CON' indicating the chargers are connected in parallel, and all three push buttons on both chargers will be disabled. Before connecting batteries: Connect Battery Bank 1 CH1 of Charger_1 to CH1 of Charger_2; CH2 of Charger_1 to CH2 of Charger_2; CH3 of Charger_1 to CH3 of Charger_2. The Common Ground of both chargers must be connected together. Note: Damage to both chargers may occur if these connections are not followed. The setting for the combined chargers is based on Charger_1. To readjust, use the Remote Display Panel. Tip: Pre-set the desired charger settings on Charger_1 before connecting the second RJ12 cable to Charger_2, as the charger buttons become disabled once connected in parallel.

5. UNIT OPERATION

Understanding the Battery Charging Current Setting:

The battery charging current rating is based on battery size. When charging GEL, AGM, and Flooded batteries, each battery bank should meet the minimum Ah rating shown below. If a smaller battery bank is used, set the current rating to a lower value. Normally, the maximum charger current rating is based on half the battery bank capacity.

When charging a Lithium battery, consult the Lithium battery manufacturer for maximum allowable charging current. In float stage, the charger can provide a maximum float current of 80A for AC12100 and 50A for AC2450.

Understanding the Digital Display:

• `GEL`, `AGM`, `Flooded`, `Lithium`, and `Program` icons represent different battery type settings.
• With only `CH1` icon turned on, the numerical value shows individual battery information like battery voltage and charging current.
• With `CH2` and `CH3` icons turned on together, the numerical value shows the total charging current to both battery banks.
• During normal operation, the display shows the related channel's battery voltage, charging current, and charging stage (Bulk-`bUL`, Absorption-`AbS`) alternately.
• When all channels have reached Float/Full stage, the display shows `FUL`, indicating that all connected batteries are fully charged.

Understanding the `INFO`, `NEXT`, and `SET` Function Keys:

Under Normal Operation (with AC Input connected):

• `INFO`: Press and hold for longer than 3 seconds to enter charger setting mode. Use `SET` key to toggle settings. Press `NEXT` to save the chosen setting (display flashes 3 times). The display then shows the next menu.
• `NEXT`: Press and hold for longer than 5 seconds to RESET the charger. Display shows `RST`, forcing a restart from Bulk mode. The charger can also be RESET by disconnecting AC Input for 5 seconds and reconnecting.
• `SET`: Press and hold for longer than 3 seconds to activate Silent Mode operation; the `Auto` icon will show. Press and hold again for longer than 3 seconds to cancel Silent Mode; the `Auto` icon turns off. (See "Understanding and Executing the Silent Mode Function").

With No AC Input connected:

• `INFO`: Pressing and holding for longer than 3 seconds temporarily turns on the display for about 10 seconds, showing battery voltage for all 3 channels. If "0.6V" or "0.7V" is read, it means no battery is connected. The display then shows the charger revision number (e.g., `r1.0`).

Understanding the Two-Stage (Mode 2) and Three-Stage (Mode 3) Charging Functions:

• Mode 3 Charging: Features Bulk, Absorption, and Float sequences. The charger automatically restarts the full charging cycle if any battery bank is discharged below 12.5V (12V model) or 25.0V (24V model), or after seven days in Float stage.
• Mode 2 Charging: Similar to Mode 3 but without the Float stage. The charger terminates after the Absorption stage. It automatically restarts the full charging cycle if any battery bank is discharged below 12.5V (12V model) or 25.0V (24V model), or after seven days since the last Absorption stage.

Understanding the Battery Temperature Set Functions:

For use when Battery Temperature Sensor is NOT in use:

CAUTION: RISK OF BATTERY DAMAGE. If the temperature sensor is not used, never set the battery temperature lower than the actual temperature, as this may overcharge and damage the batteries. There are three manual battery temperature settings for GEL, Flooded, and AGM batteries:

• Low temperature (`Lo`): For charging in low-temperature environments.
• Normal temperature (`nor`): For charging at room temperature.
• High temperature (`HI`): For charging in high-temperature environments.

Note: The voltage adjustments for AGM type are +0.525V (12V) / +1.050V (24V) for Low, 0V for Normal, and -0.21V (12V) / -0.42V (24V) for High.

For use when Battery Temperature Sensor is in use:

No setting on the unit is required; the unit automatically senses the Battery Temperature Sensor when connected to the BTS Port, overriding manual settings. The sensor monitors Battery Bank 1's temperature and makes adjustments to the charging voltage for better performance.

The sensor terminates charging when battery temperature drops below -25°C (resumes above -20°C) or rises above 70°C (resumes below 60°C) for GEL/Flooded/AGM. For Lithium batteries, it terminates below 0°C (resumes above 5°C) or above 60°C (resumes below 55°C).

Understanding and Procedure to Set or View CH1 or CH2 and CH3 setting:

The following tables show preset values for GEL, Flooded, and AGM types, and user-selectable settings for Lithium and Program types.

Note 1: Manufacturing default setting for Lithium Battery/Program type is 14.4V (Abs) and 13.5V (Flo). Note 2: All voltages are doubled on the 24V charger AC2450.

Note: * Recommended setting (Factory Default Setting)

For GEL, AGM, Flooded battery type (Appendix A1): Settings include Battery type, Maximum charging current (`h-current`), Absorption to float stage current (`L-current`), Charging stages (Mode 2 or Mode 3), and Battery temperature (CH1 only: Low-`Lo`, Normal-`nor`, High-`hi`).

For Lithium battery type (Appendix A2.1, A2.2): WARNING: FIRE HAZARD! Consult battery manufacturer for all voltage and current settings. Incorrect settings may overcharge, damage the battery, or cause explosion and fire. Settings include Battery type, Maximum Charging Voltage (CV-`Abs`), Absorption to Float Voltage (`FLo`), Maximum Charging Current (CC) (`h-current`), Absorption to Float Current (Charge termination current) (`L-current`), and Charging stages (CH1 only: Mode 2 or Mode 3).

For Program type (Appendix A3.1, A3.2): WARNING: FIRE HAZARD! Consult battery manufacturer for all voltage and current settings. Incorrect settings may overcharge, damage the battery, or cause explosion and fire. Settings include Battery type, Absorption Voltage (`Abs`), Absorption to Float Voltage (`FLo`), Maximum Bulk Current (`h-current`), Absorption to Float Current (`L-current`), and Charging stages (CH1 only: Mode 2 or Mode 3).

Procedure to Equalize Flooded Battery:

DANGER: Explosion Hazard. Batteries generate explosive gasses during equalization. Follow all battery safety precautions. Ensure the connected battery is a flooded type; equalizing non-flooded batteries may cause explosion. CAUTION: Risk of Battery and Equipment damage. Only Flooded lead-acid batteries can be equalized. Consult your battery manufacturer. Disconnect any DC load connected to the battery, as the charger will produce 15.5V (12V model) or 31.0V (24V model) during equalization, which may damage connected DC loads. Monitor battery specific gravity throughout the process. Before setting equalization mode, ensure the battery is a flooded type. The charger will fully charge the selected channel first, followed by a 1-hour equalization process at 15.5V (12V) or 31.0V (24V). Consult the battery manufacturer for instructions on checking electrolyte levels and refilling with distilled or deionized water during equalization. All cells should have similar electrolyte levels. If water is added, batteries must undergo a complete charge cycle. The charger cannot determine when to terminate equalization; a one-hour timeout is a safety feature requiring manual re-activation. During equalization, the other two battery banks are disabled.

Procedure to Awaken Over Discharge Lithium Battery:

Some Lithium ion batteries have BMS circuitry that turns the battery off when over-discharged. The charger may not recognize a connected battery. To awaken it, press and hold `INFO` and `SET` buttons for 5 seconds. The charger will provide 13V (with 10A current limit) to the battery terminal for 10 seconds. If battery voltage is measured at the terminal after 10 seconds, the lithium battery is awakened, and the charger restarts the charging process. If no voltage is measured, the process terminates. This function works only on Lithium battery setting.

Understanding and Executing the Silent Mode Function:

A unique feature of the KISAE Abso Charger is the ability to reduce fan speed at night or whenever required. This setting is manually activated via the Digital Display.

Tips: Use this function during nighttime or when a quiet environment is needed. Please note that charging time will increase in this mode because the charging current may be derated.

This function can be switched ON or OFF at any time. To set, press and hold `SET` for 5 seconds; the `Auto` icon will show. To turn off, press and hold `SET` for 5 seconds; the `Auto` icon turns off, and charger current and fan speed return to normal. Note: The charger will automatically exit Silent Mode after 12 hours.

Procedure to Change CH1 to Power Supply mode:

1. Set CH1 to Program mode setting.
2. Press and hold `INFO` and `NEXT` buttons for 5 seconds.
3. Display will show `P` for approximately 5 seconds to indicate Power Supply mode is activated.
4. The charger will supply the set Absorption voltage in Program mode with a 100A current limit at CH1. The display will show the supplied voltage and current alternately.
5. To cancel Power Supply mode, press and hold the `NEXT` button for 3-5 seconds to reset the charger; CH1 will return to charging the battery in Program mode.

Note: Power Supply mode can only be used on CH1.

Understanding the Protection Features

• Derating the Charging Current: When the charger senses the environmental temperature is above 50°C, the maximum charger current will de-rate to 1/2 of its value (A02 warning code will display). The charger will recover automatically when the environmental temperature drops below 45°C.
• Over Temperature Shutdown: When the charger senses the environmental temperature is above 60°C, it will shut down. It will recover automatically when the environmental temperature drops below 45°C.
• Battery Reverse Polarity: When a reverse polarity is connected, Fault Code E03 will appear. In some cases, the user-replaceable DC fuse near the DC Output terminals may blow, and Error code E08 will display.
• AC Input Voltage Protection: The charger will shut down when the AC input voltage is outside the operating range. A fault code will display. The charger will recover automatically when the AC input voltage returns to the normal operation range.
• Disconnecting the Battery Bank: To avoid any spark at the battery terminal, always disconnect AC Input before removing or disconnecting the battery.
• BTS Shutdown (with optional BTS in use): To avoid battery damage, especially with Lithium batteries, the charging cycle will be terminated if the optional BTS senses the battery temperature is out of the charging range.

Charging Batteries with Low Voltage

The charger is designed to charge batteries with terminal voltages greater than 3Vdc (12V model) and 6Vdc (24V model). For lower voltages, batteries can be temporarily and partially charged using the charger's Power Supply mode under Program setting, before returning to the proper battery type setting. Please note that the Power Supply setting can only be used on CH1.

Reinitiating the Charging Cycle and Battery Connection Status Manually

The charging cycle can be reset or reinitialized at any stage. Press and hold the `NEXT` key for longer than 5 seconds to RESET the charger. The display will show `RST` and force the charger to restart the charging cycle from the Bulk mode. The charger can also be RESET by disconnecting the AC Input, waiting for 5 seconds, and reconnecting the AC Input.

Understanding the Error Codes

Error codes will be shown on the display when an internal fault (e.g., high internal temperature) or an external fault (e.g., AC input voltage out of range) is detected. The unit will shut down.

6. SPECIFICATIONS

Note: Specifications are subject to change without notice.