EXP-BCHR-120V-2X0.75-26A-4X
Larson Electronics, LLC
Phone: (877) 348-9680
Fax: (903) 498-3364
www.larsonelectronics.com
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of
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Understanding Charge LEDs
The charger has four (4) Charge LEDs per bank -
25%, 50%, 75% and 100%. These Charge LEDs
indicate the connected battery(s) state-of-charge
(SOC). See the explanation below:
LED
Explanation
Maintenance
Green LED
25%
Red LED
The 25% Charge LED will slowly
pulse “on” and “off”, when the
battery is less than 25% fully
charged. When the battery is 25%
charged, the red Charge LED will
be solid.
50%
Red LED
During maintenance charging, the
100% Charge LED will pulse “on”
and “off” slowly. When the battery
is topped off and fully charged
again, the 100% Charge LED will
turn solid green. The charger can
be left connected to the battery
indefinitely.
75%
Orange LED
The 50% Charge LED will slowly
pulse “on” and “off”, when the
battery is less than 50% fully
charged. When the battery is 50%
charged, the red Charge LED will
be solid.
The 75% Charge LED will slowly
pulse “on” and “off”, when the
battery is less than 75% fully
charged. When the battery is 75%
charged, the orange Charge LED
will be solid.
The 100% Charge LED will slowly
pulse “on” and “off”, when the
battery is less than 100% fully
charged. When the battery is fully
charged, the green LED will be solid,
and the 25%, 50% and 75% Charge
LEDs will turn “off”.
100%
Green LED
25% 50% 75% 100%
25% 50% 75% 100%
25% 50% 75% 100%
25% 50% 75% 100%
25% 50% 75% 100%
Understanding Advanced Diagnostics
Advanced Diagnostics is used when displaying Error Conditions.
It will display a series of blink sequences that help you identify
the cause of the error and potential solutions.
All Error Conditions are displayed with the Error LED and
Standby LED flashing back and forth. The number of flashes
between each pulse denotes a potential Error Condition (except
reverse polarity and low-voltage battery).
Error
Reason/Solution
Single
Flash
Battery will not hold a
charge. Have battery
checked by a professional.
Possible battery short.
Have battery checked by a
professional.
Battery voltage is too high
for the selected charge
mode. Check the battery
and charge mode.
Error LED
Solid Red
Reverse polarity. Reverse
the battery connections.
Battery voltage is too
low for charge to detect
or charger is in supply.
Jumpstart the battery to
raise the battery voltage.
Double
Flash
Triple
Flash
Standby
Solid Orange
Charging Steps
1
2
3
4
5
6
7
8
Step
Voltage (V)
itialize
Analyze
Diag Rec
nose
Mainte
zation
In
overy
Bulk
Optimi
Absorption
nance
Step 1 & 2: Analyze & Diagnose
Checks the battery’s initial condition, including voltage, state-of-charge and health, to determine if the battery is stable
before charging.
Step 3: Recovery
Initializes the Recovery desulfation process (if needed) for deeply discharged or sulfated batteries by pulsing small
amounts of current.
Step 4: Initialize
Starts the charging process with a gentle (soft) charge.
Step 5: Bulk
Begins the Bulk charging process based on the condition of the battery and returns 80% of the battery’s capacity.
Step 6: Absorption
Brings the charge level to 90% by delivering small amounts of current to provide a safe, efficient charge. This limits battery
gassing and is essential to prolonging battery life.
Step 7: Optimization
Finalizes the charging process and brings the battery to maximum capacity. In this step, the charger utilizes multi-layered
charging profiles to fully recapture capacity and optimize the specific gravity of the battery for increased run time and
performance. The charger will switch to Maintenance if the battery tells the charger that more current is needed.
