In detail: charger cedar auto 4a DIY repair from a real master for the site my.housecope.com.
Charger Cedar AUTO 4A. Instructions for use
Instructions for use of the prestarting charger Cedar AUTO 4A
The charger Kedr AUTO 4A is intended for charging and restoring the performance of acidic lead 12-volt batteries, partially lost as a result of sulfation and oxidation of electrodes, as well as training them by carrying out charge-discharge cycles in order to increase the resource, service life and preservation.
The device Kedr AUTO 4A provides automatic shutdown at the end of the charge in the "AUTOMATIC" mode. The device has a dial indicator (ammeter) and a light indicator, which: when the "AUTOMATIC" mode is switched on - does not light up; at the end of the charge in the "AUTOMATIC" mode - blinks; when the "CYCLE" mode is turned on, it glows evenly.
The KEDR-AUTO device provides an accelerated mode of charging a completely discharged (up to 10 V) battery with a compromise value of the initial current equal to 3 - 4 A. At the same time, after 1 - 2 hours (depending on the degree of battery discharge and voltage in the network), the value of the charging current decreases to a value of about 2 A and continues to decrease by the end of the charge to 1 A or less. This mode eliminates significant heating of the battery during charging and reduces the charging time of a fully discharged battery to 3 - 6 hours.
Before using the device, you must study the rules for the care and use of batteries.
ATTENTION! Before working with the "Kedr-auto" charger, you must carefully study these operating instructions.
![]() |
Video (click to play). |
Be careful! The charger contains life-threatening voltages.
Before replacing the fuse and making repairs, disconnect the charger from the mains.
Do not use a homemade fuse, this may damage the device.
Do not charge batteries near stoves, radiators (at a distance of less than 1 meter).
The ventilation openings in the device case are not allowed.
It is prohibited:
- disassemble the device case and operate the charger with the top cover removed;
- operate the charger if the power cord is damaged;
- operate in conditions of high humidity, as well as in aggressive environments;
- operate the device near open flames or other sources of thermal radiation;
- operate the charger with closed ventilation openings. The battery charging process should be carried out in a well-ventilated area.
Open the cover at the back of the charger and remove the cords. Set the toggle switch for turning on the automation to the "CHARGE" position.
The "CONTINUOUS-CYCLIC" charge mode toggle switch allows you to select the battery charging modes.
If it is necessary to charge the battery, switch the charge mode toggle switch to the "CONTINUOUS" position.
If it is necessary to form or desulfate the plates, when the capacity of the storage battery decreases, switch the toggle switch for selecting the charge mode to "CYCLIC". Connect the load to the terminals of the storage battery (bulb 12V 6 W).
Connect, observing the polarity, the cord using the clamps to the battery.
The electronic protection of the Kedr-M device against short circuit and incorrect polarity connection is designed in such a way that the charging current appears at the output only if a voltage source (battery) with a voltage of at least 10V is connected to the output terminals.
The lamp connected to the terminals of the charger will not light up, since it is not a voltage source.
Switching between the operating modes of the device "CONTINUOUS-CYCLIC" and "CHARGE-FURTHER CHARGE" can be carried out in the process of charging the battery without disconnecting it from the network.
Connect the plug of the 220 V power cord, and the process of charging the battery begins, as evidenced by the ammeter readings.
The charging current of a fully discharged battery at the beginning of charging can amount to 4 A or more, further in the charging process the current will decrease.
When the battery charge is reached, the charger automatically turns off, as evidenced by the glowing of the "END OF CHARGE" LED
Switch the toggle switch for turning on the automatics in the "DOUBLE CHARGE" mode and continue charging the battery. The battery is considered fully charged if during the charging process the electrolyte density does not change for two hours.
In cyclic charging mode, after every 45 seconds of charging, the battery is discharged for 15 seconds through the load (light bulb) connected to the battery.
In the “CYCLIC” or “DOUBLE CHARGE” position, the automatic equipment is turned off.
Despite the fact that the charger is simple and reliable in operation, in practice there are cases when consumers, due to improper use, cannot obtain the required charging current and mistakenly consider this to be a malfunction of the charger. These errors are summarized in the table.
The charger is intended for charging and restoring the performance of acidic lead 12-volt batteries, partially lost as a result of sulfation and oxidation of electrodes, as well as training them by conducting charge-discharge cycles in order to increase the resource, service life and preservation.
Before using the device, you must study the rules for the care and use of batteries.
- Rated voltage of the supply network, V - 220 ± 11;
- Rated voltage of the rechargeable battery, V -12;
- Charge current nominal, A, not less - 4.0;
- Power consumption, W, no more - 85.
The front panel contains:
- current indicator for monitoring the charge current;
- button for switching on the "AUTOMATIC" mode;
- LED indicating the end of the charge cycle;
- button for switching on the "CYCLE" mode.
The mains supply cord with a plug and the cords for connecting the device to the battery with clips are removed from the rear of the device.
Rice. 1. External view of the charger "Kedr-Auto 4A".
Rice. 2. External view of the charger "Kedr-Auto 12V".
Rice. 3. Schematic diagram of the Kedr-Auto 4A and Kedr-Auto 12V chargers (fuses F2 and F3 are not installed in the Kedr-Auto 12V device).
Tab. 1. List of elements to the schematic diagram of the device "Kedr-4A", "Kedr-12V".
All a Happy New Year! Dear experts, help me figure it out!
The charger for the Cedar 4 car, stopped charging, the voltage is not supplied to the terminals. I myself am not an expert in radio engineering, I checked, looked over and rang out what I could.
The diodes are working, the wires are intact, I think that the problem is in the transformer or the control board of the device.
As an option, I want to try to connect the terminals directly to the transformer (if it is alive) without a control board and a diode bridge, i.e. get at the output of the transformer voltage 14 V required to charge the car battery.
Is that possible?
Activist