iTechworld ITECHDCDC40 User manual

User Guide
ITECHDCDC40
In vehicle DC battery charger

Heavy-duty aluminium case and mounting brackets.
Microchip monitoring and control.
Fully automatic high-frequency multi-stage charging
Pulse mode technology that reduces oxidation, evens
electrolyte consistency and minimizes temperate
equating.
Easy push-button charge profile select.
Internal charger temperature monitoring and power
output control.
LED indicators showing the state of charge.
Overcharging, short circuit and temperature protection.
Reverse polarity protection.
Thermal overload protection.
Solar input overload protection.
MPPT solar input.
IP67 is fully waterproof and dustproof.
Power cut memory function: Once selected the charger
will remain on this battery type until it is changed.
The iTECHDCDC40 is a sophisticated multi-stage dual-input
charger. The iTECHDCDC40 utilizes push-button switch
mode to cater for Lead-acid, AGM/GEL, calcium or lithium
batteries.
KEY FEATURES
USER GUIDE

Locate where you are going to install the iTECHDCDC40.
Ensure the iTECHDCDC40 is securely mounted using the
brackets.
Ensure all cabling meets specifications and will not be
exposed to excessive heat/moving parts or abrasion.
If the charger is located in a camper/caravan we
recommend the use of an Anderson style plug between
the tow vehicle and the camper/caravan.
Fit the suitable connectors on either end of the twin core
cables.
TheiTECHDCDC40 has a shared negative internally.
Using twin core wiring between the auxiliary battery and
iTECHDCDC40 connect the red (+) to the (+ blue cable) DC
output terminal (Black Anderson plug) and the black (-)
to the (-)negative on the rear of the iTECHDCDC40. It is
recommended to install a 50Amp circuit breaker/fuse
(not included) on the positive cable between the auxiliary
battery and the iTECHDCDC40. The circuit breaker/fuse
should be located as close as possible to the battery.
The iTECHDCDC40 must be installed by a qualified auto
electrician. Installation of the iTECHDCDC40 will require
twin core wiring and suitable connectors. Anderson plug-
type connectors are supplied in the kit.
Any existing cables used in conjunction with the
iTECHDCDC40 will require checking to ensure the gauge is
correct.
INSTALLATION
USER GUIDE

Using twin core wiring between the main starting battery
and iTECHDCDC40 connect the red (+) to the (+) DC input
terminal (Red Anderson plug) and the black (-) to the (-)
negative on the rear of the iTECHDCDC40. Finally, make
the power connections to the main starting battery of
the vehicle. It is recommended to install a 50Amp circuit
breaker/fuse (not included) on the positive cable
between the starting battery and the iTECHDCDC40. The
circuit breaker/fuse should be located as close as
possible to the battery.
The optional ignition override cable is used for wiring
into the ignition/acc of your vehicle if you have a smart
alternator. This will force DC charge once the ignition is
switched on, lowering the charge cut in voltage to 11.60V
and low voltage cut off to 10.80V.
Check that all connections are secure and tight.
Ensure there are no isolators, breakers, VSR or relays in
life between the iTECHDCDC40 charger and the cranking
battery.
Do not use common earth for the negative connections
of the iTECHDCDC40.
INSTALLATION CONTINUED
USER GUIDE

INSTALLATION CONTINUED
USER GUIDE
*Fuse not included

Start the vehicle and let it idle.
The iTECHDCDC40 will now recognize that there is a
charge being applied to the main starting battery.
Once the main starting battery has reached 13.2v the
charger will begin to charge the aux battery.
The initial default setting is for AGM/GEL batteries.
If you are charging a battery of different chemistry,
simply change the battery type by unplugging the aux
battery, then press the battery type selector button on
the front panel of the iTECHDCDC40 and reconnect the
aux battery.
Once you have selected the new battery type the
iTECHDCDC40 will remain on this battery type until it is
changed. To change battery type the auxiliary battery
must be disconnected from the iTECHDCDC40. This is a
safety feature to stop you accidentally changing the
battery charge profile.
The iTECHDCDC40 will continue to operate even after the
vehicle has been switched off, however, once the main
starting battery falls to 12.4v the iTECHDCDC40 charger
will automatically switch off. If a solar panel is connected
the iTECHDCDC40 will now switch to solar.
DC BATTERY
Once correctly installed, the iTECHDCDC40 is a simple set
and forget system.
OPERATING THE ITECHDCDC40
USER GUIDE

Once your solar panel has been connected to the solar
input section of the iTECHDCDC40 the charger will
transfer to the solar mode when the vehicle is not
running.
The initial default setting is for AGM/GEL batteries.
If you are charging a battery of different chemistry,
simply change the battery type by unplugging the aux
battery, then press the battery type selector button on
the front panel of the iTECHDCDC40 and reconnect the
aux battery.
Once you have selected the new battery type the
iTECHDCDC40 will remain on this battery type until it is
changed.
Solar charging requires a solar input of 16 to 25v.
Your solar panel will need to be unregulated when
connecting to the iTECHDCDC40.
Your solar panel will need to be producing at least 2.5
amps in order to engage charging. If there is not enough
voltage or current (amps) the iTECHDCDC40 will not
charge.
SOLAR INPUT
Once correctly installed, the iTECHDCDC40 has MPPT solar
charging for increased solar efficiency.
OPERATING THE ITECHDCDC40
USER GUIDE

FRONT PANEL INDICATOR LIGHTS
OPERATING THE ITECHDCDC40
USER GUIDE

FRONT PANEL INDICATOR LIGHTS
OPERATING THE ITECHDCDC40
USER GUIDE
DC Charge
Whencharging is from the DC input of the iTECHDCDC40,
the red charging LED will be lit.
DC Charge
When the auxiliary battery is full, the green Full LED will be
lit. The iTECHDCDC40 will now enter maintenance mode
and provide 100mA charging current. It will not return to
the charging mode until the auxiliary battery is drained
down to 13.1Volts. If you want to force start recharging the
aux battery, simply disconnect and reconnect the aux
battery from the iTECHDCDC40.

FRONT PANEL INDICATOR LIGHTS
OPERATING THE ITECHDCDC40
USER GUIDE
Solar Charge
When the aux battery is full, the green Full LED will be lit.
The iTECHDCDC40 will now enter maintenance mode and
provide 100mA charging current. It will not return to the
charging mode until the auxiliary battery is drained down
to 13.1Volts. If you want to force start recharging the aux
battery, simply disconnect and reconnect the aux battery
from the iTECHDCDC40. Please note, the iTECHDCDC40
requires a minimum of 25Watts to maintain solar charge.
Solar Charge
Whencharging is from the DC input of the iTECHDCDC40,
the red charging and solar input LEDs will be lit.

SPECIFICATIONS & WIRING GAUGE
USER GUIDE
D
12.4
13.1

CHARGING SPECIFICATIONS
USER GUIDE
13.2V
12.4V

FAULT FINDING
USER GUIDE
If the iTECHDCDC40 is beeping with no flashing lights,
please check the polarity of your auxiliary battery.
If the iTECHDCDC40 is beeping and the red power LED is
flashing, the iTECHDCDC40 has detected a fault with your
auxiliary battery, please double check your wiring and
electrical connections. It is possible that your battery or
cabling will need to be replaced.
ALARMS