1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00606-100 Rev. D 032619
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY CONTROL CENTER -
MINI DIESEL
TROUBLE SHOOTING
Note
.
The Battery Control Center is built in two layers, the printed circuit board and the relays. The box has been
designed so that nearly ALL trouble shooting can be done without the removal of the printed circuit board. Read
and understand the trouble shooting procedure first before EVER removing the printed board. The printed
circuit board must be removed to repair the relays on the lower level.
Once the outer box cover has been removed, ALL the fuses in the box are located on the printed circuit board
and are easily visible for testing and replacement. The fuses can be checked either visually, or with a test light.
To check the fuses visually: Remove the suspected fuse using the fuse tool supplied in the box and examine for
damage to the fusing element.
To check using a test light: Ground the test light to the test ground terminal, J20, provided on the board. (See
printed circuit board illustration, Figure 1)
:
Check for power on both sides of the fuse. If applicable, make sure Battery Disconnect Relays and
fog light switches, are on when checking fuses.
The Battery Disconnect relay terminals are available at test points on the printed circuit board, making it
unnecessary to remove the board for testing . These test points are located near the left edge of the board and
are labeled. Each "S" terminal is available through a 1/4" spade connector so that the test light can be clipped to
it. There is a ground terminal at the bottom of the group that can be used for a test light ground.
To engage a relay, momentarily apply +12 volts to the "I" terminal, TP1 or TP2, and the "S" terminal, J19 or J21,
is grounded. To open the relay, momentarily apply +12 volts to the "S" terminal and the "I" terminal is grounded.
A push button to test the isolator relay is provided on the board to manually actuate the relay. It is located near
the upper right corner of the board and labeled "AUX START". (See Figure 1) The coach must be unplugged
and the engine and generator need to be off for at least ten minutes, to allow the isolator electronics to turn off
the relay drive. Pressing this button should close the isolator relay, which can be detected by the clicking sound
of the relay.
The converter circuit breakers, which are in parallel, carry the current between the Auxiliary battery and the
converter. If the coach is not being supplied 120 volts AC, the current is flowing from the battery to the
converter. If the coach is being supplied 120 volts AC, the converter is usually charging the batteries and the
current will flow from the converter to the batteries. If there is a fault or overload between the converter and the
batteries, the circuit breakers will open as indicated by the reset buttons being popped out. To reset the
breakers, turn off the 12 loads and push the buttons in until they latch.
Checking Fuses
This ground terminal should never be used for any other
purpose
Checking the Battery Disconnects
Isolator Relay
Circuit Breakers
3
