Redarc CE25, CE40 Instruction Manual

Charge Equaliser

CE25
CE40

THE CHARGE EQUALISER

The Charge Equaliser operates in a two battery 24V DC negative earth system. The Output
Voltage of the Charge Equaliser is regulated to half the Input Voltage. 12V power is available
from the lower battery in a 24V system via the centre tap (bridging link). The Charge Equaliser
ensures that the voltage across the lower 12V battery (I.e. the battery whose negative is
connected to ground) is equalised to the voltage across the upper 12V battery in the 24V bank.

DISPLAY

There are 2 LEDs on the display; Charge Status and Fault Mode. The LEDs operate as per the
below table.

State Charge Status Fault Mode

Charging Blinking, duty cycle proportional to current Off

Sleep (Batteries Equal) Very short blink Off

Fault Fault code display Fault code display

FAULT CODES

When a fault is recognised by the CE unit, an error code will be fl ashed on both of the LEDs.
The fault codes are defi ned below:

LED State Description

2 fl ash (followed by 2 second off) Over temp fault

3 fl ash (followed by 2 second off) Lower battery under voltage

4 fl ash (followed by 2 second off) Lower battery over voltage

5 fl ash (followed by 2 second off) Upper battery under voltage

6 fl ash (followed by 2 second off) Upper battery over voltage

7 fl ash (followed by 2 second off) Reverse polarity

TURN ON/OFF THRESHOLDS

The unit will turn ON or OFF depending on the below conditions:

• The unit will turn ON when there is more than 0.5V difference between the batteries.

• The unit will turn OFF when the current transfer between the batteries reduces to below 1 Amp.

• The unit will turn OFF after 20 seconds when the upper battery voltage falls below 10.5V.

• The unit will turn OFF instantly when the upper battery voltage falls below 10V.

• The unit will turn OFF when the lower battery voltage falls below 6V.

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