PROCEEDING TO CHARGE
The LED indicators below are sequenced as they may come on through the course of the program.
POWER ON: LED #1 - Confirms AC power supply to the charger.
HIGH and LOW intensity indication: The"POWER ON" LED #1 will indicate brightly when current is delivered to the battery.
The "POWER ON" LED #1 will reduce intensity to a low level to indicate low power "ECO" mode. This will occur if there is no battery
connected, or when a battery is connected and the program finds itself in the voltage retention test mode or the 'rest' periods of
Maintenance Charge mode.
REVERSE POLARITY PROTECTION: LED #2 - Lights when the battery connections are incorrect. The charger is electronically protected so
no damage will result, and the output will remain disabled until the connections are corrected.
LED #3 SAVE lights If the battery is extremely flat (deep-discharged),
IMPORTANT: If this mode engages read the section VERY FLAT NEGLECTED BATTERIES .
This mode engages if the battery was more than 90% discharged / voltage is below 12.8V. Charge current is automatically adjusted
according to voltage measured .
VERY LOW VOLTAGE SAVE for batteries between 0.6V and 8.8V: Current starts at 200mA and will increase to 325mA depending on charge
progress. If the voltage did not rise above 8.8V within 2 hours, charging will be suspended and the TEST LED #6 (red) will flash, indicating
the battery may have suffered permanent damage or a professional assessment is required.
LOW VOLTAGE SAVE for batteries between 8.9V and 12.8V: Maximum current is set to 0.8A. The battery's charge acceptance is monitored
for unusual behaviour. A healthy LiFePO
4
battery will progress to CHARGE mode within 4 hours, otherwise charging will be suspended and
TEST LED #6 (red) will flash, indicating the battery may have suffered permanent damage or a professional assessment is required.
LED #4 Charge and charge verification
CHARGE: The BULK CHARGE stage delivers a constant current of about 0,8 Amps maximum into the battery, up to a voltage of 14,2 -14,4V.
VERIFICATION: The circuit verifies battery charge level.
If the battery requires further charging the programme reverts to BULK CHARGE for brief periods, delivering a variable current pulse to the
battery. These reversions may occur as many times as is necessary to reduce the battery’s current demand below 200mA at 13,6V (which is
consistent with a battery that has accepted as much charge as its basic condition allows). (see expected Charging time.)
NOTE: For safety reasons there is an overall charge time limit of 48 hours.
VOLTAGE RETENTION TEST: LED #5 flashing
Delivery of current to the battery is interrupted for 12 hours* to allow the program to determine the battery's ability to retain charge. For batteries
with a good state of health LED #5 (green) should continue to flash for the full 12 hours* period. Read the section NOTES ON TEST RESULTS on
reasons for poor test results or how to test a battery that returns a good result but cannot deliver sufficient power once it is returned to service.
MAINTENANCE CHARGE: LED #5 / 6 steady on
For 30 minutes the circuit offers current to the battery within a safe 13,6V voltage limit whilst the result of the voltage retention test is
displayed. If LED #6 (red) indicated the VOLTAGE RETENTION TEST will be repeated. A steady LED #5 (green) indicate the 30 minute float
charge maintenance periods follow and alternate wih the 30 minute REST (no charging) periods until the battery is disconnected. The battery
can draw current as required to support small loads and counter self-discharge.
CHARGE
SAVESAVE
0.8
LED #5 - GREEN: TEST & MAINTAIN
LED #6 - RED: TEST & MAINTAIN
LED #1 - AC POWER (100-240V)
LED #2 - Reverse polarity
LED #3 - SAVE
LED #4 - CHARGE
