Originally Posted by larrykay
Sounds like it is working normally.Only when the battery needs a charge wil it go to red and theny cycle back to green. When is is extremely cold, it probably cycles more ofterm...
I checked the factory manual I didn't find anything that matched the description of your situation. I tried to find a PDF of the manual to send you but no luck so I just typed out the information. Sorry for any typos.
Perfect charging..with the latest IUoU - charging technology in 4 stages:
in stage 1 the battery is charged with maximum charging current until the charge end voltage is reached. In stage 2 the voltage is preserved with falling current to bring the battery to maximum as quickly as possible. In stage 3 the voltage is reduced to the maintenance charge. Reduction of the battery voltage in stage 4 causes a reset - and the cycle starts again from the very beginning.
The charging procedure has been checked by BMW motorbikes and approved for use in BMW motorbike batteries. Measurements have shown that this charging method guarantees a long service life together with minimum water consumption. The battery is always fully charged.
Throughout the whole charging and charge maintenance procedure, the system is constantly queried. If a battery error occurs, the charge procedure is interrupted with an optical LED Error display.
There is a practical wall-mounting bracket on the back of the unit.
Description of functions
When the unit is connected to the mains, it proceeds with a self-test and all LED's light up for approx. 2 seconds to indicate that the functions are ready. When a battery is connected up with at least 3.5V residual voltage, the charge starts. The connected battery is tested and the charge status defined; this is shown by the four LED's 0 1/3 2/3 3/3. This is why it can take a few hours for the charge status to be dfined and the battery 3/3 shown even when the battery is fully charged. The battery cannot be overcharged.
The unit has the following displays
LED Power- on
The device is connected to the mains
LED 0 - on
The battery is connected up, the device is in the main charging mode.
LED 0 - flashes:
Unit is de-sulphating mode with de-sulphating loops. If de-sulphating succeeds and current flow is enforced through the battery, the main charge mode continues. If de-sulphating fails, the charge is interrupted and "error" appears.
LED 1/3 - on
Device in main charging mode. Charging current has fallen to 1/3 of the initial value.
LED 2/3 - on
Device in main charging mode. Charging current has fallen to 2/3 of the initial value.
LED 3/3 - on
Battery fully charged. Maintenance charging now takes place. The unit can remain connected up. The battery is maintained by so-called "driving simulation cycles".
LED Error - on
Short-circuit at the charging terminals, battery connected to the wrong poles.
LED Error - flashes
Battery error, charge interrupted. The unit haas reconginised a wrong battery, e.g. 6V or 24V battery, battery is sulphated and revival failed or cell short-circuit.
The unit can revivie sulphated batteries. However, this is impossible via the onboard socket outlet in individual cases. Trials have shown that sulphating can be reverted under certain conditions. The unit proceeds with revival loops and tries to enforce a current flow. If the battery cannot be successfully charged via the onboard electrical circuit's socket outlet after several attempts, then the battery should be directly charged on the battery poles. If revival succeeds, it is followed by normal charging. If revival fails, the battery is irrevocably defect. The unit interrupts the charge and indicates this by the flashing LED Error. In stubborn cases, a second attempt to revive the battery may succeed. Disconnect the defect battery briefly and connect it up again. Then proceed again from the beginning. The unit tests the connected battery and switches to the necessary charging mode.
The unit can be connected up to the battery for a longer period of time (several Months) without any problems and always keeps it fully charged. Overcharging and gassing of the battery is prevented.
In spite of the low charge maintenance voltage, under certian circumstances it is possible for the cells of lead acid batteries to lose slight quantities of water. This why the acid level should be checked at regular intervals (approx. 4 weeks). If a defect occurs during charging or charge maintenance, this is detected and charge is interrupted.