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Problem
The charger does not
operate.
'Bulk' LED flashes and
'Mains on' LED illuminates
The battery is not
completely charged.
The battery is
overcharged.
The charging current
drops to 0 as soon as the
absorption phase initiates.
7.2. Special LED indications
(for the normal LED indications, see
'Mains on' flashes and
there is no output voltage
Bulk and absorption
LEDs flash synchronously
(simultaneously).
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MultiPlus-II 12V/24V/48V 3kVA 120V
Cause
MultiPlus-II is in 'Bulk protection'
mode thus, the maximum bulk
charging time of 10 hours is
exceeded.
Such a long charging time could
indicate a system error (e.g. a
battery cell short-circuit).
Charging current excessively high,
causing premature absorption
phase.
Poor battery connection.
The absorption voltage has been
set to an incorrect level (too low).
The float voltage has been set to an
incorrect level (too low).
The available charging time is too
short to fully charge the battery.
The absorption time is too short.
For adaptive charging this can
be caused by an extremely high
charging current with respect to
battery capacity, so that bulk time is
insufficient.
The absorption voltage is set to an
incorrect level (too high).
The float voltage is set to an
incorrect level (too high).
Poor battery condition.
The battery temperature is too high
(due to poor ventilation, excessively
high environmental temperature, or
excessively high charging current).
The battery is over-heated (>50°C)
Defective battery temperature
sensor
section 3.4
[7])
The device is in 'charger only' operation and mains supply is present. The device rejects the
mains supply or is still synchronising.
Voltage sense error. The voltage measured at the voltage sense connection deviates too
much (more than 7V) from the voltage on the positive and negative connection of the
device. There is probably a connection error.
The device will remain in normal operation.
If the "inverter on" LED flashes in phase opposition, this is a VE.Bus
error code (see further on).
Solution
Check your batteries.
You can reset the error mode
by switching off and back on the
MultiPlus-II.
The standard MultiPlus-II factory setting of the 'Bulk
protection' mode is switched on. The 'Bulk
protection' mode can be switched off with help of
VEConfigure only.
Set the charging current to a level between 0.1 and
0.2 times the battery capacity.
Check the battery connections.
Set the absorption voltage to the correct level.
Set the float voltage to the correct level.
Select a longer charging time or higher charging
current.
Reduce the charging current or select the 'fixed'
charging characteristics.
Set the absorption voltage to the correct level.
Set the float voltage to the correct level.
Replace the battery.
Improve ventilation, install batteries in a cooler
environment, reduce the charging current, and
connect the temperature sensor.
• Install the battery in a cooler environment
• Reduce the charging current
• Check whether one of the battery cells has an
internal short circuit
Disconnect the temperature sensor plug in the
MultiPlus-II. If charging functions correctly after
approximately 1 minute, the temperature sensor
should be replaced.
Error Indications
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