MultiPlus-II 2x120V 6.2. Special LED indications For the normal LED indications, see the LED Indications [6] chapter. Page 21 Error Indications Problem Cause Solution The charger does not operate. ‘Bulk’ LED flashes and ‘Mains on’ LED illuminates Charger 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). Check your batteries. You can reset the error mode by switching the unit off and back on again. In the standard factory settings the ’Bulk protection’ mode is enabled. The ‘Bulk protection’ mode can be switched off with the help of VEConfigure only.
Charging current excessively high, causing premature absorption phase. Set the charging current to a level between 0.1 and 0.2 times the battery capacity. The battery is not completely charged. Poor battery connection. Check the battery connections. The absorption voltage has been set to an incorrect level (too low). Set the absorption voltage to the correct level. The float voltage has been set to an incorrect level (too low). Set the float voltage to the correct level. The available charging time is too short to fully charge the battery. Select a longer charging time or higher charging current. 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. Reduce the charging current or select the ‘fixed’ charging characteristics. The absorption voltage is set to an incorrect level (too high). Set the absorption voltage to the correct level. The battery is overcharged. The float voltage is set to an incorrect level (too high). Set the float voltage to the correct level. Poor battery condition. Replace the battery. The battery temperature is too high (due to poor ventilation, excessively high environmental temperature, or excessively high charging current).
Improve ventilation, install batteries in a cooler environment, reduce the charging current, and connect the temperature sensor. The charging current drops to 0 as soon as the absorption phase initiates. The battery is over-heated (>50°C) • Install the battery in a cooler environment • Reduce the charging current • Check whether one of the battery cells has an internal short circuit Defective battery temperature sensor Disconnect the temperature sensor. If charging functions correctly after approximately 1 minute, the temperature sensor should be replaced. ‘Mains on’ flashes and there is no output voltage The device is in ‘charger only’ operation and mains supply is present.
The device rejects the mains supply or is still synchronising. Bulk and absorption LEDs flash synchronously (simultaneously). 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. Absorption and float LEDs flash synchronously (simultaneously). The battery temperature, as measured, has an extremely unlikely value. The sensor is probably defective or has been incorrectly connected. The device will remain in normal operation.