Red Led: Fault Indication; No Led Indication: Severely Over Discharged; Tips For Optimizing Performance - Valence RT User Manual

8.3 RED LED: Fault Indication

If the LED indicator blinks RED, one of the following has occurred:
• Cell voltage is < 2.45V even after 1 minute of charging.
• Internal electronics' temperature is between 85 and 100 °C.
• If it's red due to an over discharge or self discharge condition and the LED is blinking
slowly (on for 2 seconds, off for 3 seconds), see NOTICE below section 8.4.

8.4 No LED Indication: Severely Over Discharged

If the LED indictor is not blinking and the battery voltage is below 7V:
• Charge with 1A until the lowest cell voltage reaches 2.7V and the LED blinks green. At
this point, use a normal charger (<20A) to charge the battery normally. (see NOTICE
below)
• The individual cell voltages can be viewed with the RT Monitoring and Diagnostic Kit
(Valence part number 1004236).
NOTICE:
If the battery was charged at a higher current than 1A and the lowest cell bank do not reach 2.45V
within one minute, the battery will lock up and flash the slow red flashing state (Red LED on for 2
sec. then off for 3 sec.). Once in this state the battery must be allowed to sit open circuit for
approx. 12 hours or longer depending on battery type (U1 to U27) and the battery voltage. The
overall battery voltage must fall below 5.35V. This is the point when the LED will change from
slow flashing red to fast flashing yellow or no LED at all, before it can be charged with 1A again.
Contact Valence Technology, Inc. or the dealer where the U-Charge
purchased for further information.
9. T
IPS FOR OPTIMIZING PERFORMANCE
By following the tips listed below, you can assure long life and high performance of your
®
U-Charge RT power system:
• Charge all batteries fully prior to first use of the vehicle/device.
• Allow battery to charge fully over night periodically.
• Use at temperatures below 40ºC.
• Charge battery fully and put into Shelf Mode prior to long storage periods.
• Recharge battery fully if it has been stored for more than three (3) months.
• Ensure that all batteries are secured into position to minimize damage from shock and
vibration.
• Periodically inspect electrical connections to ensure screws are tight and no corrosion is
12303 Technology Blvd., Suite 950, Austin, TX 78727, USA
Phone (888) VALENCE or +1 (512) 527-2900, Fax +1 (512) 527-2910
Unit 63 Mallusk Enterprise Park, Mallusk Drive, Newtownabbey, UK
Phone +44(0) 28 9084 5400, Fax +44(0)28 9083 8912
Email: sales@valence.com, Web site: www.valence.com
® RT power system was
Performance may vary depending on, but not limited to cell usage and application.
If cell is used outside specifications, performance will diminish. All specifications
are subject to change without notice. All information provided herein is believed,
but not guaranteed, to be current and accurate. Copyright © 2005-2008 Valence
Technology, Inc.
Revision Date October 2008