Xantrex Technology TC10TB - Manual (Page 17)

Truecharge 10TB Owner’s Manual
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below the 1-amp threshold that would normally trigger the transition to
float mode.
5.2 Charging Sequence Initiation
The Truecharge always begins, or restarts, the above charging sequence
by initiating a bulk charge. If the battery is only slightly discharged, the
Truecharge will quickly switch into absorption mode, then eventually enter
float mode once fully charged. The conditions that will cause the Truecharge
to start, or restart high current bulk charging are as follows.
1. If, due to an external load consuming current or due to internal battery
leakage, the battery terminal voltage falls to 12.5 volts for more than
15 minutes, a new charging cycle will begin.
2. If 21 days have passed since the last charging cycle, a new charging
cycle is automatically begun. This protects against slowly diminishing
capacity that can occur due to normal internal battery leakage.
3. Each time AC power is connected or reconnected, the charging
sequence is restarted.
5.3 Front Panel Indicators
Three front panel charging status lights are provided to allow monitoring of
battery charging status. Referring to charging modes described in section
5.1, the status light functions are as follows.
• Sequential flashing of all three lights for several seconds, when AC
power is first switched on, indicate the automatic initialization procedure
is in progress.
• Yellow “Bulk” status light. Indicates the bulk charging mode is in
progress. Charging current is 8 to 10 amps.
• Yellow “Absorption” status light. Indicates the Truecharge has switched
into absorption mode. Current is 1 to 8 amps.
• Green “Float/Ready” status light. Indicates that batteries are fully
charged, and the Truecharge has switched into float mode. Charging
current drops to a maintenance level of less than 1 amp.
In addition, the status lights also report an automatic safety shutdown code.
• Both “Ready/Float” and “Bulk” lights flash simultaneously. This indicates
that the battery voltage is dangerously high and the Truecharge has
shut down. This condition is generally caused by a poorly regulated engine
alternator, or generator, simultaneously charging the battery.
• “Bulk” light only flashes. This indicates the Truecharge has shut down
due to overheating caused by poor ventilation.