TI5400 GPU-24
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3
Operating Procedures
3.14 – Regulated AC Power
Plugging in with AC Power
When the TI5400 GPU-24 is plugged into ac power, the output is 28.5 volts. This voltage allows the system
to recondition and recharge the vehicle’s battery(s). It is also an optimum voltage for powering avionics and
lighting on most aircraft. The GPU’s ac to dc converter produces continuous amps of dc power depending
on the size of the system.
3.15 – Charging Unit
Plug the unit into a wall socket (60Hz 3-Phase 208 Vac Outlet) to charge the batteries. Until the unit is fully
charged, the LED status will read half or no charge.
If you received this manual with a new GPU.
When the Unit is fully charged the LED indicator should show a single steady green bar. The fan will also
come on at reduced speed. This is normal operation indicating the unit is in standby mode and is ready for
use.
If you own an older GPU and this is a replacement manual.
Under a full charge the LED indicator should show a single steady green bar or the entire LED will be blinking.
The fan will also exhibit ratcheting but will not come on. This is normal operation indicating the unit is in
standby mode and is ready for use.
If the GPU’s cells need to be replaced.
After 12 minutes of ac power input, the unit should be fully charged. If the “Push to Test” button is pressed
and the unit still indicates it is not fully charged then the cells should be replaced.
Figure 3.14.1 Connecting TI5400 GPU-24 to AC
Power Supply
Figure 3.14.2 200-260 3-phase plug
