TI4200 GPU-24
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3
Operating Procedures
3.15 – Circuit Breaker Switch
The TI5200 GPU-24 comes equipped with a circuit breaker switch on the front faceplate. This switch controls
ac power input only, It does not control the dc output power to the aircraft or vehicle. Whenever the unit is
plugged into an aircraft or vehicle, it is supplying dc power.
Figure 4.2.1 Circuit Breaker Selector Switch
(outlined in blue)
3.14 – Charging Unit
Once you have the fuse set to match the power characteristics of your line cord, you can plug the unit into a
wall socket 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.
Under a full charge the LED indicator should show a single steady green bar or a single green bar blinking.
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 one and a half hours (90 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.
CAUTION
!
The ON/OFF switch located on the faceplate does not control the DC output
power function.
