©
2017 Sensata Technologies
Page 68
Operation
4.8 Charge Controller Fan Operation
The charge controller contains two internal cooling fans that are automatically controlled. When
the fans turn on or turn off is determined by the temperature of certain components inside the
charge controller. The charge controller’s fans will come on under the conditions listed below.
Fans run full speed if any of the following abnormal conditions are met:
• the internal transistors (FETs) reach
≥
70°C (158°F), or
• the internal inductor
≥
90°C (194°F), or
• the ambient temperature inside the controller
≥
60°C (140°F).
Once the fans turn on, they continue to run until all of the following conditions are met:
• the internal transistors (FETs) reach <60°C (140°F), and
• the internal inductor <85°C (185°F), and
• the ambient temperature inside the controller <55°C (131°F).
The fans also shut down when the controller is off (PV input power is disconnected or at nighttime),
during a F14 fault (Internal NTC Fault), or a very high destructive temperature on the FETs or
inductor occurs.
Info:
Whenever the charge controller is
fi
rst connected to the battery, the fans start
and run for about 1 second.
Info:
The temperature sensed by the BTS does not determine whether the charge
controller’s fans start or stop.
Info:
The PT-100 delivers full output current (100 amps) in ambient temperatures up to
40°C (104°F). Due to the fan cooling, this level of performance can be achieved in closed
rooms. The PT-100 does remain operational above 40°C (104°F), but the charger output
level is reduced to protect the internal components from overheating (see Figure A-1).
4.9 PowerSave
Operation
To reduce unnecessary power consumption, the front display and the four LED’s around the display
automatically go into PowerSave mode—if there is no fault or button push for 15 minutes. While
in PowerSave mode, the four LED’s around the display turn off and the display turns off except for
the decimal point/period in each segment of the display comes on in sequence (from left to right,
then right to left). This is to give some indication that the PT is still powered and working.
The controller immediately comes out of PowerSave mode when an active fault occurs or the user
pushes either of the two buttons (SELECT or RESET) on the front display of the controller.
Info:
During PowerSave, the charge mode LED’s and AUX LED operate normally and
come on if required. If there is a fault during PowerSave, the display and Fault LED will
come on and stay on as long as the fault is active.
Figure 4-13, Power Save Indication
3
rd
segment
decimal point
2
nd
segment
decimal point
1
st
segment
decimal point