PT-100 Manual

© 2017 Sensata TechnologiesPage 78
Maintenance and Troubleshooting

FAULT LED
ON
GFDI Fault - The GFDI fuse in the PT controller has opened due to a ground-fault
condition. Note: If the GFDI detection is not required, set DIP switch 2 to UP.
Remedy: Correct the ground-fault condition and replace the fuse (see
Section 5.5). Once this is done, press the RESET pushbutton for one second
to clear the fault and turn the controller on.
WARNING: Normally grounded conductors may be ungrounded and
energized when a GFDI fault is indicated.

FAULT LED
ON
AFP Fault - Either a series arc has been detected in the PV system, or the arc-
fault test button was pressed showing a successful self test has been performed.
Remedy: If the arc-fault test switch was not pressed, inspect the PV system
for the cause of a series arc-fault. Some causes are loose or corroded wire
connections/terminations, damaged wire strands, or damaged or corroded
connection points inside components in the PV system (i.e., PV modules).
Once the cause has been determined and corrected, press the RESET
pushbutton for one second to clear the fault and turn the controller on.

FAULT LED
ON
Internal NTC Fault - The PT controller turned off because the internal NTC
(Negative Temperature Coeffi cient) temperature sensor suddenly caused a very
large but unexpected temperature change.
Remedy: Press and hold the RESET pushbutton until the display goes thru
a power-up test routine (about 10 seconds). Once the fault has cleared,
verify the controller comes on. If the fault cannot be cleared, there may be
damaged/faulty components inside the controller and it will require repair.

FAULT LED
ON
Internal Hardware Fault - The PT controller turned off to help protect itself
because the redundant hardware protection circuit that monitors the internal
temperature has exceeded a safe operating limit.
Remedy: Press and hold the RESET pushbutton until the display goes thru
a power-up test routine (about 10 seconds). Once the fault has cleared,
verify the controller comes on. If the fault cannot be cleared, there may be
damaged/faulty components inside the controller and it will require repair.

FAULT LED
ON
Inductor Overtemp Fault - The PT controller turned off because the internal
inductor has exceeded its safe temperature operating range (≥132°C/≥270°F).
Remedy: If this fault happens often, ensure the controller is not in a hot
area, has proper ventilation, and the cooling fans inside are working.
Note: This fault will automatically clear and the unit will resume operation
when the inductor temperature has cooled down below 127°C/261°F.
Info: The digital display alternates this fault code (F16) with the inductor
temperature.

FAULT LED
ON
USB Fault - This fault indicates that the USB port on the PT is plugged into a
computer as the unit is attempting to convert power. Note: This fault typically occurs
when a software update is performed and the USB cable hasn’t been unplugged.
Remedy: Ensure there isn’t anything connected to the USB port on the PT-
100, then press and hold the RESET pushbutton for one second. This should
clear the fault and turn the controller on.