Using a PT Controller: Troubleshooting
©
2017 Sensata Technologies
Page 147
•
BTS Open-PT
– The BTS has opened or is no longer connected. This fault causes the BTS to
show
305°F/
152°C
on the
TECH: 01F PT Temps
display. With a defective or disconnected BTS,
there is no temperature compensation applied to the battery charging voltage.
Remedy:
Normally when a BTS is connected, it communicates temperature information
to the PT controller. This fault occurs when the PT controller is no longer receiving this
information, which can occur if the BTS cable becomes disconnected or damaged. See
if the BTS cable has fallen out of the BTS port on the PT controller. If still connected,
check for any damage to the BTS cable.
Note:
The fault will automatically clear once a good BTS is reconnected. If the BTS is
determined to be faulty, this fault can be cleared manually by removing the faulty BTS
and pressing the PT controller’s RESET pushbutton for one second.
•
BTS Shorted-PT
– A shorted BTS has been detected. This fault causes the BTS temperature
to show
304°F/151°C
on the
TECH: 01F PT Temps
display. With a defective BTS, there is no
temperature compensation applied to the battery charging voltage.
Remedy:
This can be caused by a shorted BTS cable or debris within the BTS RJ11
terminal. Either remove or replace the BTS (and cable), check the BTS connector to
ensure there are no shorted pins, or check inside the BTS RJ11 terminal for debris.
Note:
If caused by a faulty BTS, the fault automatically clears once the BTS is removed.
•
FET Overtemp-PT
– The internal FETs (Field Effect Transistors) have exceeded their safe
temperature operating range (
≥
185°F/
85
°
C).
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 automatically clears and the unit resumes operation when the FET
temperature has cooled down to 181°F/83°C or below. Manually clear by pressing the PT’s
RESET pushbutton for one second once the FET temperature falls below 185°F/85°C.
•
Ground Fault-PT
– The PT controller turned off because the GFP fuse inside the PT has
opened due to a ground-fault condition.
WARNING:
Conductors that were normally grounded may have become ungrounded
and energized if a ground fault is indicated.
Remedy:
Find and correct the ground-fault condition and replace the GFP fuse. Once
the ground-fault condition is corrected and the GFP fuse is replaced, manually clear this
fault by pressing the PT controller’s RESET pushbutton for one second.
Info:
See the PT owner’s manual for the GFP fuse location and type.
•
HiBatt Temp-PT
– The temperature around the BTS has risen to 131°F/55°C or above.
Remedy:
Check the area where the BTS is located. Ensure that the BTS hasn’t been
placed in a hot area or near a hot device. If the BTS was placed on a battery ensure
the batteries are not overheated. If neither of these are the issue, then remove the
BTS from the BTS port. If the fault clears, replace the BTS. If the fault continues, then
inspect the BTS port for cleanliness and/or have the controller serviced.
Note:
This fault automatically clears and the unit resumes operation when the BTS
temperature has cooled down to 122°F/50°C or below. Manually clear by pressing the
PT’s RESET pushbutton for one second once the BTS temperature falls below 129°F/54°C
.
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