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CHAPTER 8
FAQ and troubleshooting
This section answers frequently asked questions about installing and operating the CoreSense.
Q. On which transformer valve should I install the CoreSense?
A. When selecting an installation location for the CoreSense, you should consider availability,
serviceability and oil flow. Figure 2 “Recommended installation locations” on page 10 of this manual
summarizes the typical installation options.
Q. Will the CoreSense work on the drain valve?
A. Yes, the CoreSense can be installed on the drain valve thanks to its forced convection thermal pump
that will create an oil flow to the sensor. It is designed to work at most locations on a transformer.
Q. The power is connected to the CoreSense, but none of the LEDs are lit?
A. Verify that the proper voltage is applied to the AC line terminal. The power supply will accept 100–
240 V AC (50–60 Hz). Also, check for a blown fuse. If necessary, replace the sensor fuse (see “Replacing
the fuse” on page 45).
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