Current sensor error

¿Qué significa UH ?

Abnormal if the current sensor detects -1.0 A to 1.0 A during compressor operation. This error indicates a potential issue with the current sensor circuit itself or the compressor's wiring. If left unaddressed, it can lead to improper compressor control, reduced efficiency, or even damage due to lack of accurate current feedback.

• Defective Hall-effect current sensor module providing a constant zero-current output despite motor operation.
• Open circuit or high resistance in the current sensor signal wiring to the controller's analog input (e.g., loose terminal block connection).
• Contaminants or corrosion on current sensor terminals causing intermittent or no signal output.
• Faulty analog input channel on the main control board failing to correctly interpret the sensor signal (e.g., AIN1).

Haga clic en los pasos para seguir su progreso.

1. 1

   Safely disconnect power, then measure resistance across current sensor output terminals while compressor is off (expected range 10-100 kOhms typically).

2. 2

   Verify voltage across the current sensor's power supply pins (e.g., 5VDC or 12VDC) when the system is powered on.

3. 3

   Inspect continuity of the current sensor signal wires from the sensor module to the control board's input terminal (e.g., terminal X3-A4).

4. 4

   With an oscilloscope, observe the current sensor's output signal during compressor startup, looking for a valid AC current waveform proportional to load.

5. 5

   Check controller diagnostic registers (e.g., Register 2005) for raw analog input values from the current sensor.