HLC-400
HITROL CO., LTD. 6
Safety and
Environment
Failure Check
and Solution
■Precautions for Use
- Do not disconnect the cable during use.
- Do not disconnect the product during use.
- Do not apply high impact to the product.
■Precautions for Wiring
- Make sure to wire contacts correctly. (Refer to Wiring)
- Wire and supply the power to the product after checking the specifications.
- Incorrect power voltage may cause damage to the product.
- Pay attention to prevent electric shock.
■Disposal of Product
- Make sure to separate the PCB and main unit from housing before disposing the products.
No part (ex. Mercury Switch) has influence on the environment, so no special attention is
required.
■Relay contact does not work
- Check whether the LED lamp is on/off.
- Check the cable connection.
- Check the input voltage.
- Check the level sensor wiring cable.
■Controller is normal, but not working
1) Electrode Type Level Switch
- If there is foreign matter or sediment such as lime on the bottom of tank, it may
cause malfunction.
- Too low liquid conductivity can cause malfunction. (ex. Distilled Water)
- When wiring between controller and electrode is far apart, it may cause malfunction.
- Please refer to the cable recommendations between the controller and the sensor for
installation precautions (Page 5).
2) Float Type Level Switch
- Check that the float floats normally.
- Check the signal when the float operates normally.
