AB-5961
14
Inspection and Maintenance
Since Models HTY78X3, HY78X3, and TY78X3 series are factor-inspected and -calibrated for high accuracy, no field calibration
is necessary when these products are installed. For inspection and maintenance, follow the maintenance instructions below:
Periodic inspection
Periodically inspect these products for its sensing accuracy. Set the period between inspections based on how much
atmospheric dust and other contaminants are contained in the installation environment.
Check that if the filter is clogged with dust and other contaminants, and clean the filter.
Troubleshoot
If any problem occurs during operation, refer to the following table for appropriate solutions.
Troubleshooting
Problems Check
points
Solutions
Loose wiring
Tighten the terminals.
Disconnected wiring
Re-perform wiring.
Power supply voltage
●
No output
●
Unstable output
Duct sensor main unit damages
Replace the duct sensor.
Slow response to output
Moisture/condensation on the duct sensor
1. Detach the duct sensor from the bracket.
2. Remove the filter cap and the filter.
3. Air-dry the duct sensor in a clean air.
Inappropriate installation location
Refer to
Installation
section and check if the installation
location meets the requirements.
Clean the filter.
Replace the filter.
Perform single-point calibration.
Error in output
Dust and contamination on the duct sensor
main unit
Replace the duct sensor.
Filter replacement
WARNING
Before wiring and maintenance, be sure to turn off the power to the product.
Failure to do so might cause electric shock.
IMPORTANT:
Do not to touch the print board and other parts when these are not covered by the filter cap or the filter.
Doing so might damage these parts.
