4-1
Chapter 4. TROUBLESHOOTING
Types of abnormal status
There are four types of abnormal status of the device: Error, alarm, warning, and
information.
Abnormal status can be checked by the loader.
Abnormal status of the device
Description
Error
An error has a significant impact on the operation of this device. If an error occurs,
flow rate measurement stops.
If the problem is caused by a transient failure such as electrical noise, the device may
return to normal after the power is turned off and back on. If not, request repair.
Alarm
An alarm affects the measurement of flow rate.
If an alarm occurs, flow rate measurement continues, but the accuracy of the flow
rate is not guaranteed.
Warning
A warning has a small impact on the measurement of flow rate.
If a warning occurs, digital output remains off when “DO function" is set to “Error
indication output.”
Whether a warning has occurred can be checked with the LED indicator or by the
loader.
If a warning occurs, flow rate measurement continues.
Information
This is not technically an abnormal status. Information is displayed for reference.
Abnormal status can be checked by the loader.
Abnormal status and corrective actions
Type
Er
: Error
Al
: Alarm
Wn
: Warning
Inf
: Information
Automatic recovery ✓ : Yes (when the cause is removed, the abnormal status
indication disappears)
– : No
No. Type
Description
Likely cause
Corrective action
Automatic
recovery
0
Al
Zero point adjustment
error
(correction of more than
±40 % FS)
The zero point was adjusted when
the fluid was moving.
Check that the pipe is full of the
fluid to be measured and that
the fluid is not moving, and try
again.
✓
Wn Zero point adjustment
completed
(correction of more than
±25 % FS)
Inf Zero point adjustment
completed.
(succeeded)
Zero point adjustment succeeded.
–
