AB-6880
22
Inspection and Troubleshooting
WARNING
•
Detach the terminal cover only when wiring the product. Before detaching the terminal cover, be sure to turn off the
power to the product and all the connected devices. After wiring, be sure to reattach the terminal cover.
Failure to do so might cause electric shock.
CAUTION
•
Do not carelessly touch the product when being used to control hot water.
Its temperature becomes high, and you might get burned.
•
Inspect Model FVY5160J according to Table 3.
•
Be sure to check the flow measuring accuracy according to
Flow measuring accuracy
in Table 3. Flow measuring
accuracy is very essential for Model FVY5160J used for energy management, energy-saving application, etc.
Install the Valve Sensor Diagnosis software in your client PC to inspect flow measuring accuracy. This software allows the
client PC to automatically calculate differential pressure measuring accuracy. Note that optional Display Panel or our
engineering tool (Data Setter/PC-MMI) is required for field inspection.
•
Manually open/close valve at least once a month if it is left in inactive state for a long period.
•
Visually inspect the fluid leakage of the valve and the actuator operations every six months. If any of the problems described
in Table 4 are found, take corresponding actions shown in the table.
If your problem is not solved by the corresponding action, please contact Azbil Corporation near you.
Table 3. Inspection items and details
Inspection item
Inspection interval
Inspection detail
Visual inspection
Semiannual
•
Fluid leakage from the gland and the flange face
•
Loosened
bolts
•
Valve and actuator damages
Operating status
Semiannual
•
Unstable open/close operation
•
Abnormal noise and vibration
•
Abnormal differential pressure across valve (Pvin-Pvout) in fully closed/open
position.
Routine inspection
Any time
•
Fluid leakage to the outside
•
Abnormal noise and vibration
•
Unstable open/close operation
•
Valve
hunting
Flow measuring accuracy Any time (annual)
•
Measuring accuracy of differential pressure across valve:
Measure the valve inlet pressure and outlet pressure when they are equal and check
the values measured by the valve sensor. If difference of the values is
±
3 kPa, flow
measuring accuracy satisfies the factory preset accuracy.
Situation of inlet pressure equal to outlet pressure
→
No flow across the valve in open position
e.g, when supply pump is OFF, or when hand valves on the inflow and/or outflow
sides of the valve are/is fully closed.
•
Valve position detecting accuracy:
Ask our salesperson/serviceperson for details.
Note:
Simplified inspection of flow measuring accuracy is illustrated above. For accurate inspection, a reference flow meter is required. Note that
you cannot field-calibrate or field-adjust flow measuring accuracy.
