AB-6209-U
ACTIVAL is a trademark or registered trademark of Azbil Corporation in Japan or in other countries.
Rev. 6.0 Jun. 2016
AB-6209-U
8
Inspection and Troubleshooting
CAUTION
Do not carelessly touch this product when being used to control hot water. The product temperature is hot, and
you might get burned.
Inspect the ACTIVAL according to Table 1.
Manually open/close the ACTIVAL at least once a month if it is left in inactive state for a long period after installation.
Visually inspect the ACTIVAL (e.g., fluid leakage) every six months. If any of the problems described in Table 2 is 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 1. Inspection items and details
Inspection item
Inspection interval
Inspection detail
Visual inspection
Semiannual
Loosened lock lever of the assembled actuator
Valve and actuator damages
Fluid leakage from the gland/pipe connecting part
Operating status
Semiannual
Unstable open/close operation
Abnormal noise and vibration
Routine inspection
Any time
Abnormal noise and vibration
Unstable open/close operation
Valve hunting
Table 2. Troubleshooting
Problem
Part to check
Action
Valve does not operate smoothly /
valve stops halfway /
valve does not operate at all.
Conditions of the power applied and of the input
signal applied to the actuator.
Wiring condition/disconnected wires of the actuator.
Foreign substance jammed.
Check the power supply and the controller
connected to.
Check the wiring.
Remove foreign substance by manually
opening the valve.
Fluid leaks to the outside of the valve
when the valve is in fully closed
position.
Confirm the mounting procedure referring to the
section
Assembling the valve Model VY5303B
with the actuator Model MY53X0A
.
Dismount and remount the actuator according
to the correct mounting procedure.
The valve vibrates or produces
an
abnormal noise.
Primary pressure condition.
Differential pressure condition.
Control stability.
Reset and adjust the valve inlet/outlet pressure.
Modify control parameter/PID setting of the
controller.
The auxiliary switch of the actuator
does not operate.
Auxiliary switch (cam switch) condition.
Wiring condition/disconnected wires of the actuator.
Redo the cam switch setting.
Check the wiring.
Connecting part between the valve
and actuator vibrates or produces an
abnormal noise.
Lock lever condition of the actuator.
Yoke damages.
Lock the lock lever.
Consult with our sales/service personnel.
Water flowing sound level is too high.
Consult with our sales/service personnel.
The assembled actuator in operation
produces an abnormal noise.
Consult with our sales/service personnel.
