AB-6208-U
ACTIVAL is a trademark of Azbil Corporation in Japan or in other countries.
Rev. 6.0 Jun. 2016
AB-6208-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.
●
Manually open/close the product at least once a month if it is left in inactive state for a long period after installation.
●
Inspect the product according to Table 1.
●
Visually inspect the product (e.g., fluid leakage) every six months. If any of the problems described in Table 2 are found,
take corresponding actions shown in the table.
If your problem is not solved by the corresponding action, please contact us.
Table 1. Inspection items and details
Inspection item
Inspection interval
Inspection detail
Visual inspection
Semiannual
Valve and actuator damages.
Fluid leakage from the valve gland/pipe connecting part.
Loosened lock lever of the ACTIVAL mounted onto the valve.
Operating status
Semiannual
Valve unstable open/close operation.
Abnormal noise and vibration.
Routine inspection
Any time
Valve unstable open/close operation.
Abnormal noise and vibration.
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 assembled actuator fully
closes the valve.
Confirm the mounting procedure referring to the
section
Assembling the valve Model VY5302B
with the actuator Model MY53X0A
.
Dismount and remount the actuator according
to the correct mounting procedure.
Valve hunting occurs.
Secondary pressure condition.
Differential pressure condition.
Control stability.
Reset and adjust the valve inlet/outlet pressure.
Modify control parameter/PID setting of the
controller in connection to the assembled
actuator.
The auxiliary switch of the assembled
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 the 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.
