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Trouble
Abnormal sound is
heard.
External leakage is
observed.
*1
*2
Cause
1. Hexagon nut clamping the coil is
loosened.
2. Foreign substances exist on the
internal surface of the pipe or at
the top surface of plunger assy.
3. Fluid pressure exceeds the
specified working pressure.
4. Voltage applied to the coil is not
proper.
1. Pipe is loosened.
2. Hexagon head bolt is loosened.
3. Cover gasket is damaged.
Cause
No electric conduction (trouble with
electric circuit).
Wires of coil not bound proper for
the applied voltage.
Voltage fluctuates widely.
Coil specifications do not match with
the applied voltage.
Coil burned out with abnormal
temperature rise caused by use in
high ambient temperature condition
or in insulated condition, etc.
Electricity is kept conducted.
1. Retighten the nut with the specified
torque
15N・m.
2. Disassemble the product and remove
foreign substances.
If the foreign substances cannot be
removed, replace the cover complete set
and valve complete set.
3. Adjust the fluid pressure to the
appropriate level.
4. Check the voltage.
1. Replace the cover complete set.
2. Retighten it with the specified torque.
3. Replace the cover gasket.
Check the power supply and voltage.
Wire the coil properly for the applied voltage.
If the trouble still exists, replace the coil with
new one.
Adjust the electric circuit to regulate the
voltage within the allowable fluctuation.
Replace the coil with new one proper for the
applied voltage.
Use the product in ambient temperature
lower than that indicated in "2.
Specifications". Additionally, do not insulate
the coil. Under such condition, replace the
coil.
Check the power supply.
16
Remedy
Remedy
■EPDT-247i■
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