Troubleshooting
Incorrect contact at the contact and connection
The valve does not perform
the switching operation.
Countermeasures
(Refer to the next page)
Perform troubleshooting with higher possibility based on the failure phenomenon.
Failure phenomenon
Possible causes
Fuse blown out and/or lead wire broken
(2)
(3)
Operation failure
Incorrect wiring
(1)
Leakage from the connecting
port
Coil has burned out.
High voltage or incorrect coil
(6)
Foreign matter caught in the spool valve
Excessive oil supply
(8)
Leakage other than the
connecting port
Lodging of foreign matter
(11)
Directly exposed to water
(7)
(5),(8)
Sealing failure of actuators (such as cylinder)
(9)
(12)
(4)
Sealing failure
Incomplete switch of spool valve
Tightening failure of the mounting screw
(8)
Buzzing noise
(AC coil)
Foreign matter caught in the armature
Worn spool valve
Leakage from the gap
between the manifold base
and valve body
Wear-out of armature
Decline in the power supply voltage
(10)
Continuous buzzing sound is
generated when the power is
supplied.
Broken wire in the coil
(4)
Swollen spool valve
(5)
- 11 -
No.VT325
∗∗
-OMK0002-B
