[SM-215164-A/2]
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TROUBLE SHOOTING
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7. TROUBLE SHOOTING
Motion troubles
Suspected cause
Remedies
Does not actuate
No electric signals
Turn on the power
Damage to signal wiring system
Repair the control circuit
Excessive fluctuating range of current or volt-
age
Reaffirm the power capacity.
(within
±
10% of voltage fluctuation)
Malfunctions
Excessive leaking current
Correct control circuit and / or set a bleed cir-
cuit
Chattering
Inspect switching system and / or tighten each
loosen terminal screw
Voltage deviates than specified on the name
plate
Rectify the voltage to meet the specification
Damaged or short circuited coil
Replace the coil
Erroneous shut off pressure source
Turn on the power source
Insufficient pressure
Reset the pressure reducer valve or install a
pressure raising valve
Insufficient flow of fluid
Rectify the size of pipe or install a surge tank
Pressure supplied through exhaust port
Change the piping to an external pilot system
Erroneous piping, erroneous omitting some
piping
Rectify the piping system
Speed control valve completely closed by error
Reset the needle valve
A port B port is directly released to an open air
Install pipe joints to A and B ports with diame-
ter equal to or smaller than that of to P port
joint
Valve is frozen
Add remedies of avoiding freezing
(Heating system or dehumidifying system etc.)
Delayed return of a plunger
(Excessive oil, existence of far)
Check the quality of the lubricant
(Turbine oil type1, ISO VG 32 or equivalent)
Rectify the quantity of lubricant drip
Install a tar removing filter
Clogged-up exhausting port with dust
Install a cover or silencer and clean it regularly
High actuating
pressure
is required
Bulged or decomposed packings
Check the quality of the lubricant
(Turbine oil type1, ISO VG 32 or equivalent)
Relocate the valves away from splashing area
of cutting coolant
Keep organic chemicals away from valves.
Release of A and / or B port to an open air di-
rectly
Check the piping. Apply more grease.
Foreign particles cut into packing lips
Remove the foreign particle away from the
packing
Malfunctions
when manifold
is used
Delayed response when multiple blocks are
used
Install Sup. (P) piping to P ports on both sides
of manifold block
Connect Exh. (R) piping to R ports on both
sides of manifold block so as to exhaust to an
open air through
Adjacent cylinder pops out
(3-way, single acting cylinder)
Rewire to have the solenoid valve in question is
actuated prior to others sequentially.
Install a locking system to the cylinder
