Troubleshooting - CKD MN4KB2 Series Instruction Manual

7. TROUBLE SHOOTING
Motion troubles
Does not actuate
Malfunctions
High actuating
pressure
is required
Malfunctions
when manifold
is used
Suspected cause
No electric signals
Damage to signal wiring system
Excessive fluctuating range of current or volt-
age
Excessive leaking current
Chattering
Voltage deviates than specified on the name
plate
Damaged or short circuited coil
Erroneous shut off pressure source
Insufficient pressure
Insufficient flow of fluid
Pressure supplied through exhaust port
Erroneous piping, erroneous omitting some
piping
Speed control valve completely closed by error
A port B port is directly released to an open air
Valve is frozen
Delayed return of a plunger
(Excessive oil, existence of far)
Clogged-up exhausting port with dust
Bulged or decomposed packing
Release of A and / or B port to an open air di-
rectly
Foreign particles cut into packing lips
Delayed response when multiple blocks are
used
Adjacent cylinder pops out
(3-way, single acting cylinder)
Turn on the power
Repair the control circuit
Reaffirm the power capacity.
(within ±10% of voltage fluctuation)
Correct control circuit and / or set a bleed cir-
cuit
Inspect switching system and / or tighten each
loosen terminal screw
Rectify the voltage to meet the specification
Replace the coil
Turn on the power source
Reset the pressure reducer valve or install a
pressure raising valve
Rectify the size of pipe or install a surge tank
Change the piping to an external pilot system
Rectify the piping system
Reset the needle valve
Install pipe joints to A and B ports with diame-
ter equal to or smaller than that of to P port
joint
Add remedies of avoiding freezing
(Heating system or dehumidifying system etc.)
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
Install a cover or silencer and clean it regularly
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.
Check the piping. Apply more grease.
Remove the foreign particle away from the
packing
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
Rewire to have the solenoid valve in question is
actuated prior to others sequentially.
Install a locking system to the cylinder
−34−
７
TROUBLE
SHOOTING
Remedies
[SM-213928-A/2]