Troubleshooting - SMC Networks MWB 32-UT Series Operation Manual

5. Troubleshooting

Reported failure
Lock unit does not
release. The actuator or
device does not operate.
Lock unit does not
release and the actuator
or device does not
operate smoothly.
Major causes
Air piping is not connected to
the lock unit. Or air supplied
①
to the lock unit is not
adequate for operation.
Solenoid valve connected to
②
the lock unit does not
operate.
Check the lock
unit and
peripheral
Solenoid valve for locking is
equipment.
energized and operated, but
③
air is not supplied from the
solenoid valve.
Air leakage from the manual
④
lock release bolt.
No problems are confirmed
in ① to ④ above, but lock
⑤
is not released even when
air is supplied to the lock
unit.
Driving actuator
①
malfunctions.
Check the
actuator and
Mounting alignment is
peripheral
②
inadequate or affected by
equipment
lateral load.
The rod inserted into the
③
lock unit is distorted or
warped.
Connect piping to the lock unit and supply
0.3MPa or more air.
・Check the power supply to the solenoid
valve
・Check that the wiring of the solenoid
valve is correct.
・Check that the piping of the solenoid
valve is correct.
・Check if air is supplied to the solenoid
valve
・Make sure that the solenoid valve is not
in manual lock state.
No problems are confirmed with above. If
the solenoid valve failure is confirmed,
repair it or replace it.
Check the solenoid valve type. If the
solenoid valve is normal open type which
shuts off air while the solenoid valve is
energised, change it to normal close type
which supplies air while the valve is
energised.
Return the manual lock release bolt to the
locking status. (Air leakage may occur if
the manual lock release bolt is not
returned to the correct lock position and
status)
It is possible that the inside of the lock unit
is broken. Release the lock manually and
replace the lock unit.
If manual cannot be released manually,
replace the product by actuator.
(Do not disassemble or repair. Contact
SMC Sales office.)
・Check the installation and use of the
actuator referring to the operation manual.
Take corrective actions if any
problems are found.
・Repair or replace the actuator if it
malfunctions.
・Align the product and make adjustment.
・ Install a guide to prevent excessive load
from being applied to the cylinder.
・ Modify mounting conditions, change the
support brackets.
・Eliminate the distortion or warp of the rod
during installation or mounting of the rod.
- 19 -
Countermeasures