MSP40 / MSP50
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-4883 P. 18 / 18
15. MAINTENANCE
For effective use and longer life of the Mini-Top electronic actuator, regular checking appropriate for its operating conditions
are recommended. Refer to the following table.
ITEM
CHECKING POINT
HOW TO PROCEED
Stem operation
Apply input 0%, 50%, 100%, then back to 50%, 0%.
Check that the actuator operates to the correct posi-
tions at respective input values.
Repair or calibrate the unit.
Abnormal sound
No abnormal sound is heard during operation.
Repair or calibrate the unit.
Water or rust inside
the housing
Check that there is no water or rust inside the hous-
ing.
If there is water inside, check the packing and the
wiring cable connector is not loose.
Remove water and dry the housing and the parts
inside.
Replace rusted parts, if any.
Replace the packing, if damaged.
Re-tighten cable connector, if loose.
Screws
Check that screws and bolts are securely fastened.
Re-tighten them, if loose.
For repair or parts replacement, contact M-System or our representatives.
■
LUBRICATION
There is no need of oiling the Mini-Top electronic actuator in normal operating conditions.
■
REGULAR TEST RUNNING
If the valve is not frequently operated, run a test operation regularly (once a week, for example) to ensure that the actuator
operates normally.
16. TROUBLESHOOTING
TROUBLE
LED
POSSIBLE CAUSE
HOW TO PROCEED
PWR
INP
COM
ALM
Actuator does not
work
(Analog input)
OFF
–
–
–
Power failure
Cable breakage
Check the power supply and cables.
ON
OFF
–
–
Input error
Check the input signal level.
ON
ON
–
–
Mode is set to Manual operation or
Modbus input mode.
Check the operation mode.
ON
ON
–
ON Motor deadlock error
Apply input in reverse direction.
Actuator does not
work
(Modbus input)
ON
–
OFF
Modbus communication is not established. Check the communication cable.
Check the Node address.
Check the baud rate.
ON
–
Blinks
Mode is set to Manual operation or
Analog input mode.
Check the operation mode.
ON
–
ON Motor deadlock error
Clear error via Modbus.
Unstable operation
–
–
–
–
Abnormal power voltage,
Noise
Check power voltage and noise in
input signal.
17. LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protec-
tors for protection against induced lightning surges.
Please consult M-System to choose appropriate models.
