8. MAINTENANCE
For effective use and longer life of the Mini-Top, regular checking appropriate for its operating conditions are recommended.
Refer to the following table.
ITEM
CHECKING POINT
HOW TO PROCEED
Functioning
Apply input 0%, 50%, 100%, then back to 50%, 0%.
Check the actuator operations and positions at each
input value.
Repair or calibration
Abnormal sound
No abnormal sound is heard during operation.
Repair or calibration
Connector
Leadwire
The connector is firmly connected.
No breakdown of leadwires.
The insulation covers are not torn, not bruised.
Repair or calibration
Inside humidity, rust
No condensation. No rust.
If there is water inside, check the packing.
Remove water, dry the case and inside parts.
Replace rusted parts.
If the packing is damaged, replace it.
Screws
Check that screws and bolts are securely fastened.
Re-tighten them.
Nut
Check that the nut at the valve stem is not loose.
Re-tighten it and calibrate.
For repair or parts replacement, contact M-System or representatives.
■
LUBRICATION
There is no need of oiling the Mini-Top 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 check proper functions.
9. TROUBLESHOOTING
TROUBLE
L RUN
L ERR
POSSIBLE CAUSE
HOW TO PROCEED
No
Func-
tion
ON
OFF
Normal communication?
Confirm that the manual operation is possible.
ON
Blink
Baud rate has been changed after the power
supply has been turned on.
Turn the power supply off and on.
OFF
OFF
Power source is turned off or cable broken.
Check the power source and the cables.
—
ON
Station No. and/or Baud rate error detected
when the power supply has been turned on.
Communication error
Correct the Station No. and/or Baud rate setting.
Check noise possibilities.
Check the terminating resistor.
Unstable functioning
Power voltage is low or fluctuating.
Check the power supply.
Position sensor damaged.
Replace the position sensor.
Stopped in the middle of stroke
Slows down in the middle of
stroke
Actuator mechanism is damaged.
Repair.
Overload cause by a foreign object caught in
stroke the valve.
Check the valve.
10. LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protectors for protection against induced lightning surges. Please contact M-
System to choose appropriate models.
MSP4C / MSP5C / MSP6C
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-4862 Rev.1 P. 9 / 9
