PSN1 / PSN3
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-4857 Rev.10 P. 9 / 9
TROUBLESHOOTING
TROUBLE
POSSIBLE CAUSE
HOW TO PROCEED
Not functioning
Power and/or
input indicator
OFF
Power and/or input signal is not supplied.
Check power and input signals, remove the
causes of malfunction and secure the sig-
nals.
Wiring error.
Check the wiring.
Bad contact.
Check the connector and other connecting
sections.
Fuse melted.
Replace it with a new one.
Power and input
indicator ON
The actuator is in local calibration mode
(SW-8 ON).
Turn SW-8 OFF.
Improper adjustments of full-open/-closed
positions.
Adjust the full-open/-closed positions.
Control PCB damaged.
Repair and calibration.
Motor damaged.
Repair and calibration.
Abnormality in power voltage or input
signal.
Remove the causes of malfunction and
secure the signals.
Unstable functioning
Operating speed is too fast.
Secure the required thrust by slowing.
Power voltage is too low or fluctuating.
Secure the required level of voltage.
Input is unstable.
Check the controller and cables. Eliminate
noise.
Angle sensor is damaged.
Repair and calibration.
Alarm indicator ON
Overload caused by a foreign object caught
in the valve.
Remove the causes of overload.
Actuator mechanism damaged.
Repair and calibration.
Alarm indicator blinking
Motor temperature is abnormally high.
Use the restart limiting timer. Review MV
value from the controller.
Wiring of the temperature sensor is broken
or the connector is detached.
Check the connector and leadwires.
For repair or parts replacement, contact M-System or representatives.
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.
