OSXEC206-EN
Document is subject to change without notice.
NIPPON VALVE CONTROLS, INC.
1-21-19 Meieki minami, Nakamura-ku, Nagoya 450-0003 JAPAN
TEL: 81-52-582-6435
FAX: 81-52-582-6439
5/5
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
MANUAL OPERATION
PRECAUTIONS
• Manual operation should be a temporary operation.
• Be sure to turn off the power before manual operation.
• Actuator may operate for 15 minutes after power
shuts off for ECR-120, and 30 minutes for ECR-360.
When manual operation is required, follow steps
below.
1) Turn manual shaft slowly with a
smooth-jawed wrench.
2) When limit switch leaves from SW setting
cam, actuator's motor starts.
Keep it in that position.
3) In about 30 seconds, motor protect circuit
starts and the motor stops.
Go ahead and operate manually.
THE WAY OF OPERATION
Turn manual shaft slowly with an adjustable wrench.
Before automatic operation, be sure to remove
wrench.
MAINTENANCE
• To prevent electric shock, be sure to turn off the power
when removing the actuator cover.
• Do the routine maintenance at least once in half a
year.
Inspection items
• Confirm operation of opening and closing.
• Confirm that an actuator is not hot excessively.
• Confirm existence of abnormal noise and
vibration during operation.
• Confirm whether screws are loose or not.
• Confirm that water or condensation no remains
in the actuator.
• Turn off the power and check if the valve
operates normally with built-in capacitor.
TROUBLE SHOOTING
Problem
Cause
Solution
Actuator
does not
move.
Faulty wiring. Correct the wiring.
No voltage is
coming.
Check the voltage.
Incorrect
voltage.
When it's burned out by
excess voltage, replace
the actuator.
Short the
circuit, contact
failure.
Review wires and
connection.
Motor is too
old.
Replace the actuator.
Repair in our factory.
Capacitor is
too old.
Replace the capacitor.
Operation is
unstable.
Excess surge
or voltage was
applied.
• Replace the control
board or limit switch.
(Repair in our factory)
• Replace the actuator.
Rainwater
entered the
actuator.
• Dry the inside.
• Replace the actuator.
Added high
harmonics
noise from an
inverter.
Attachment a filter for
each inverter maker
option.
Effect of high
level noise.
Use the shielded wire
and ground the wiring.
Separate signal wire
from power line.
Switch leakage
current is
large.
Current leakage should
be less than 1 mA.
Stop in the
mid position.
Biting of valve
seat.
Manually operate an
actuator and remove a
foreign object.
Overload
protector runs
because of
over-torque.
Motor protection circuit
returns by the signal of
operation of an
opposite direction.
Turn on the power
again.
Received
the alarm
signal.
For more information contact
NIPPON VALVE CONTROLS, INC. for consultation.
Manual shaft
