24
Operation
Operation
Read this section before operation.
Starting procedure
Start the pump by the following procedure.
Open the suction and discharge valves.
Turn on the inverter power.
Push the RUN key to start the pump.
See page 25 for detail.
NOTE
Set the frequency dial to about 10Hz at the start. Increase the drive frequency as necessary in later steps.
Check the rotational direction of the motor.
Clockwise seen from the motor end (positive rotation) is the correct direction.
NOTE
For the pumps with a fanless motor, check output from the pump. Significant output pulsation may be a
sign of reverse motor rotation. Correct motor wiring as necessary.
Expel air from the pump head.
Open an air vent line to expel air while taking in liquid into the pump head. Close the line after the pump
head is filled with liquid.
Check the pump operation for abnormality.
In cold climates, an electric current to the motor can double at the start of operation. This overcurrent re-
sults when gear-oil temperature is too low. Run the pump with no discharge pressure until the oil warms
up.
Turn the frequency dial to a desired position.
Increase a flow to a specified rate. See page 25 for detail.
Use a calibration cylinder to measure discharge capacity.
Repeat measurement. The pump and system are ok when the measured discharge capacity does not
change.
NOTE
Observe the above instructions to keep the optimal operating conditions. If you notice any abnormal or dangerous
conditions, suspend operation immediately and inspect/solve problems. See page 27 "Troubleshooting" or contact us.
2
1
3
4
5
6
7
8