YASKAWA TOEPYAIUPW02A U1000 iQpump Drive Quick Start Procedure
U1000 iQpump Drive
Quick Start Procedure
Page 15
of 25
8.7 Pre-Charge Operation
This function is used when the pump system requires a pre-charge before normal operation. Upon start, the drive
will run at a fixed speed for a specified time or until the feedback signal reaches a programmed level and
switches to auto mode operation.
Feedback
0 Hz
Pre-Charge Completed
Pre-Charge Level P4-01
Pre-Charge Frequency P4-02
P4-01 Pre-Charge Level: Specified feedback level to stop pre-charge operation
P4-02 Pre-Charge Frequency: Set desired pre-charge speed
P4-03 Pre-Charge Time: Specified maximum pre-charge operation time
Output
Frequency
Auto Operation
8.8 Thrust Bearing - Submersible Motors
The factory recommends using the Thrust Bearing
function to prevent excess motor wear when using
a submersible motor in combination with the
drive. Enter the minimum motor frequency
in parameter P4-11 to enable this function.
Example:
Minimum motor speed 1800 RPM
1800 RPM ÷ 3600 RPM x 60.0 Hz = 30.0 Hz
Output Frequency
Output Frequenc
y
Time
Thrust
Bearing
Auto/Hand Operation
Turn Off Thrust Bearing Function
(Thrust Frequency Reached)
P4
-1
1 Accel. Time
Thrust Acceleration Time P4-11
(Example 1.0 seconds) Default setting
C1-01 Acceleration Time
Thrust Bearing Frequency P4-12
(Example 30.0 Hz) Default setting
8.9 Auto Operation - Power Down Storage
Set parameter P4-10 = 1 to allow the drive to automatically start after power failure when operated from the HOA keypad. This function
is recommended when operating the drive in remote or unmanned areas.
Warning!
Sudden Movement Hazard. Ensure all personnel remain clear of the motor when P4-10 = 1. Failure to comply may result in
death or serious injury due to sudden equipment movement.
Fine-tune Settings for Pumping Application (continued)
8
STEP
