Initial Start-Up; Pre-Power Checks - YASKAWA V7 Technical Manual

2.1 PRE-POWER CHECKS

• Verify wires are properly connected and no erroneous grounds exist.
• Remove all debris from the Drive enclosure, such as loose wire clippings, metal shavings, etc.
• Verify all mechanical connections inside the Drive are tight.
• Verify motor is not connected to load.
• Apply input power only after the front cover is in place. DO NOT remove the front cover or Digital
Operator while input power is on.
• Determine the proper control method for the application.
Open Loop Vector Control - Use section 2.2 for startup instructions
Parameter n002 = 1. Open Loop Vector Control method should be used for
most constant torque applications of the Drive. With this control method
there is excellent starting torque and excellent speed regulation. The startup
procedure for this control method is slightly more complicated.
V/f Control - Use section 2.3 for startup instructions
Parameter n002 = 0. V/f control should be used for most variable torque
applications. Variable torque applications would include: fan, blower,
centrifugal pump, and mixers. Generally variable torque loads do not require
high levels of starting torque. V/f control can also be used for some constant
torque loads where starting torque and speed regulation are not critical.
Section 2. INITIAL START-UP
2-1