Yaskawa iQpump Drive User Manual - Manual (Page 156)

6.8 Main Circuit Test Procedure
156 YASKAWA TM.iQp.01 iQpump Drive User Manual
Cooling Fan Fuse
Large Drive units contain a Cooling Fan Fuse. It is located on either the Gate Drive Board (3PCB) or the Tap
Change Board (8PCB). If the Cooling Fan Fuse is open, then the 230/240 VAC cooling fans may be defective.
1. Set a digital multi-meter to the R x 1 scale.
2. Place one lead of the multi-meter on one side of the fuse and place the other lead of the multi-meter on the
other side of the fuse.
3. If the fuse is good, the measured value will be zero ohms.
If the fuse is bad, the measured value will be infinite ohms.
Check Procedure