Drive Date Stamp Information; Date Stamp Location - YASKAWA F7 User Manual

http://www.aotewell.com
Check
24Vdc Cooling Fans
(Heat Sink & Internal)
230/240Vac Cooling Fans
(Heat Sink)
Cooling Fan Fuse

Drive Date Stamp Information

This information is used to determine when a Drive was built to see if it is within its warranty period. The date stamp is located
on the lower right side of the Drive.
Tel: +(86) 755 8660 6182
Aotewell
Table 6.6 Main Circuit Test Procedure (continued)
The Heat Sink & Internal Cooling Fans cool the heat sink as well as the output transistor
modules of the Drive.
1. Conduct a visual inspection to ensure the fan turns freely.
2. If there is no physical evidence that the fan is bad, the fan motor can be checked with a
digital multi-meter.
3. Set the digital multi-meter to the R x 1 scale.
4. Measure across the fan motor terminals. If 0 Ω are measured, conclude that the fan motor is
shorted. If infinite Ω are measured, conclude that the fan motor is burned open.
5. If the fan is not working, then disconnect the fan and apply 24Vdc to the fan to test the motor.
The Heat Sink Cooling Fans cool the heat sink to remove heat from the Drive.
1. Conduct a visual inspection to ensure the fan turns freely.
2. If there is no physical evidence that the fan is bad, the motor can be checked with a digital
multi-meter.
3. Set a digital multi-meter to the R x 1 scale.
4. Measure across the fan motor terminals. If the fan motor is good, the measured value should
be about 500 Ω . If 0 Ω are measured, conclude that the fan motor is shorted. If infinite ohms are
measured, conclude that the fan motor is burned open.
5. If the fan is not working, then disconnect the fan and apply 230/240Vac to the fan to test the
motor.
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 230/240Vac 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 0 Ω . If the fuse is bad, the measured value will
be infinite Ω .
Fig 6.1 Date Stamp Location
Diagnostics & Troubleshooting 6 - 31
Aotewell
Email: Sales@aotewell.com
Procedure
YEA Production
PRD
00.7.22
96 3. 31
INSP2
http://www.aotewell.com
Manufacture Date
Inspector Number