Yaskawa EUS61501X - Manual (Page 13)

3 Safety Procedure
YASKAWA TOEP YEAOPT 06 YASKAWA AC Drive - G5HHP Power Supply Unit with Charge LED Safety Precautions 13
5.
DISCHARGE PROCEDURE 2: If hazardous voltages remain greater than 50 Vdc on the power supply bus
capacitors after 1 hour, then the Power Supply Unit is defective and may take 8-12 hours or more to discharge.
5.a. Wait overnight or a minimum of 8-12 hours with all power removed from the drive.
5.b. Recheck for hazardous voltages as shown in Figure 6 test points (A), (B), and (C).
5.c. If voltage is reduced to a safe level of less than 50 Vdc on bus capacitors and 0 Vac on 4PCB TB1 then remove
the Power Supply Unit according to STEPS
3. and 4.
WARNING! Safe voltages must always be verified by use of a calibrated multimeter.
Figure 6
Figure 6 Wait 8-12 Hours Then Recheck for Unsafe Voltage
Side View
VDC
Verify less than 50 VDC
< 50 V
+
COM
VDC
Verify less than 50 VDC
< 50 V
+
COM
VAC
Verify 0 VAC
0 V
+
COM
A
B C
Wait 8- 12 hours
minimum, then recheck
for unsafe voltages.
WARNING
Risk of Electric Shock - Do Not Touch
The internal capacitor remains charged
after the power supply is turned off.
Disconnect all power to the drive before
servicing.
Wait until the status indicator LED is off,
and then measure DC bus voltage to
confirm a safe level below 50 Vdc before
servicing. The charge indicator LED will
extinguish when the DC bus voltage is
below 50 Vdc.
Failure to comply can result in serious
injury or death from electric shock.
MASS: 3.1 Kg
POWER SUPPLY UNIT
CODE NO.:
SER NO. : N4WXXXX-X-X
LOT NO.:
YASKAWA ELECTRIC CORPORATION EUS6150XX