IT6700 User manual 
User Manual 
15
3)  Verify that the correct power-line fuse is installed. 
      If the fuse was damaged, please see the table below to replace the fuse for your power 
supply. 
 
Model 
Fuse Specifications(220VAC) Fuse Specifications(220VAC)
IT6723/IT6723B/IT6723C/I
T6723H/IT6723G 
T15AT  250V    T15AT  250V 
IT6724/IT6724B/IT6724C/I
T6724H/IT6724G 
T15AT  250V    Not available 
IT6726H/IT6726G/IT6726V
/IT6726B 
T20AT   250V    Not available 
 
 
4)    How to exchange the fuse 
Open the fuse box: 
Use a screwdriver to push and turn the fuse box on the rear panel of the power supply, 
refer to the below picture. After the fuse box is opened, you can see the fuse in it. Please 
replace with a fuse of the same specification.       
   
When install, use a screwdriver to push and turn the fuse box. Refer to the picture 
below. 
 
 
 
 
3.1.2 System self-check 
After power on normally, the supply will enter self check test first. 
If the power supply is normal, then VFD will display the output voltage and current 
status as below: 
 
 
 
 
About 1 second after power on,If the EEPROM was damaged or the latest operation 
data in EEPROM was lost, the VFD will display as below: 
 
 
 
If the last power status in EEPROM is lost, then VFD will display information (about 1 S) 
as below:   
 
EEPROM  FAIL 
SYST  LOST 
 
0.0V     0.00A