Quick Start 
  Copyright © Itech Electronic Co., Ltd.  17 
2.  After selftest, VFD display the output voltage and current status as below: 
 
 
 
 
 
Error Information References 
The following error information may occur when an error occurs during Power 
On self-test: 
⚫  If the EEPROM was damaged, the VFD will display “EEPROM FAIL”. 
⚫  If the last power status in EEPROM is lost, then VFD will display “SYST 
LOST”. 
⚫  If the calibration data in EEPROM is lost, then VFD will display “CAL 
LOST”. 
⚫  If the factory calibration data in EEPROM is lost, and then the VFD will 
display “FACT LOST”. 
Exception handling 
If the power supply can not start normally, please check and take measures by 
reference to steps below. 
1.  Check whether the power cord is correctly connected and confirm whether 
the power supply is powered. 
Correct wiring of power cord => 2 
Incorrect wiring of power cord => Re-connect the power cord and check 
whether the exception is removed. 
2.  Check whether the power in On. Power key is under “ ” On status. 
Yes => 3 
No => Please check the Power key to start power and check whether the 
exception is removed. 
3.  Check whether the fuse of power supply is burned out. 
If yes, change fuse. Detailed steps: 
1)  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. 
   
 
2)  Have a visual inspection of the fuse to see whether it is burnt out; if yes, 
replace  it  with  another  fuse  of  the  same  specification,  for  detailed 
specification, please refer to the chapter Specification. 
 
3)  When install, use a screwdriver to push and turn the fuse box. Refer to 
the picture below.