Quick Start 
  Copyright ©ITECH Electronics Co., Ltd.  11 
grounding. Do not use terminal board without protective grounding. Before 
operation, be sure that the power supply is well grounded. 
  To avoid burning out, pay attention to marks of positive and negative 
polarities before wiring. 
 
Self-test steps 
Normal self-test procedures: 
1.  Correctly connect the power cord. Press Power key to start up. 
2.  After self-test, if the power supply is normal, then VFD will 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 or the latest operation data in EEPROM was 
lost, the VFD will display “EEPROM FAIL”. 
  If the last power status in EEPROM is lost, then the VFD will display “SYST 
LOST”. 
  If  the  calibration  data  in  EEPROM  is  lost,  the  VFD  display  the  tooltip 
information “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)  Pull out power line and take out the fuse box at power line jack with a 
small screw driver. As shown below.