Quick start 
  Copyright © Itech Electronics Co., Ltd.  13 
/*Dimmer 
Number 9/Dimmer function key 
Cancel /return keys 
/High/Auto 
Set the voltage value/ Switch the voltage range 
between high range and Auto range mode
 
/Phase 
Set the frequency /set the phase angle 
/Save 
Recall the setup from internal memory/ Store the 
AC source settings in non-volatile memory. 
Switch the VFD display to be apparent 
power,peak current,active power and power 
factor/entry the menu setup
Enter key, to confirm the number entered and 
trigger button, which is used to trigger 
the List test 
Output on (off) keys, control power output state / 
keypad lock function keys, used to lock the panel 
buttons 
Left and right direction keys, used to set the value, 
to adjust the cursor to the specified location
Up and down keys, used to turnover the item in 
the menu or increase (decrease) the  output 
voltage or current values
 
 
2.4 VFD Indicator Description 
VFD indicator function description as follow: 
OFF 
Output is off 
Prot 
OCP/OVP/OTP/OPP Protection 
Rmt 
The  AC source  is in 
remote mode 
Auto change the voltage 
range 
Dimmer function is enabled
The power supply 
has an error
 
Shift 
Shift button is pressed 
Trig 
Awaiting for a trigger 
signal 
Lock 
Key operation is locked 
 
2.5 Introduction of rear panel 
  Rear panel of IT7321