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Copyright © Itech Electronic Co., Ltd. 11
2. After the power selftest, VFD displays the state of voltage and current as
below.
Error Information References
The following error information may occur when an error occurs during Power
On self-test:
About 1second after power on, if the EEPROM was damaged, the VFD will
display (about 1 S):
If the last power status in EEPROM is lost, then VFD will display
information (about 1 S) as below:
If the calibration data in EEPROM is lost, then VFD will display (about 1S)
as below:
If the factory calibration data in EEPROM is lost, and then the VFD will
display(about 1 S) as below:
Exception handling
If the power supply cannot start normally, please check and take measures by
reference to steps below.
1. Check whether the power line is correctly connected and confirm whether
the power supply is powered.
Correct wiring of power line => 2
Incorrect wiring of power line => Re-connect the power line 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 set power voltage of instrument is larger than the power
supply voltage. If set power voltage is 220 V and the supply voltage is 110V,
the power supply cannot start.
4. Check whether the fuse of electronic fuse 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.
OFF
0.000V 0.0000A
EEPROM FAIL
SYST LOST
CAL LOST
FACT LOST
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