Cause:
Period of instantaneous power failure is longer than the set value [b02], or DC bus
voltage go down to its detecting level while instantaneous power failure.
Remedy:
Get rid of the instantaneous power failure, evaluate the power supply system, set
bigger value for [b02].
Cause:
One of the AC voltage is missing (applied only for 3 phase INV)
Remedy:
Check AC line voltage , check the fuses.
Way to Reset:
A
(5) EEPROM error (E 08)
Phenomena:
Abnormal situation occurs at the memory portion of the frequency inverter due to
incoming noise etc..
Cause:
Influenced by Electrical Magnetic Interference.
Remedy:
Keep such noise source away from the frequency inverter.
Cause:
Ambient temperature is too high.
Remedy:
Take countermeasure against high ambient temperature.
Cause:
Re-power up the frequency inverter short time after power off. It is necessary to
keep several seconds after power off to memorize the current data at EEPROM. If
this time is too short, this storage performance cannot be done and leads to
EEPROM error.
Remedy:
Keep certain time between power off and re-power up.
Cause:
You didn’t wait 6 seconds or more at FACTORY SETTING.
Remedy:
Please try FACTORY SETTING again.
Cause:
RS terminal was keeping “ON” at power off. (If RS is on, INV can not write the
correct data to EPROM at power off, next power on E08 will come out.)
Remedy:
Please don’t use “RS” terminal “ON” at power off.
Cause:
EEPROM is defect.
Remedy:
Change unit.
After you reset the INV, please make sure the parameters especially maximum freq. / Acc /Dec
time / Low limit freq. to prevent any damage.
Way to Reset:
A
or Power off
(6) CPU error (E 11, E 22)
Phenomena:
Abnormal situation or malfunction of micro processor inside frequency inverter.
E 11 :
CPU error from MCU inside core.
E 22 :
CPU error from MCU on I/O board.
E22 is produced by MCU on I/O board and the causes is communication error between ISPM & MCU
on I/O board.
Cause:
Cable (between ISPM and I/O board)was cut. (E22)
Remedy:
Replace the cable.
Cause:
Dusts on the pins of CN2 on I/O board. (E22)
Remedy:
Remove the dusts.
3-3
