Hitachi SJ100 SERIES Service Manual page 15

Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
After you reset the INV, please make sure the parameters especially maximum freq. / Acc /Dec
Way to Reset:
(7) CT error (E 10)
Phenomena: When abnormality noise is near the INV or an abnormality (offset level is out of
spec.) occurs on built in CT.
Cause:
Remedy:
Cause:
Remedy:
Way to Reset:
(8) CPU error (E 11, E 22)
Phenomena: Abnormal situation or malfunction of micro processor inside frequency inverter.
E22 is produced by MCU on I/O board and the causes is communication error between ISPM & MCU
Cause:
Remedy:
Cause:
Remedy:
Cause:
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Cause:
Remedy:
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.
Keep certain time between power off and re-power up.
You didn't wait 6 seconds or more at FACTORY SETTING.
Please try FACTORY SETTING again.
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.)
Please don't use "RS" terminal "ON" at power off.
EEPROM is defect.
Change unit.
time / Low limit freq. to prevent any damage.
A or Power off
Influenced by Electrical Magnetic Interference. (such as near contactor on/off)
To Resolve if it's influence, use another power line and don't connect motor wires,
control wires. If no error comes out, resolve noise causes.
CT offset level failure
To Resolve if it's failure, use another power line and power on and check if E10
comes out at power on. If E10 came out , use (replace) another INV(ISPM).
A or Power off
E 11 : CPU error from MCU inside core.
E 22 : CPU error from MCU on I/O board.
on I/O board.
Cable (between ISPM and I/O board)was cut. (E22)
Replace the cable.
Dusts on the pins of CN2 on I/O board. (E22)
Remove the dusts.
Influenced by Electrical Magnetic Interference.
Keep such noise source away from the frequency inverter.
Ambient temperature is too high.
Take countermeasure against high ambient temperature.
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