Trouble Shoot; Error Messages - Possible Cause And Remedy - Hitachi SJ100 SERIES Service Manual

3. Trouble Shoot

3-1. Error Messages - Possible Cause and Remedy:

(1) Over current 1 (E 01, E 02, E 03, E 04)
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Way to Reset:
SJ100 has two kinds of detection; CT and Rsh. To resolve the detection at site, check the following
procedure.
1. Connect DOP/DRW.
2. Set F38 INIT DEBG ON. (to access debug mode)
3. Set F22 IPS POWR ALM mode, don't set retry mode.
4. Test run and wait Over Current trip.
5. Set Core address "FBE4" if it's 4kW or less.
5. Set Core address "FBE2" if it's 5.5kW or above.
Over current (CT or Rsh;gate driver IC) for each condition.
E 01 : Over current during constant speed operation.
E 02 : Over current during deceleration.
E 03 : Over current during acceleration.
E 04 : Over current at other condition than above mentioned.
(such as injection brake)
Load changed rapidly.
Eliminate rapid changed in load.
Sort circuit or earth contact (ground fault) in the motor or the motor cable.
Check with Megger. If the motor cable is disconnected from the inverter, the over
current should not be detected anymore.
A single-phase power failure (fuse, wire, ...) can cause a shutdown in certain
under load situations..
Check all these mains phases and the mains fuses, preferably by comparison of
the three (two in case of single phase inverter) mains currents in a steady
operating state.
The motor is switched with a motor contactor during frequency inverter operation.
Switching over the motor is inhibited.
Defect in the power component.
Check the IGBT portion of ISPM.
Rapid acceleration or deceleration.
Set suitable acceleration or deceleration time.
Starting frequency is too high.
Set starting frequency as low as possible.
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