Trouble Shoot; Error Messages - Possible Cause And Remedy - Hitachi L100 SERIES Service Manual

3. Trouble Shoot

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

(1) Overcurrent 1 (E 01, E 02, E 03, E 04)
Phenomena:
Cause:
Remedy:
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Way to Reset:
Overcurrent for each condition.
E 01 : Overcurrent during constant speed operation.
E 02 : Overcurrent during deceleration.
E 03 : Overcurrent during acceleration.
E 04 : Overcurrent 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
overcurrent should not be detected anymore.
A single-phase power failure (fuse, wire, ...) can cause a shutdown in certain
underload 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.
A
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