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Hitachi

Hitachi Industrial Equipment Systems Co.,Ltd.

At the point where ease of use meets high performance

Trip monitor

Trip monitor

Protective Functions

Name Cause (s) Trip code
Over-current The inverter output was short-circuited, or the motor shaft is locked or has a heavy load.
These conditions cause excessive current for the inverter, so the inverter output is turned OFF.
The protection circuit operates at approximately 220%(Parameter setting changeable) of the rated output current (ND rated).
E001
Overload protection*1 When a motor overload is detected by the electronic thermal function, the inverter trips and turns off its output. E005
Braking resistor overload protection When the regenerative braking resistor exceeds the usage time allowance or an over-voltage caused by the stop of the BRD function is detected, the inverter trips and turns off its output. E006
Over-voltage protection When the DC bus voltage exceeds a threshold, due to regenerative energy from the motor, the inverter trips and turns off its output. E007
Memory error*2 When the built-in memory element has problems due to noise or excessive temperature, the inverter trips and turns off its output. E008
Under-voltage error*3 A decrease of internal DC bus voltage below a threshold results in a control circuit fault.
This condition can also generate excessive motor heat or cause low torque. The inverter trips and turns off its output.
E009
Current transformer error If a strong source of electrical interference is close to the inverter or abnormal operations occur in the built-in CT, the inverter trips and turns off its output. E010
CPU error*4 When a malfunction in the built-in CPU has occurred, the inverter trips and turns off its output. E011
External trip When a signal to an intelligent input terminal configured as EXT has occurred, the inverter trips and turns off its output. E012
USP error An error occurs when power is cycled while the inverter is in RUN mode if the Unattended Start Protection (USP) is enabled.
The inverter trips and does not go into RUN mode until the error is cleared.
E013
Ground fault*5 The inverter is protected by the detection of ground faults between the inverter output and the motor during power-up tests.
This feature protects the inverter only.
E014
Input over-voltage protection When the input voltage is higher than the specified value, it is detected 100 seconds after power-up and the inverter trips and turns of its output. The overvoltage detection voltage is about 390 VDC (200 V class) and 780 VDC (400 V class) between PN. (Parameter changeable). E015
Instantaneous power failure When power is cut for more than 15ms, the inverter trips and turns off its output.
If power failure continues, the error will be cleared. The inverter restarts if it is in RUN mode when power is cycled.
E016
Temperature detector error The inverter will display the error code shown on the right if the lowering of cooling-fan speed is detected at the occurrence of the temperature error described below. E019
Temperature error due to low cooling-fan speed The inverter will display the error code shown on the right if the lowering of cooling-fan speed is detected at the occurrence of the temperature error described below. E020
Inverter thermal trip When the inverter internal temperature is higher than the specified value, the thermal sensor in the inverter module detects the higher temperature of the power devices and trips, turning off the inverter output. E021
Phase loss input protection*6 One of three lines of 3-phase power supply is missing. Decision time is about 1s.
(When the input phase loss effective function is enabled.
E024
IGBT error*7 When an instantaneous over-current has occurred, the inverter trips and turns off its output to protect main circuit element. E030
Phase loss output protection*8 One of three lines of 3-phase power output is missing. Decision time is about 1s.
(When the output phase loss effective function is enabled.
E034
Thermistor error When the thermistor inside the motor detects temperature higher than the specified value, the inverter trips and turns off its output. E035
Braking error The inverter turns off its output when it can not detect whether the braking is ON or OFF within waiting time after it has released the brake. (When braking function is enabled.) E036
Low-speed overload protection If overload occurs during the motor operation at a very low speed at 0.2 Hz or less, the electronic thermal protection circuit in the inverter will detect the overload and shut off the inverter output.
(Note that a high frequency may be recorded as the error history data.)
E038
Inverter's Overload protection*1 When the inverter itself overload is detected by the electronic thermal function, the inverter trips and turns off its output. E039
Modbus (RS-485) communication error If timeout occurs because of line disconnection during the communication in Modbus-RTU mode, the inverter will display the error code shown on the right. E041
EzSQ invalid instruction This trip occurs when an invalid instruction is detected in EzSQ program. E043
EzSQ Nesting count Error This trip occurs when number of nesting times is exceeded in EzSQ program. E044
EzSQ instruction Error This trip occurs when an can not executed instruction is detected in EzSQ program. E045
EzSQ User Setting Error 0 to 9 These trips occur when a user specified trip instruction is executed in the program. E050 to E059
There is an error in the STO path For more information, please refer to the P1 functional safety guide. E090 to E093
*1
Reset operation is acceptable 10 seconds after the trip. (Overload protection:E005depends on setting.)
*2
Reset operation by reset terminal or STOP / RESET key is not accepted. Since memory element failure or parameter may not be stored correctly, Please initialize memory after turning on the power supply again. And Please re-setting parameters.
*3
Undervoltage error output may take up to about 1sec.
*4
Reset operation by reset terminal or STOP / RESET key is not accepted. Please turn off the power of the inverter.
*5
When the input power supply waveform is distorted, error detection may not be performed correctly.
*6
This protection does not protect the output short circuit, so there is a risk of IGBT damage.
*7
Depending on the state of the output current, it may not be detected correctly.
*8
Inverter repair is necessary when this error occurs. Please contact your service or sales dept.

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