Error Codes - Hitachi L100 Instruction Manual

6–6

Error Codes

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Monitoring Trip Events, History, & Conditions
An error code will appear on the display automatically when a fault causes the inverter to
trip. The following table lists the cause associated with the error.
Error
Name
Code
E01
Over current event while
at constant speed
E02
Over current event during
deceleration
E03
Over current event during
acceleration
E04
Over current event while
motor is stopped
E05
Overload protection
E07
Over voltage protection
E08
EEPROM error
E09
Under-voltage error
E11
CPU error
E22
E12
External trip
E13
USP
E14
Ground fault
E15
Input over-voltage
E21
Inverter thermal trip
Cause(s)
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.
When a motor overload is detected by the electronic
thermal function, the inverter trips and turns off its
output.
When the DC bus voltage exceeds a threshold, due to
regenerative energy from the motor.
When the built-in EEPROM memory has problems
due to noise or excessive temperature, the inverter
trips and turns off its output to the motor.
A decrease of internal DC bus voltage below a thresh-
old 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.
A malfunction in the built-in CPU has occurred, so
the inverter trips and turns off its output to the motor.
A signal on an intelligent input terminal configured as
EXT has occurred. The inverter trips and turns off the
output to the motor.
When the Unattended Start Protection (USP) is
enabled, an error occurred when power is cycled
while the inverter is in Run Mode. The inverter trips
and does not go into Run Mode until the error is
cleared.
The inverter is protected by the detection of ground
faults between the inverter output and the motor upon
during powerup tests. This feature protects the
inverter, and does not protect humans.
When the input voltage is higher than the specified
value, it is detected 100 seconds after powerup and
the inverter trips and turns off its output.
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 the inverter output off.