RUN XT: Service & Maintenance Manual - rev. 2.0
Page 11.6
11.2. HITACHI J100 INVERTER ERROR CODES
The inverter memorizes all the errors detected during operation, in the form of a code which
indicates the cause of the error. The table below lists the error codes and their meaning, as referred
to in chapter 6.
DESCRIPTION CAUSES ERR.
Constant
speed
E1
Deceler. E2
Acceler. E3
Power circuits
protection
A short-circuit on an inverter output or a motor
block causes a high current to flow, generating this
error. If the current or temperature of the principal
components exceeds a preset threshold, the output
is disconnected.
Stop E4
Overload
protection
When the internal thermostat of the inverter detects a motor
overload, the output is disconnected.
E5
Braking resistor
overload
When the external resistor is used too frequently, and an
overvoltage is detected caused by interruption of the BRD
function, the output is disconnected.
E6
Overvoltage
protection
When the voltage exceeds a preset threshold, due to motor
regeneration phenomena, this safety is tripped and the output
is disconnected.
E7
EEPROM error When an error is detected on the EEPROM memory which
stores the working program, the output is disconnected.
E8
Low voltage
protection
A drop in the input voltage below 150-160 V triggers this
error, and the output is disconnected.
E9
CT error When a major noise source is situated near the inverter, or
there is a malfunction in the internal current transducer circuit,
the output is disconnected.
E10
CPU error If a malfunction is detected in the internal CPU, the output is
disconnected.
E11
External shutdown One of the motor thermal cutouts has opened, the inverter has
detected it and disconnected the output.
E12
USP error Appears if the inverter is turned on with the start key pressed
(non in use on Run XT).
E13
Ground short
circuit protection
If one of the inverter phases has a leak or short-circuit to
ground, the output is disconnected.
E14
To display the inverter error codes, follow the instructions below or refer to pages 7-2 and 7-11 of
the inverter manual:
1. Remove the motor guard.
2. Turn on the machine.
3. Repeatedly press the “FUNC” key on the inverter keyboard until “ERR” appears.
4. Press the “1” key to display the last error saved. For each error, three different values are
alternately displayed:
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