RUNRACE : Service & Maintenance Manual - rev. 2.0
Page 11.9
11.5. 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 Runrace).
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 8-14 of the
inverter manual:
6. Remove the motor guard.
7. Turn on the machine.
8. Repeatedly press the “FUNC” key on the inverter keyboard until “ERR” appears.
9. Press the “1” key to display the last error saved. For each error, three different values are
alternately displayed:
• The error code.
• Current at the time of the error.
