Hitachi SJ700D-004L, Instruction Manual

Page: 240 / 288

Chapter 5 Error Codes
5-3
GA.COM
PH.fail
Main.Cir
IGBT
TH
BRAKE
EMR
PH.fail
Name Description
Display on digital
operator
Display on remote
operator
Troubleshooting and corrective action
Reference
page
Gate array
communica-
tion error
If an error occurs in the communication
between the internal CPU and gate array,
the inverter will trip.
Check for the noise sources located near the
inverter.
(Remove noise sources.)
Check whether the communication cable has
been disconnected.
(Check the connectors.)
-
Phase loss
input
protection
When the phase loss input protection has
been enabled (b006 = 01), the inverter will
trip to avoid damage if an phase loss input is
detected. The inverter trips when the phase
loss input continues for about 1 second or
more.
Check for the phase loss power input.
(Check the power supply input wiring.)
Check the MCB and magnetic contactors for poor
contacts.
(Replace the MCB and magnetic contactors.)
-
Main circuit
error (*3)
The inverter will trip if the gate array cannot
confirm the on/off state of IGBT because of
a malfunction due to noise,short or damage
to the main circuit element.
Check for the noise sources located near the
inverter.
(Remove noise sources.)
Check the main circuit element for damage.
Check the output circuit for a short circuit.
(Check the IGBT.)
Check the inverter for abnormality.
(Repair the inverter.)
-
IGBT error
(*5)
If instantaneous overcurrent occurs, the
main circuit element temperature is
abnormal, or the main circuit element drive
power drops, the inverter will shut off its
output to protect the main circuit element.
(After tripping because of this protective
function, the inverter cannot retry the
operation.) Check the output circuit for a short circuit.
(Check the output cables.)
Check for the ground fault or phase loss.
(Check the output cables and motor.)
Check the main circuit element for damage.
(Check the IGBT.)
Check the heat sink for clogging.
(Clean the heat sink.)
-
Phase loss
output
protection
When the phase loss output protection has
been enabled (b141 = 01), the inverter will
trip to avoid damage if an phase loss output
is detected. The inverter can detect an
phase loss when the output frequency is
from 5 Hz to 100 Hz.
Check for the phase loss output.
(Check the output wiring.)
-
Thermistor
error
The inverter monitors the resistance of the
thermistor (in the motor) connected to the
inverter's TH terminal, and will shut off the
inverter output if the motor temperature
rises.
Check whether the motor temperature is high.
(Check the motor temperature.)
Check whether the internal thermistor of the
motor has been damaged.
(Check the thermistor.)
Check whether noise has been mixed in the
thermistor signal.
(Separate the thermistor wiring from other
wirings.)
2-8
4-70
Braking error
When "01" has been specified for the Brake
Control Enable (b120), the inverter will trip
if it cannot receive the braking confirmation
signal within the Brake Wait Time for
Confirmation (b124) after the output of the
brake release signal.
Check whether the brake has been turned on and
off or not.
(Check the brake.)
Check whether the wait time (b124) is too short.
(Increase the wait time [b124].)
Check whether the braking confirmation signal
has been input.
(Check the wiring.)
4-79
Emergency
stop (*4)
If the EMR signal (on three terminals) is
turned on when the slide switch (SW1) on
the logic board is set to ON, the inverter
hardware will shut off the inverter output
and display the error code shown on the
right.
Malfunction due to incoming noise,in case
EMR terminal is not ON.
Check whether an error has occurred in the
external equipment since the emergency stop
function was enabled.
(Recover the external equipment from the error.)
Check for the noise sources located near the
inverter.(Remove noise sources.)
2-8
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.
(2nd electronic thermal control)
(Note that a high frequency may be
recorded as the error history data.)
Check whether the motor load is too high.
(Reduce the load factor.)
-
Modbus
communica-
tion 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. (The
inverter will trip according to the setting of
"C076".)
Check whether the communication speed setting
is correct.
Check whether the wiring distance is appropriate.
(Check the connections.)
4-106
*3 The inverter will not accept reset commands input via the RS terminal or entered by the STOP/RESET key. Therefore, turn off the inverter
power.
*4 The inverter will not accept the reset command entered from the digital operator. Therefore, reset the inverter by turning on the RS
terminal.
*5 The inverter applied for 004 to 110L/H will not accept reset commands input via the RS terminal or entered by the STOP/RESET key.
Therefore, turn off the inverter power.
OL-LowSP
NET.ERR