Hitachi L300P - Manual (Page 207)

L300P Inverter
T
roub
leshooting
and Maintenance
6–5
Monitoring Trip Events, History, & Conditions
Fault Detection
and Clearing The microprocessor in the inverter detects a
variety of fault conditions and captures the event,
recording it in a history table. The inverter output
turns OFF, or “trips” similar to the way a circuit
breaker trips due to an over-current condition.
Most faults occur when the motor is running (refer
to the diagram to the right). However, the inverter
could have an internal fault and trip in Stop Mode.
In either case, you can clear the fault by pressing
the Stop/Reset key. Additionally, you can clear the
inverter’s cumulative trip history by performing the procedure
“Restoring Factory Default
Settings” on page 6–9 (setting B_84=00 will clear the trip history but leave inverter settings
intact).
Error Status
Codes The conditions at the time of an error provide important clues to help you understand the cause.
The L300P inverter displays a “status at trip point” digit to the right of the decimal point for
some error codes. For example,
E07.2
means Error 7 occurred and the inverter status was
condition # “2” when the error occurred.
Error Codes 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.
Run Stop
RUN
STOP
RESET
Trip
Fault
STOP
RESET
Fault
Status
Codes
Inverter Status
Status
Codes
Inverter Status
---.0
Reset
---.5
f0 stop
---.1
Stop
---.6
Starting
---.2
Deceleration
---.7
DC braking
---.3
Constant speed
---.8
Overload restriction
---.4
Acceleration
---.9
Auto-tuning
Error
Code
Name Probable Cause(s)
E01
Over current event while at
constant speed 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 dual-voltage motor is wired incorrectly.
Note: The L300P will over current trip at
nominally 150% of rated current.
E02
Over current event during
deceleration
E03
Over current event during
acceleration
E04
Over current event during
other conditions DC braking power(A054) is set too high, or a
current transformer error occurred, or a noise
source induced the error.
E05
Overload protection When a motor overload is detected by the
electronic thermal function, the inverter trips and
turns OFF its output.