Monitoring Trip Events, History, & Conditions - Hitachi L300P Series Instruction Manual

Monitoring Trip Events, History, & Conditions
Fault Detection
The microprocessor in the inverter detects a
and Clearing 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
Settings" on page 6–9
intact).
Error Status
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
Codes
some error codes. For example,
tion # "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.
E01
E02
E03
E04
E05
(setting B_84=00 will clear the trip history but leave inverter settings
Status
Inverter Status
Codes
---.0 Reset
Stop
---.1
---.2 Deceleration
---.3 Constant speed
Acceleration
---.4
Error
Name
Code
Over current event while at
constant speed
Over current event during
deceleration
Over current event during
acceleration
Over current event during
other conditions
Overload protection
Run
Fault
E07.2 means Error 7 occurred and the inverter status was condi-
Status
Codes
---.5
---.6
---.7
---.8
Probable 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.
The dual-voltage motor is wired incorrectly.
Note: The L300P will over current trip at
nominally 150% of rated current.
DC braking power(A054) is set too high, or a
current transformer error occurred, or a noise
source induced the error.
When a motor overload is detected by the
electronic thermal function, the inverter trips and
turns OFF its output.
L300P Inverter
STOP
RESET
Stop
RUN
STOP
RESET
Trip
Fault
"Restoring Factory Default
Inverter Status
Run Command active with 0 Hz
speed reference
Starting
DC braking
Overload restriction
6–5