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SJ300 Inverter
Troubleshooting
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 SJ300 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 condi-
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.
Run Stop
Fault
Tri p
Fault
RUN
STOP
RESET
STOP
RESET
Status
Codes
Inverter Status
Status
Codes
Inverter Status
---.0
Reset
---.5
Run Command active with 0 Hz
speed reference
---.1
Stop
---.6
Starting
---.2
Deceleration
---.7
DC braking
---.3
Constant speed
---.8
Overload restriction
---.4
Acceleration
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 SJ300 will over current trip at
nominally 200% of rated current for models up to
–550xxx;
nominally 180% of rated current for models
–750xxx to –1500xxx.
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.