Monitoring Trip Events, History, & Conditions; Fault Detection And Clearing - Hitachi L200 Series Instruction Manual

Monitoring Trip Events, History, & Conditions

Fault Detection and Clearing

The microprocessor in the inverter detects a variety
of fault conditions and captures the event, record-
ing 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
Factory Default Settings" on page 6–8
leave inverter settings intact).
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.
Error
Code
E 0 1 Over-current event while
at constant speed
E 0 2 Over-current event during
deceleration
E 0 3 Over-current event during
acceleration
E 0 4 Over-current event during
other conditions
Overload protection
E 0 5
E 0 7 Over-voltage protection
E 0 8 EEPROM error
E 0 9 Under-voltage error
E 1 1 CPU error
E 2 2
(setting B084=00 will clear the trip history but
Name
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.
When a motor overload is detected by the electronic
thermal function, the inverter trips and turns OFF its
output.
When the DC bus voltage exceeds a threshold, due to
regenerative energy from the motor.
When the built-in EEPROM memory has problems
due to noise or excessive temperature, the inverter
trips and turns OFF its output to the motor.
A decrease of internal DC bus voltage below a thresh-
old results in a control circuit fault. This condition can
also generate excessive motor heat or cause low
torque. The inverter trips and turns OFF its output.
A malfunction in the built-in CPU has occurred, so
the inverter trips and turns OFF its output to the
motor.
L200 Inverter
STOP
RESET
Run
RUN
STOP
RESET
Fault
Trip
"Restoring
Cause(s)
6–5
Stop
Fault