STOP
RESET

6–5

L100 Inverter

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

Run

Stop

RUN

 

OFF, or “trips” similar to the way a circuit breaker

 

 

 

trips due to an over-current condition. Most faults

 

STOP

Fault

RESET

occur when the motor is running (refer to the

 

Trip

Fault

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 6–8 (setting B_84=00 will clear the trip history but leave inverter settings intact).

Troubleshooting Maintenance and

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

Name

Cause(s)

 

 

Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E 0 1

Over current event while

The inverter output was short-circuited, or the motor

 

 

at constant speed

shaft is locked or has a heavy load. These conditions

 

 

 

 

 

 

 

cause excessive current for the inverter, so the

 

 

E 0 2

Over current event during

 

 

inverter output is turned OFF.

 

 

deceleration

 

 

 

 

 

 

 

 

 

 

 

E 0 3

Over current event during

The dual-voltage motor is wired incorrectly.

 

 

acceleration

 

 

 

 

 

 

 

 

 

 

 

 

E 0 4

Over current event during

 

 

 

other conditions

 

 

 

 

 

 

 

 

 

 

 

 

E 0 5

Overload protection

When a motor overload is detected by the electronic

 

 

 

thermal function, the inverter trips and turns OFF its

 

 

 

 

 

 

 

 

output.

 

 

 

 

 

 

 

E 0 7

Over voltage protection

When the DC bus voltage exceeds a threshold, due to

 

 

 

regenerative energy from the motor.

 

 

 

 

 

 

 

 

 

 

 

E 0 8

EEPROM error

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.

 

 

 

 

 

 

 

E 0 9

Under-voltage error

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.

 

 

 

 

 

 

 

E 1 1

CPU error

A malfunction in the built-in CPU has occurred, so

 

 

 

the inverter trips and turns OFF its output to the

 

 

E 2 2

 

 

 

 

motor.