LED

LCD

Description

 

Possible Causes

Display

Display

 

 

 

 

 

 

 

 

 

OC

Over Current

 

Defective IGBT (U, V, or W).

 

 

ASD output current greater than

• ASD output to the motor is connected incorrectly.

 

 

F601 setting.

 

 

 

Disconnect the motor and retry.

 

 

 

 

 

 

 

• ASD output phase-to-phase short.

 

 

 

• The ASD is starting into a spinning motor.

 

 

 

Motor/machine jammed.

 

 

 

• Mechanical brake engaged while the ASD is starting or

 

 

 

 

while running.

 

 

 

• Accel/Decel time is too short.

 

 

 

• Voltage Boost setting is too high.

 

 

 

Load fluctuations.

 

 

 

• ASD operating at an elevated temperature.

 

 

 

 

 

*OH

Overheat

 

ASD is operating at an elevated temperature.

 

 

ASD ambient temperature

• ASD is too close to heat-generating equipment.

 

 

excessive.

 

 

 

 

 

 

 

• Cooling fan vent is obstructed (see Mounting the H9

 

 

 

 

ASD on pg. 15).

 

 

 

• Cooling fan is inoperative.

 

 

 

• Internal thermistor is disconnected.

 

 

 

 

 

OJ

Timer

Run-time counter exceeded.

Type Reset required; select Clear run timer.

 

 

 

 

 

*OLI

ASD Overload

 

The carrier frequency is too high.

 

 

Load requirement in excess of

An excessive load.

 

 

the capability of the ASD.

 

 

 

 

 

 

 

• Acceleration time is too short.

 

 

 

• DC damping rate is set too high.

 

 

 

• The motor is starting into a spinning load after a

 

 

 

 

momentary power failure.

 

 

 

• The ASD is improperly matched to the application.

 

 

 

 

 

OLM

Motor Overload

 

V/f parameter improperly set.

 

 

Load requirement in excess of

Motor is locked.

 

 

the capability of the motor.

 

 

 

 

 

 

 

• Continuous operation at low speed.

 

 

 

• The load is in excess of what the motor can deliver.

 

 

 

 

 

*OLR

Resistor

Excessive current at the

Deceleration time is too short.

 

Overload

Dynamic Braking Resistor.

DBR configuration improperly set.

 

 

 

 

 

248

H9 ASD Installation and Operation Manual

Page 256
Image 256
Toshiba H9 operation manual Type Reset required select Clear run timer, Dynamic Braking Resistor