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8 diagnostics, Diagnostics, Stics – DE-STA-CO IM-pAC AC Drive Getting Started Guide User Manual

Page 67: Osti, 8diagnostics

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IM-pAC Getting Started Guide

67

Issue Number: 5

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8

Diagnostics

* The Enable/Reset terminal will not reset an O.Ld1 trip. Use the

Stop/Reset key.

** These trips cannot be reset for 10 seconds after they occur.

Do not attempt to carry out internal repairs. Return a faulty drive to the supplier for repair.

WARNING

Trip code

Condition

Possible cause

UU

DC bus under voltage

Low AC supply voltage

Low DC bus voltage when supplied by an external DC power supply

OV

DC bus over voltage

Deceleration rate set too fast for the inertia of the machine

Mechanical load driving the motor

OI.AC**

Drive output instantaneous over

current

Insufficient ramp times

Phase to phase or phase to ground short circuit on the drives output

Drive requires autotuning to the motor

Motor or motor connections changed, re-autotune drive to motor

OI.br**

Braking resistor instantaneous over

current

Excessive braking current in braking resistor

Braking resistor value too small

O.SPd

Over speed

Excessive motor speed (typically caused by mechanical load

driving the motor)

tunE

Auto tune stopped before

completion

Run command removed before autotune complete

It.br

I

2

t on braking resistor

Excessive braking resistor energy

It.AC

I

2

t on drive output current

Excessive mechanical load

High impedance phase to phase or phase to ground short

circuit at drive output

Drive requires re-autotuning to motor

O.ht1

IGBT over heat based on drives

thermal model

Overheat software thermal model

O.ht2

Over heat based on drives heatsink Heatsink temperature exceeds allowable maximum

th

Motor thermistor trip

Excessive motor temperature

O.Ld1*

User +24V or digital output overload Excessive load or short circuit on +24V output

cL1

Analog input 1 current mode,

current loss

Input current less than 3mA when 4-20 or 20-4mA modes selected

SCL

Serial communications loss time-out Loss of communication when drive is under remote control

EEF

Internal drive EEPROM failure

Possible loss of parameter values

(set default parameters (see Pr 29 on page 60))

PH

Input phase imbalance or input

phase loss

One of the input phases has become disconnected from the

drive (applies to 200/400V three phase drives only, not dual

rated drives)

rS

Failure to measure motors stator

resistance

Motor too small for drive

Motor cable disconnected during measurement

C.Err

SmartStick data error

Bad connection or memory corrupt within SmartStick

C.dAt

SmartStick data does not exist

New/empty SmartStick being read

C.Acc

SmartStick read/write fail

Bad connection or faulty SmartStick

C.rtg

SmartStick/drive rating change

Already programmed SmartStick read by a drive of a different rating

O.cL

Overload on current loop input

Input current exceeds 25mA

HFxx

trip

Hardware faults

Internal drive hardware fault usually a damaged drive