20 troubleshooting, Fault messages – Lenze MC3000 Series User Manual

Page 75

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13435743_EDBM301_v14 .0

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20 TROUBLESHOOTING

The table below lists the fault conditions that will cause the drive to shut down, as well as

some possible causes . Please contact the factory for more information on troubleshooting

faults .

NOTE

The drive will not automatically restart after a PWR SAG or a CONTROL

fault . Also, if an OUTPUT fault occurs below 1 .5 Hz, the drive will only

attempt one restart, after a four minute delay . If unsuccessful, it will then

trip into FAULT LOCkOUT, which will require a manual reset . This is

done to protect the drive in case of a shorted motor .

NOTE

In the event of an OVERLOAD fault there is a 3-minute delay before

resetting is possible . This is a requirement of UL508C . This delay is

intended to allow time for the motor to cool . If power is removed when in

an OVERLOAD fault state, when the power is restored the OVERLOAD

fault will still be present and the delay will still be active even if power

was removed for longer than 3 minutes .

FAULT MESSAGES

FAULT

DESCRIPTION

POSSIBLE CAUSES

OUTPUT

Output transistor fault:

Output current exceeded 200% of

drive rating

Phase to ground short .

Phase to phase short .

FX BOOST set too high .

Bad transistor module (IPM) .

LO VOLTS

Low DC Bus Voltage fault:

DC bus voltage below 60% of

normal .

Low line voltage .

HI VOLTS

High DC Bus Voltage fault:

DC bus voltage above 120% of

normal .

High line voltage .

Overhauling load .

DECEL rate is set too fast .

HI TEMP

Temperature fault:

Internal drive temperature too

high .

Ambient temperature too high .

Fan failure (if equipped) .

OVERLOAD

Current Overload fault:

Output current rating exceeded

for too long .

Drive undersized for the

application .

Problem with motor and/or driven

equipment .

PWR TRAN

Power Transient fault:

Low line voltage .

AC line dipped or sagged .

PWR SAG

Power Sag fault:

Control board voltage is below

tolerance .

A new control board has been

installed that is different from the

previous version .

Erratic AC line .

Perform a factory reset using

Parameter 65-PROGRAM .

This will update the software

and allow the fault to be reset .

LANGUAGE

Language fault:

Selected language not present

Defective language EEPROM .

Language EEPROM (U11)

removed after programming .

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