Omron Q2V Series Technical Manual Download

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7.5 Minor Faults/Alarms

244

SIEPCYEUOQ2V01A Q2V Technical Manual

Code

Name

Causes

Possible Solutions

The motor has overheated.

•

Check the load level, acceleration/deceleration time, and motor
start/stop frequency (cycle time).

•

Decrease the load.

•

Increase the values set in

C1-01 to C1-08 [Acceleration/

Deceleration Times]

•

Set

E2-01 [Mot Rated Current (FLA)]

correctly to the value

specified by the motor nameplate.

•

Make sure that the motor cooling system is operating correctly,
and repair or replace it if it is damaged.

•

Adjust

E1-04 to E1-10 [V/f Pattern Parameters]

. For motor 2,

adjust

E3-04 to E3-10

. Decrease the values set in

E1-08 [Mid

A Voltage]

and

E1-10 [Min Output Voltage]

Note:

If the values set in

E1-08

and

E1-10

are too low, the overload

tolerance will decrease at low speeds.

Note:

•

The drive detects this fault if the motor overheat signal input from analog input terminal AI1 or AI2 is more than the fault detection level.

•

If the drive detects this error, the terminal set to

H2-01 to H2-03 = 4 [MFDO Function Select = Alarm]

will activate.

•

If the drive detects this error, it will operate the motor as specified by the stopping method set in

L1-03 [Motor oH AL Reaction Select]

Code

Name

Causes

Possible Solutions

oL3

Overtorque 1

A fault occurred on the machine.

Example: The machine is locked.

Examine the machine and remove the cause of the fault

The parameters are incorrect for the load.

Adjust

L6-02 [Trq Det1 Level]

and

L6-03 [Trq Det1 Time]

Note:

•

The drive detects this fault if the drive output current is more than the level set in

L6-02

for longer than

L6-03

•

If the drive detects this error, the terminal set to

H2-01 to H2-03 = 4 [MFDO Function Select = Alarm]

will activate.

•

Set the conditions that trigger the minor fault using

L6-01 [Trq Det1 Select]

Code

Name

Causes

Possible Solutions

oL4

Overtorque 2

A fault occurred on the machine.

Example: The machine is locked.

Examine the machine and remove the cause of the fault

The parameters are incorrect for the load.

Adjust

L6-05 [Trq Det2 Level]

and

L6-06 [Trq Det2 Time]

Note:

•

The drive detects this error if the drive output current is more than the level set in

L6-05

for longer than

L6-06

•

If the drive detects this error, the terminal set to

H2-01 to H2-03 = 4 [MFDO Function Select = Alarm]

will activate.

•

Set the conditions that trigger the minor fault using

L6-04 [Trq Det2 Select]

Code

Name

Causes

Possible Solutions

oL5

Mechanical Weakening Detection 1

The drive detected overtorque as specified by the
conditions for mechanical weakening detection set
in

L6-08 [MechF Enable]

Do a deterioration diagnostic test on the machine side.

Note:

•

If the drive detects this error, the terminal set to

H2-01 to H2-03 = 4 [MFDO Function Select = Alarm]

will activate.

•

If the drive detects this error, it will operate the motor as specified by the Stopping Method set in

L6-08

Code

Name

Causes

Possible Solutions

Overspeed

There is overshoot.

•

Decrease

C5-01 [ASR PGain 1]

and increase

C5-02 [ASR

ITime 1]

•

Adjust the pulse train gain with

H6-02 to H6-05 [Pulse Train

Input Setting Parameters]

There is an incorrect number of PG pulses set in the
drive.

Set

H6-02 [PI Frequency Scale]

to the pulse train frequency

during 100% reference (maximum motor rotation speed).

The

detection level is set incorrectly.

Adjust

F1-08 [Overspeed Level]

and

F1-09 [Overspeed Delay

Time]

Note:

•

The drive detects this error if the motor speed is more than the value set in

F1-08

for longer than

F1-09

•

If the drive detects this error, the terminal set to

H2-01 to H2-03 = 4 [MFDO Function Selection = Alarm]

will activate.

•

If the drive detects this error, it will operate the motor as specified by the stopping method set in

F1-03 [Overspeed Detection Selection]

Code

Name

Causes

Possible Solutions

Overvoltage

There are surge voltages in the input power supply.

Connect a DC reactor to the drive.

Note:

If you turn the phase advancing capacitors ON and OFF and
use thyristor converters in the same power supply system,
there can be surge voltages that irregularly increase the input
voltage.

The drive output cable or motor is shorted to ground
(the current short to ground is charging the main
circuit capacitor of the drive through the power
supply).

Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.

Re-energize the drive.

The power supply voltage is too high.

Decrease the power supply voltage to match the drive rated
voltage.