Omron Q2V Series Technical Manual Download

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roubleshooting

7.4 Faults

SIEPCYEUOQ2V01A Q2V Technical Manual

233

Code

Name

Causes

Possible Solutions

oL7

High Slip Braking Overload

The load inertia is too large.

An external force on the load side rotated the motor.

Something is preventing deceleration on the load
side.

•

Decrease deceleration times in

C1-02, C1-04, C1-06, and C1-

08 [Deceleration Times]

for applications that do not use High

Slip Braking.

•

Use a braking resistor to decrease the deceleration time.

The value set in

n3-04 [HSB Overload Time]

is too

small.

•

Increase the value set in

n3-04

•

Connect a thermal overload relay to the motor, and set

n3-04 =

1200 s (maximum value)

Note:

•

The drive detects this fault if the output frequency is constant for longer than

n3-04

•

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oPr

Keypad Connection Fault

The keypad is not securely connected to the
connector on the drive.

Examine the connection between the keypad and the drive.

The connection cable between the drive and the
keypad is disconnected.

•

Remove the keypad and then reconnect it.

•

Replace the cable if damaged.

Note:

•

The drive detects this fault if these conditions are correct:

–

o2-06 = 1 [Keypad Disconnect Detection = Enabled]

–

b1-02 = 0 [Run Comm. Sel 1 = Keypad]

, or the drive is operating in LOCAL Mode with the keypad.

•

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Overspeed

There is overshoot.

•

Decrease

C5-01 [ASR PGain 1]

and increase

C5-02 [ASR

ITime 1]

•

Use

H6-02 to H6-05 [Pulse Train Input Setting Parameters]

adjust the pulse train gain.

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]

If the drive detects the fault at start or in the low
speed range (10% or less) and

n8-57 = 1 [High-

Freq Injection = Enabled]

for PM Control methods,

the high frequency injection gain is too high.

•

Set

E5-xx [PM Motor Parameters]

correctly or do Rotational

Auto-Tuning.

•

Decrease the value of

n8-41 [HFI PoleDet Pgain]

in 0.5 unit

increments.

Note:

Set

n8-41 > 0.0

for IPM motors.

Note:

•

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

F1-08

for longer than

F1-09

•

Do a Fault Reset to clear the fault.

•

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

F1-03 [Overspeed Detection Selection]

Code

Name

Causes

Possible Solutions

Overvoltage

The deceleration time is too short and too much
regenerative energy is flowing back into the drive.

•

Increase the values set in

C1-02, C1-04, C1-06, or C1-08

[Deceleration Times]

•

Connect a dynamic braking option to the drive.

•

Perform Deceleration Rate Tuning.

The acceleration time is too short.

•

Make sure that sudden drive acceleration does not cause the
fault.

•

Increase the values set in

C1-01, C1-03, C1-05, or C1-07

[Acceleration Times]

•

Increase the value set in

C2-02 [Jerk@End of Accel]

•

Set

L3-11 = 1 [Overvolt Supression Select = Enabled]

The braking load is too large.

Connect a dynamic braking option to the drive.

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.

If the drive detects ov in these conditions, the speed
search-related parameters are incorrect.

•

During speed search

•

During momentary power loss recovery

•

When the drive starts again automatically

•

Examine the settings for all speed search related parameters.

•