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4) overvoltage, 5) low voltage – GE Industrial Solutions AF-300 G11 User Manual

Page 103

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7-2

Data subject to change without notice 7/07. © 2007 GE Drives

Overvoltage during

acceleration OU1

(4) Overvoltage

Overvoltage during

deceleration OU2

Overvoltage running at

constant speed OU3

Reduce the supply

voltage to less than the

specified upper limit.

Faulty drive or error

due to noise. Contact

GE Drives.

Is the power supply voltage within the specified value?

Does OU activate when the load is suddenly removed?

Does the main circuit DC link voltage

exceed the protection level?

Does OU alarm activate

when acceleration is

completed?

Can the acceleration

time be prolonged?

Can the deceleration time be prolonged?

Can the amount of load inertia be reduced?

Prolong.

Reduce.

Is the braking device or DC brake function in use?

Inspect the braking method. Contact GE Drives.

Consider using a

braking system or DC

brake function.

Faulty drive control circuit

or error due to noise, etc.

Contact GE Drives.

Is the main circuit DC voltage

(between P-N) higher than the

detection level specified in

Section 6.1.1?

The drive may be faulty.

Contact GE Drives.

Reset and restart

operation.

Does LU activate when

the circuit breaker or

magnetic contactor is

switched on?

Is power transformer

capacity adequate?

Replace the faulty part and

repair the connection.

Has a (momentary)

power failure occurred?

Faulty parts or loose

connection in the power

circuit?

Is there a load requiring

a large starting current
within the same power

distribution group?

Modify power distribution system to

satisfy the specified value.

Low voltage

LU

Is the power supply

voltage within the

specified value?

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

YES

NO

NO

YES

(5) Low voltage