Chapter 6 - Troubleshooting & Maintenance

6.4 Troubleshooting

 

Condition

 

 

Check Point

 

 

 

 

1)

Main circuit inspection

 

 

 

 

 

☞ Input (line) voltage normal? (LED charge lamp on?)

 

 

 

 

 

☞ Motor connected correctly?

 

 

 

 

2)

Input signal inspection

 

 

 

 

 

☞ Input signal to inverter functioning?

 

 

 

 

 

☞ Forward and reverse signals inputted simultaneously to inverter?

 

 

The motor does

 

 

☞ Inverter receiving command input frequency signal?

 

 

 

3)

Parameter setting inspection

 

 

not rotate

 

 

 

 

 

☞ Reverse prevention (FU1-03) function set?

 

 

 

 

 

 

 

 

 

 

☞ Operation mode (FU1-01) set correctly?

 

 

 

 

 

☞ Command frequency set to 0?

 

 

 

 

4) Load inspection

 

 

 

 

 

☞ Load too large, or motor restrained. (Mechanical Brake)

 

 

 

 

5) Other

 

 

 

 

 

☞ Alarm displayed on keypad, or alarm LED lit? (STOP LED blinking?)

 

 

The motor rotates

 

☞ Phase sequence of output terminal U, V and W correct?

 

 

in opposite

 

☞ Starting signal (Forward/Reverse) connected correctly?

 

 

directions

 

 

 

 

 

The difference

 

☞ Reference frequency verified? (Check the level of input signal)

 

 

between the

 

☞ Following parameter setting verified?

 

 

rotating speed and

 

 

Lower Limit Frequency (FU1-24), Upper Limit Frequency (FU1-25), Analog Frequency Gain (I/O-

 

 

the reference is

 

 

1~10)

 

 

too big

 

☞ External noise? (Use a shielded wire)

 

 

The inverter does

 

☞ Acceleration/Deceleration time too short.

 

 

not accelerate or

 

☞ Load too large?

 

 

decelerate

 

☞ Torque Boost (FU1-27, 28) value too high? (Current limit function and the stall prevention

 

 

smoothly

 

 

function verified?)

 

 

The motor current

 

☞ Load too large?

 

 

is too high

 

☞ Torque Boost Value (manual) too high?

 

 

The rotating

 

☞ Upper Limit Frequency (FU1-25) value correct?

 

 

speed does not

 

☞ Load too large?

 

 

increase

 

☞ Torque Boost (FU1-27, 28) value too high? Is Stall prevention function (FU1-59, 60) verified?

 

 

 

 

1)

Load inspection

 

 

The rotating

 

 

☞ Load oscillating?

 

 

speed oscillates

 

2)

Input signal inspection

 

 

when the inverter

 

 

☞ Reference frequency signal oscillating?

 

 

is operating.

 

3)

Other

 

 

 

 

 

☞ Wiring too long? (Over 500m, 1,500ft)

 

94

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Cleveland Range inverter manual Troubleshooting, Condition Check Point
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inverter specifications

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