Chapter6 Troubleshooting
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197
Fault Content of checking Corrective measure
direction is
contrary
W
●Adjust parameter value of
P2.25
Whether the connection of
frequency circuit is correct
●Correct the connection
Motor rotate but
can’t shift
Whether the load is too heavy
●Reduce the load or increase
Acc/Dec time
Whether the max output
frequency setting is correct
●Check the setting of
maximum output frequency
Motor’s rotate
speed is too fast
or too low
Use a rectifying voltmeter to
test Whether the voltage drop
between the motor’s terminals
is too much
●Check V/F characteristics
Whether the load is too heavy ●Reduce the load
Whether the load wave ●Reduce waving of the load
Is there any phase loss of
power supply
●Check phase loss of power
supply.
●For single-phase power
supply, connect AC reactor to
power supply
Motor’s rotate
speed isn’t
steady
Whether the frequency-giver is
steady or not
●Check the frequency-giver
Bearings’ abrasion,
lubrication, rotor’s
eccentricity
●Repair the motor
Noise of the
motor is too loud
Whether the carrier-frequency
is too low
●Increase the carrier wave
frequency
Is there any mechanical
resonance
●Adjust the jump frequency
Whether the under-chassis of
the motor is level
●Adjust the under-chassis of
the motor
Vibration of the
motor is too
much
Whether the output of the three
phases is balanceable
●Check output of the ac drive
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