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VFD700 AC Drive Getting Started Guide 79
Checking Area
Items
Method
Judgment
Voltage
Voltage of power and control
parts
Using instruments
Meet the
technical
specification
Mechanical parts
noise or vibration
Visual check,
listening
Normal
Whether screws or nuts loose
Retighten loosing
screws or nuts
Normal
Whether they are deformor
broken
Visual check, replace
Normal
Whether colour is changed
because of heating
Visual check and
replace
Normal
Whether there is dirty or
dustattached?
Visual check and
clean
Normal
Power
General
Whether screws or nuts loose
Retighten loosing
screws or nuts
Normal
Whether there is dirty or
dustattached to conductors
Clean
Normal
Power
terminal
Whether they are broken?
Visual check and ask
for service
Normal
Brake resistor
Whether there is smell or
broken insulator because of
heating
Visual check, smell
Normal
Resistance is normal or not
Multimeter
The resistance
should be in
±
10% error
Transformer,
reactor
Unusual vibration or smell?
Visual check,
listening,smelling
Normal
Contactor,
relay
Cracking noise
listening
Normal
Contactors are ok?
Visual check
Normal
Cool
system
Fan
Whether screws loose
Retighten screws
Normal
Whether colour is changed
because of heating
Visual check
Normal
noise or vibration
Visual check,
listening, making the
blades move
Rotating
smoothly
Air flow
channel
Whether the heatsink or
channel is blocked?
Visual check and
clean
Normal