BENSHAW RSi S4 Series, User Manual

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DAILY AND PERIODIC INSPECTION ITEMS
8 - TROUBLESHOOTING & MAINTENANCE
8.5 Daily and Periodic Inspection Items
Daily and Periodic Inspection Items
Inspection
Location
Inspection
Item
Inspection
Period
Inspection Method Criterion
Measuring
Instrument
Daily
1year 2year
All
Environment
Is there any dust?
Is the ambient temperature and humidity
adequate?
O
Refer to the precautions
Temperature:
-10~+40 no freezing.
Humidity:
Under 90% no dew
Thermometer,
Hygrometer,
Recorder
Equipment Is there any abnormal oscillation or noise?
O
Use sight and hearing No abnormality
Input
Voltage
Is the input voltage of the main circuit
normal?
O
Measure the voltage between the
terminals L1/R,L2/S, L3/T
Digital Multi-
Meter/Tester
Main Circuit
All
Are any fixed parts removed?
Are there any traces of overheating at
each component’s cleaning?
O
O
O
Tighten the screws.
Visual check.
No fault
Conductor/
Wire
Is the conductor oxidized?
Is thew ire coating damaged?
O
O
Visual check No fault
Terminal Is there any damage?
O
Visual check No fault
IGBT
Module/
Diode
Module
Check the resistance between each of the
terminals.
O
Undo the VFD connection and
measure the resistance between
R,S,T and U,V,W with a tester.
(Refer ‘How to Check
Power Components”)
Digital
Multi-Meter /
Analog Tester
Smoothing
Capacitor
Is there any liquid coming out?
Is the safety pin out, and is there any
swelling?
Measure the capacitance.
O
O O
Visual check.
Measure with a capacitance-
measuring device.
No fault
Over 85% of the rated
Capacity
Capacitance
Measuring
Device
Relay
Is there any chattering noise during
operation?
Is there any damage to the contact
O
O
Auditory check.
Visual check
No fault
Resistor
Is there any damage to the resistor
insulation?
Is the wiring in the resistor damaged
(open)?
O
O
Visual check.
Disconnect one of the
connections and measure with a
tester.
No fault
Error must be within 10%
of specified resistance
Digital
MultiMeter/
Analog Tester
Control Circuit Protective Circuit
Operation
Check
Is there any unbalance between each
phases of the output voltage?
O
Measure the voltage between the
output terminals U, V and W.
The voltage balance
between the phases for
200V (800V)class is
under 4V (8V).
Digital
Multi-Meter/
Rectifying
Voltmeter
Cooling System
Cooling Fan
Is there any abnormal oscillation or noise?
Is the connection area loose?
O O
Turn OFF the power and turn the
fan by hand.
Tighten the connections.
Must rotate smoothly.
No fault
Display
Meter Is the displayed value correct?
O O
Check the meter reading at the
exterior of the panel
Check the specified and
management values.
Voltmeter/
Ammeter etc.
Motor
All
Are there any abnormal vibrations or
noise?
Is there any unusual odor?
O
O
Auditory, sensory, visual check.
Check for overheat and damage.
No fault
Insulation
Resistor
Megger check (between the output termi -
nals and the ground terminal)
O
Disconnect motor from VFD and
short motor leads together.
Over 5MO
500V class
Megger