Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Inspection Maintenance and inspection
8 - 2
8.1.3 Daily and periodic inspection
Area of Inspection
Inspection
Item
Description
Interval
Corrective Action at Alarm
Occurrence
Customer’
s
ch
e
c
k
Dail
y
Pe
ri
o
d
ic
Gener
a
l
Surrounding
environment Check the ambient temperature, humidity, dirt,
corrosive gas, oil mist , etc.
✔
Improve environment
Overall unit
Check for unusual vibration and noise.
✔
Check alarm location and retighten
Check for a smear like adhered foreign material
and oil.
✔
Clean
Power supply
voltage
Check that the main circuit voltages are normal.
✔
Inspect the power supply
Main circuit
General
1) Check with megger (across main circuit
terminals and earth (ground) terminal).
✔
Contact the manufacturer
2) Check for loose screws and bolts.
✔
Retighten
3) Check for overheat traces on the parts.
✔
Contact the manufacturer
4) Check for stain
✔
Clean
Conductors,
cables
1) Check conductors for distortion.
✔
Contact the manufacturer
2) Check cable sheaths for breakage
✔
Contact the manufacturer
Transformer/
reactor Check for unusual odor and abnormal increase in
whining sound.
✔
Stop the device and contact the
manufacturer.
Terminal block Check for damage.
✔
Stop the device and contact the
manufacturer.
Smoothing
aluminum
electrolytic
capacitor
1) Check for liquid leakage.
✔
Contact the manufacturer
2) Check for safety valve projection and bulge.
✔
Contact the manufacturer
3)Visual check and judge by the life check of the
main circuit capacitor (Refer to section 8.1.4.)
✔
Relay/
contactor Check that the operation is normal and no chatter is
heard.
✔
Contact the manufacturer
Control circuit/Protectiv
e
circuit
Operation
check
1) Check that the output voltages across phases
with the inverter operated alone is balanced.
✔
Contact the manufacturer
2) Check that no fault is found in protective and dis-
play circuits in a sequence protective operation
test.
✔
Contact the manufacturer
Pa
rt
s
c
h
e
c
k
Overall
1) Check for unusual odor and discoloration.
✔
Stop the device and contact the
manufacture
2) Check for serious rust development.
✔
Contact the manufacturer
Alumi-
num elec-
trolytic
capacitor
1)Check for liquid leakage in a capacitor and defor-
mation trance
✔
Contact the manufacturer
2) Visual check and judge by the life check of the
control circuit capacitor. (Refer to section 8.1.4.)
✔
Cooling system
Cooling fan
1) Check for unusual vibration and noise.
✔
Replace the fan
2) Check for a tight fit of the fan cover.
✔
Insert hooks of the fan cover into the
holes until you hear a click sound.
3) Check for stain.
✔
Clean
Heatsink
1) Check for clogging.
✔
Clean
2) Check for stain.
✔
Clean
Tab. 8-1: Daily and periodic inspection (1)