Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 564 / 608

Inspection Maintenance and inspection
8 - 2
8.1.3 Daily and periodic inspection
A
rea of Inspec
tion
Inspection
Item
Description
Interval
Corrective Action
at Alarm Occurrence Custom-
er’s Check
Daily P
eriodic
햳
Gener
al
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
Power supply
voltage
Check that the main circuit voltages are normal.
햲
✔
Inspect the power supply
M
ain cir
cuit
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
aluminium
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
C
on
tr
ol cir
cuit/P
rot
ec
tiv
e cir
cuit
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
P
ar
ts check
Overall
1) Check for unusual odor and discoloration.
✔
Stop the device and contact the
manufacturer
2) Check for serious rust development.
✔
Contact the manufacturer
Alumin-
ium elec-
trolytic
capacitor
1) Check for liquid leakage in a capacitor and deforma-
tion trance
✔
Contact the manufacturer
2) Visual check and judge by the life check of the con-
trol circuit capacitor. (Refer to section 8.1.4.)
✔
C
ooling sy
st
em
Cooling fan
1) Check for unusual vibration and noise.
✔
Replace the fan
2) Check for loose screws and bolts.
✔
Fix with the fan cover fixing screws
3) Check for stain.
✔
Clean
Heatsink
1) Check for clogging.
✔
Clean
2) Check for stain.
✔
Clean
Tab. 8-1: Daily and periodic inspection (1)