Daily And Periodic Inspection - Mitsubishi Electric FR-F720-00046 Instruction Manual

6.1.3

Daily and periodic inspection

Inspection Item
Surrounding
environment
General Overall unit
Power supply
voltage
General
Conductors, cables
Main
Transformer/reactor
circuit
Terminal block
Smoothing
aluminum
electrolytic
capacitor
Relay/contactor
Operation check
Control
circuit
protective Overall
circuit
Aluminum
electrolytic
capacitor
Cooling fan
Cooling
system
Heatsink
Air filter, etc.
Indication
Display
Meter
Load
Operation check
motor
*1 It is recommended to install a device to monitor voltage for checking the power supply voltage to the inverter.
*2 One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
Consult us for periodic inspection.
Inspection Item
Check the surrounding air temperature, humidity,
dirt, corrosive gas, oil mist , etc
Check for unusual vibration and noise
Check that the main circuit voltages and control
voltages are normal
*1
(1)Check with megger (across main circuit
terminals and earth (ground) terminal).
(2)Check for loose screws and bolts.
(3)Check for overheat traces on the parts.
(4)Check for stain
(1)Check conductors for distortion.
(2)Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.)
Check for unusual odor and abnormal increase in
whining sound.
Check for damage.
(1)Check for liquid leakage.
(2)Check for safety valve projection and bulge.
(3)Visual check and judge by the life check of the
main circuit capacitor (Refer to page 296)
Check that the operation is normal and no chatter
is heard.
(1)Check that the output voltages across phases
with the inverter operated alone is balanced
(2)Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
(1)Check for unusual odor and discoloration.
(2)Check for serious rust development
(1)Check for liquid leakage in a capacitor and
deformation trance
(2)Visual check and judge by the life check of the
control circuit capacitor. (Refer to page 296.)
(1)Check for unusual vibration and noise.
(2)Check for loose screws and bolts
(3)Check for stain
(1)Check for clogging
(2)Check for stain
(1)Check for clogging
(2)Check for stain
(1)Check that display is normal.
(2)Check for stain
Check that reading is normal
Check for vibration and abnormal increase in
operation noise
Inspection item
Interval
Corrective Action at
Alarm Occurrence
Improve environment
Check alarm location and
retighten
Inspect the power supply
Contact the manufacturer
Retighten
Contact the manufacturer
Clean
Contact the manufacturer
Contact the manufacturer
Stop the device and contact
the manufacturer.
Stop the device and contact
the manufacturer.
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Stop the device and contact
the manufacturer.
Contact the manufacturer
Contact the manufacturer
Replace the fan
Retighten
Clean
Clean
Clean
Clean or replace
Clean or replace
Contact the manufacturer
Clean
Stop the device and contact
the manufacturer.
Stop the device and contact
the manufacturer.
6
295