Fuji Electric FRENIC-Lift LM2A Series User Manual

6-3
Table 6.1 List of Periodic Inspections (Continued)
Check part
Check item
How to inspect
Evaluation criteria
Main circuit
DC link bus
capacitor
1) Check for electrolyte leakage,
discoloration, cracks and swelling
of the casing.
2) Check that the safety valve is not
protruding remarkably.
3) Measure the capacitance if
necessary.
1), 2)
Visual inspection
3) Measure the discharge
time with capacitance
probe.
1), 2)
No abnormalities
3) The discharge time
should not be shorter
than the one specified by
the replacement manual.
Transformer
and reactor
Check for abnormal roaring noise
and odor.
Auditory, visual, and
olfactory inspection
No abnormalities
Magnetic
contactor
and relay
1) Check for chatters during
operation.
2) Check that contact surface is not
rough.
1) Auditory inspection
2) Visual inspection
1), 2)
No abnormalities
Control circuit
Printed
circuit board
1) Check for loose screws and
connectors.
2) Check for odor and discoloration.
3) Check for cracks, breakage,
deformation and rust.
4) Check the capacitors for
electrolyte leaks and deformation.
1) Retighten.
2) Olfactory and visual
inspection
3), 4)
Visual inspection
1), 2), 3), 4)
No abnormalities
Cooling system
Cooling fan
1) Check for abnormal noise and
excessive vibration.
2) Check for loose bolts.
3) Check for discoloration caused by
overheat.
1) Auditory and visual
inspection, or turn
manually (be sure to
turn the power OFF).
2) Retighten.
3) Visual inspection
1) Smooth rotation
2), 3)
No abnormalities
Ventilation
path
Check the heat sink, intake and
exhaust ports for clogging and
foreign materials.
Visual inspection
No abnormalities
Remove dust accumulating on the inverter with a vacuum cleaner. If the inverter is stained, wipe it off with a
chemically neutral cloth.
6.3 List of Periodic Replacement Parts
The inverter consists of many electronic parts including semiconductor devices. Table 6.2 lists replacement parts
that should be periodically replaced for preventive maintenance (use the lifetime judgment function as a guide).
These parts are likely to deteriorate with age due to their construction and properties, leading to the decreased
performance or failure of the inverter.
When the replacement is necessary, consult your Fuji Electric representative.
Table 6.2 Replacement Parts
Part name
Standard replacement intervals
(See Notes below.)
400V/200V class series
DC link bus capacitor
7 years
Electrolytic capacitors on printed circuit
boards
7 years
Cooling fans
7 years
Relay output of control circuit terminals
Refer to Table 2.5.

Fuji Electric FRENIC-Lift LM2A Series Specifications

General

Brand	Fuji Electric
Model	FRENIC-Lift LM2A Series
Category	Inverter
Language	English