6-4
6-1 Inspection and Maintenance
6
Inspection and Maintenance
Main
circuit
General
Check that any
parts which may
need tightening
are secure.
Tighten securely. No faults
Check that no part
has indications of
overheating.
Visual inspection No faults
Connection
conductor
and wire
Check that there is
no distortion with
the conductor.
Visual inspection No faults
Check that there is
no damage to the
wire Insulation.
Terminal
block
Check that there is
no damage.
Visual inspection No faults
Inverter unit
Converter
unit
(including
the resistor)
Check the
resistance
between the
terminals.
Disconnect the wiring
of the Inverter main
circuit terminal block
and measure the
resistance levels
between terminals
R/L1, S/L2, T/L3 and
P/+, N/-, and between
U/T1, V/T2, W/T3 and
P/+, N/- in the range
of tester ×
1 .
Refer to
"Checking the
Inverter and
Converter".
Inverter unit
replacement
reference
Start/Stop:
Cycle 10
6
*3
Analog
tester
Smoothing
capacitor
Check that there is
no liquid leakage.
Visual inspection
No faults
Reference of
the replacement
period: 10 years
*2 *3
Capacity
meter
Check that the
safety valve has
not come out and
that there are no
bulges.
Relay
Check that there is
no abnormal
sound during
operation.
Acoustic inspection No faults
Check that there is
no rough surface
on the contact.
Visual inspection No faults
Inspection
part
Inspection
item
Inspection point
Inspection period
Inspection method Criteria Meter
Daily
Periodic
1 year 2 years
*1. The life of the smoothing capacitor depends on ambient temperature.
Refer to "Appendix-2 Product Life Curve" for the replacement reference.
*2. The life of the cooling fan varies depending on the environmental conditions, such as ambient temperature
and/or dust. Check the operation through daily inspections.
*3. The replacement reference (year/cycle) or "
Appendix-2 Product Life Curve" is based on the expected design
life, which is not guaranteed.
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