82
Locat
ion
Inspection
item
Check item
Check
frequency
Check method
Test criteria
Instrument
Operation
checks
(1) Check output line
voltage balance
between phases
during inverter
operation without
application.
(2) Check the
protection and
display circuits
with the
sequence
protection
operation test.
(1) Measure voltage
between output
terminals.
(2) Simulate a
short-circuit
between the
inverter warning
outputs.
(1) Line output
balance is 4V
max.
(2) The sequence
protection circuit
must function
correctly.
Rectifier type
voltmeter
All parts
(1) Any strange
smells or
discoloration?
(2) Is there heavy
rusting?
(1), (2)
Visual inspection
and smell
(1), (2) Normal
C
ont
rol and prot
ect
ion circuit
s
Capacitor
Any trace of liquid
leaks or
deformation?
Visual inspection
Normal
Cool
ing system
Cooling
fan
(1) Is there any
abnormal
vibration or
abnormal noise?
(2) Are any of the
connections
loose?
(1) Audible check
(2) Tighten
fastenings
(1), (2) Normal
Display
unit
Are any LEDs not
working?
Visual inspection
Normal
Di
spl
ay
Meter
Are all readings
correct?
Check indicated
value
Must be within
standard value and
control value.
Voltmeter
Ammeter
Mot
or
General
(1) Is there any
abnormal
vibration or
abnormal noise?
(2) Strange smells?
(1), (2)
Visual, audible and
smell test
(1), (2) Normal