Daily Inspection And Periodic Inspection - Hitachi J300 Series Instruction Manual

Inspection
Inspection item
location
Overall Ambient Check ambient temperature,
environment humidity, dust, corrosive
gases, oil mist, etc.
Devices overall Check for abnormal
vibrations and noise.
Power supply Check the input line voltage.
voltage
Main Overall
(1) Insulation resistance test
circuit
(2) Check installation for
(3) Check for evidence of
(4) Clean.
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Daily Inspection and Periodic Inspection (1/3)

Inspection cycle
Inspection content
Daily Periodic
(between main circuit
terminals and grounding
terminal)
looseness.
overheating in the various
components.
Inspection method Criteria
Ambient temperature
between -10 to +50˚C;
no icing.
Ambient humidity 20 to
90%; no dew condensation.
Visual and aural
inspection.
Measure the voltage No abnormalities.
between inverter 200 to 220 V, 50 Hz
terminals R(L1), 200 to 230 V, 60 Hz
S(L2) and T(L3). 380 to 415 V, 50 Hz
400 to 460 V, 60 Hz
No abnormalities in (1) and
(1) Increase tighting
Making a check (2).
on the terque is
needed for the Tightening torque (kgf.cm)
increase tighten- • M3: 8 - 10
• M4: 12 - 15
ing of the modules
• M5: 20 - 25
such as a power
• M6: 25 - 30
module, diode
• M8: 100 - 135
module. Do not
• M10: 150 - 200
execute increse
tightening with
no torque gauge Tightening torque for IPM
prepared. and Diode modules
(kgf.cm)
• M4: 10-15
(2) Tighten.
• M5: 15-20
• M6: 20-25
(3) Visual
inspection.
Standard
Instruments
replacement
period
__
Thermometer
Hygrometer
Tester
__
500 V class
Megohm meter