Hitachi NES1-002LB, Краткое руководство пользователя

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Chapter 11 Maintenance and Inspection
11 - 2
11.2 Daily and Periodic Inspections
Item Inspected Check for…
Inspection
Cycle
Inspection
Method
Criteria
Daily Year
Overall
Ambient
environment Extreme
temperatures &
humidity  Thermometer,
hygrometer Ambient temperature between
–10 to 50

C,
Humidity 90% or less
non-condensing
Major
devices Abnormal noise &
vib.  Visual and aural Stable environment for electronic
controls
Power
supply
voltage Voltage tolerance  Digital volt meter,
measure between
inverter terminals
[L1], [L2], [L3] 200V class: 50/60 Hz
200 to 240V (-15/+10%)
400V class: 50/60 Hz
380 to 480V (-15/+10%)
Main
circuit
Ground
Insulation Adequate resistance  Refer to P6-16
5 M

or greater
Ground
terminal No loose screws

Torque wrench M4: 0.8Nm
Components Overheating  Thermal trip events No trip events
Terminal
block Secure connections

Visual No abnormalities
No loose screws  Torque wrench M3.5: 1.0Nm
M4: 1.5Nm
Smoothing
capacitors Leaking, swelling  Visual No abnormalities
Relay(s) Chattering

Aural Single click when switching ON
or OFF
Resistors Cracks or discoloring  Visual Check Ohms of optional braking
res.
Control
circuit
Function Voltage balance
between phases
 Measure voltage
between U,V,W Difference must be 2% or less.
Protection circuit  e.g. Input Ex.trip
signal and check
inverter behavior
and alarm signal. Functions properly.
Overall No odor, discoloring,
corrosion  Visual No abnormalities
Capacitor Leaking, swelling  Visual Undistorted appearance
Terminal No loose screws  Torque wrench M2: 0.2Nm
Cooling
Cooling fan Noise

Power down,
manually rotate Rotation must be smooth
Dust  Visual Vacuum to clean
Mounting

Visual Mounted firmly
Heat sink Dust  Visual Vacuum to clean
Display LEDs Legibility
 Visual All LED segments work
Note 1: The life of a capacitor is affected by the ambient temperature. See “11.6”.
Note 2: Designed life of a cooling fan is.10 years. However, it is affected by the ambient
temperature and other environmental conditions.
Note 3: The inverter must be cleaned periodically. If dust accumulates on the fan and heat sink, it
can cause overheating of the inverter.
Note 4: Do not pull the cooling FAN’s wire, otherwise cooling FAN might cut the wires and cause
failure.