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N700E INSTRUCTION MANUAL
4-6
Monthly and Yearly Inspection Chart
Item Inspected
Check for…
Inspection
Cycle
Inspection
Method
Criteria
Month Year
O
veral
l
Ambient
environment
Extreme
temperatures
& humidity
∨
Thermometer,
hygrometer
Ambient temperature
between -10 to 40
℃
,
non-condensing
Major devices
Abnormal
vibration
noise
∨
Visual and aural
Stable environment for
electronic controls
Power supply
insulation
Voltage
tolerance
∨
Digital volt meter,
measure between
inverter terminals
R, S, T
230V class:
200 to 240V 50/60Hz
460V class:
400 to 480V 50/60Hz
Ma
in c
irc
ui
t
Ground
Insulation
Adequate
resistance
∨
Digital volt meter,
GND to terminals
1000V class
Mega ohm meter
Mounting
No loose
screws
∨
Torque wrench
• M3: 0.8~1.0Nm
• M4: 1.2~1.5Nm
• M5: 2.0~2.5Nm
• M6: 2.5~3.0Nm
• M8: 15.2~21.5Nm
• M10: 28.0~33.0Nm
• M12: 39.0~50.0Nm
Components Overheating
∨
Thermal trip
events
No trip events
Housing
Dirt, dust
∨
Visual
Vacuum dust and dirt
Terminal block Secure
connections
∨
Visual
No abnormalities
Smoothing
capacitor
Leaking
swelling
∨
Visual
No abnormalities
Relay(s)
Chattering
∨
Aural
Single click when
switching On or Off
Resistors
Cracks or
discoloring
∨
Visual
Use Ohm meter to check
braking resistors
Cooling FAN
Noise
∨
Power down,
manually rotate
Rotation must be smooth
Dust
∨
Vacuum to clean
Control
circuit
Overall
No odor,
discoloring
corrosion
∨
Visual
No abnormalities
Capacitor
No leaks or
deformation
∨
Visual
Undistorted appearance
Display
LEDs
Legibility
∨
Visual
All LED segments work
Note1: The life of a capacitor is affected by the ambient temperature.
Note2: The VFD must be cleaned periodically.
If dust accumulates on the fan and heat sink, it can cause overheating of the VFD.