Panasonic VF0 Series Instruction Manual page 82

4. Maintenance and inspection table
Note) Symbols in the check frequency field have the following meanings:
Inspection
Installation
condition
Whole
system
Power
voltage
General
Connected
electrical
conductors
and wires
Transformer
reactor
Terminal
blocks
Transistor
diode
Smoothing
capacitor
Relays
Resistor
81
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means yearly and
Check item
item
Ambient
temperature, relative
humidity, dust, etc.
Is there any
abnormal vibration
or noise?
Is the main circuit
voltage normal?
(1) Check if all
fastenings are
tight.
(2) Any indication of
overheating on
any part?
(3) Clean
(1) Are electrical
conductors
crooked?
(2) Is the cover
broken?
Strange smells?
Is there any
damage?
Check the resistance
between terminals.
(1) Are there any
liquid leaks?
(2) Is the safety
valve normal?
(3) Measure
electrostatic
capacity.
(1) Is the operational
noise normal?
(2) Check the state
of contact
roughness.
(1) Are the insulators
cracked?
(2) Are any wires
disconnected?
manuals search engine
means every two years.
Check
Check method
frequency
See installation
precautions.
Visual inspection
and audible check
Measure the input
voltage
(1) Tighten
fastenings
(2) Visual inspection
(1), (2)
Visual inspection
By smell
Visual inspection
Disconnect main
circuit wires and
measure at terminal
(1), (2)
Visual inspection
(3) Using a
capacitance
meter
(1) Audible check
(2) Visual inspection
(1), (2)
Visual inspection
means daily,
Test criteria Instrument
Ambient temp.:
–10 to 50°C Thermometer
Relative humidity: Hygrometer
90% max.
Normal appearance
and noise
323 to 506VAC Voltmeter
(1), (2) Normal
(1), (2) Normal
Normal
Normal
Ohm meter
(1), (2) Normal
Capacitance
meter
(3) Minimum 85% of
rated capacity
(1), (2) Normal
(1), (2) Normal
Continued on following page.