Maintenance And Inspection Table - Panasonic VF100 Instruction Manual

4. Maintenance and Inspection Table

Note) Symbols in the check frequency field have the following meanings:
•™ means daily, •› means yearly and, •• means every two years.
Inspection
Inspection details
item
Ambient temperature,
Ambient
environment humidity, dust,ect.
Whole system Is there any abnormal vibration or noise?
Power Is the main circuit
voltage voltage normal?
1) Check if all fastenings are tight
2) Any indication of overheating
General
on any part?
3) Clean
Connected
1) Are electrical conductors
electrical
crooked?
conductors
2) Is the cover broken?
and wires
Transformer Strange smell?
Terminal blocks Is there any damage?
Transistor Check the resistance
between terminals
and diode
1) Are there any liquid leaks?
2) Is the safety valve normal?
Smoothing
capacitor 3) Measure electrostatic
capacity.
1) Is the operational noise normal?
Relay
2) Check the state of contact roughness.
1) Are the insulators cracked?
Resistor
2) Are any wires disconnected?
1) Check output line voltage
balance between phases
during inverter operation
Operation
without application.
2) Check the protection and
checks
display circuits with the
sequence protection
operation test.
1) Any strange smells or
All parts discoloration?
2) Is there heavy rusting?
Capacitor Any trace of liquid leaks or deformation?
1) Is there any abnormal vibration
or abnormal noise?
Cooling fan
2) Are any of the connections loose?
Display unit Are any LEDs not working?
Meter Are all readings correct?
1) Is there any abnormal
vibration or abnormal noise?
General
2) Strange smells?
Inspection
Inspection
frequency
method
See installation
¡î
precautions
¡î Vi s ual i n specti o n and audi b l e check Normal
Measure the
¡î
input voltage
1) Tighten fastenings
¡ð
2) Visual inspection
¡ð
¡ð
¡ð
1), 2) Visual
inspection
¡ð
By smell
¡î
¡ð
Visual inspection
Disconnect main circuit
¡ò
wires and measure at
terminal
¡î
1), 2) Visual
inspection
¡î
3) Using a capacitance
¡ð meter
1) Audible check
¡ð
2) Visual inspection
¡ð
1), 2) Visual
¡ð
inspection
¡ð
1) Measure voltage
¡ð
between output
terminals.
2) Simulate a short-
¡ð
circuit between the
inverter warning
outputs.
1), 2) Visual inspection
¡ð
and smell
¡ð
¡î Visual inspection Normal
1) Audible check
¡î
2) Tighten fastenings
¡ð
¡î Visual inspection Normal
¡î
Check indicated value
¡î
Visual, audible
¡î
and smell test
Test criteria Instrument
Ambient temperature:
Thermometer
-10 to 50•Ž
hygrometer
Humidity: 90% max.
400V£º
323~506 V AC Multimeter
1), 2) Normal
1), 2) Normal
Normal
Normal
Multimeter
1), 2) Normal
3) Minimum 85% of
Capacitance
meter
rated capacity
1), 2) Normal
1), 2) Normal
1) Line output balance
is 4V max.
(400V type is 8V maximum.)
Rectifier
type
2) The sequence
voltmeter
protection circuit
must function
correctly.
1), 2) Normal
1), 2) Normal
Must be within standard
Voltmeter
value and control value.
Ammeter
1), 2) Normal
201