Panasonic VF100 - Maintenance and Inspection Table

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