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5. Inspection and Maintenance
Inspection and Maintenance
Items
The corresponding
period for
replacement
Description
Filter
capacitor
5 years
The filter capacitor is an electrolytic capacitor, and will
deteriorate with time. The deterioration speed is contingent on
the ambient conditions. Generally, it shall be replaced every 5
years.
Relay
---
If bad contact occurs, please replace it immediately.
Note: Please send the inverters to the factory when replacement of the parts is necessary.
5.4 Inverter insulation resistance measurement
1. Before measurement, first dismount the ‘wiring of the main-circuit
terminals’ and the ‘control board’. Then execute wiring in the way as
the right figure.
2. The measurement is only suitable for the main circuit. Such
measurement is prohibited for control board terminals.
3. The value of the insulation resistance shall be
greater than
5MΩ.
Note: Please do not carry out a high-voltage test, because the built-in semiconductor components will be
damaged by such a test.
5.5 Motor insulation resistance measurement
1.
Before measurement, please dismount the motor, and demonstrate
wiring in the way as
the right figure.
2.
The insulation resistance shall be greater than
5MΩ.
5.6 Motor insulation resistance measurement
Before check, first dismount the external wires for the main-circuit terminals. Then, set your
multi-meter to the ohm-testing position.
Positive
voltage
Negative
voltage
Normal
result
Positive
voltage
Negative
voltage
Normal
result
Terminal
mark
R
P
Conducting
Terminal
mark
U
P
Conducting
S
P
Conducting
V
P
Conducting
T
P
Conducting
W
P
Conducting
P
R
Not
conducting
P
U
Not
conducting