Maintenance and Inspection
Maintenance and Inspection
195
6.3 Regular Replacement for Some Components
Items
Standard replacing
time
Description
Cooling fan
2 years
For the axle of a fan, the standard lifetime is about 10 –
35 thousand hours. Assuming that the fan operates 24
hours per day, the fan should be replaced every 2 years.
Filter
capacitor
5 years
The filter capacitor is an electrolytic capacitor that
deteriorates with time. The deterioration speed is
contingent on the ambient conditions. Generally, it should
be replaced every 5 years.
Relay
---
If bad contact occurs, please replace it immediately.
Note: please send the inverters to the factory fore complement replacement.
6.4 Inverter Insulation Resistance Measurement
1. Before measuring the inverter insulation resistance,
first dismount the “wiring of all the main-circuit terminals”
and the “control board.” Then execute the wiring as
shown in the right picture.
2. The measurement is only suitable for the main circuit.
It is prohibited to use a high-resistance meter for
measuring terminals on the control board.
3. The value of the insulation resistance shall be greater than 5MΩ.
Note: Please do not carry out a high-voltage test; as such test will damage the built-in semiconductor
components.
6.5 Motor Insulation Resistance Measurement
1. Before the measurement, please dismount the motor,
and execute the wiring as shown in the diagram on the right.
2. The value of the insulation resistance shall be greater than 5MΩ.
