User Manual
EM303A General Purpose Inverter
128
10 Maintenance and Inspection
10.1 Maintenance and Inspection
Due to the service environmental changes such as temperature, humidity, smoke,
frost, dust, or the factors as aging of inverter’s internal components, various failures
of inverter may occur. Therefore, it is required to have daily check and keep regular
maintenance on inverter during use and storage.
z
Check if the components are broken or the screws are loose during transportation.
z
Clean the inverter and periodically check if the screws are loose.
z
Power-on the sleeping inverters for 30 minutes once semiannually to prevent
electronic components from being disabled.
z
Keep inverter away from heavy humidity and metal particles. If necessary, put
it in an electric cabinet or a small room with protective measures.
10.2
Daily Inspection
Check the following items with the inverter in operation:
z
The motor should not be vibrating or making unusual sound.
z
Inverter and motor should not be overheating.
z
The ambient temperature should not be too high.
z
The output current value shown on the monitoring displays should not be higher
than normal value.
z
The cooling fan at the bottom of the inverter should be in normal operation.
10.3
Periodic Maintenance
Periodic maintenance ensures that the inverter receives the proper care to maintain
overall performance. Always turn the power supply off before inspection, and the
inspection starts only after the indicator CHARGE on main circuit power supply is
off.
Table 10-1 Periodic Maintenances
Item
Checks
Corrective Action
Main circuit terminals,
screws on control
circuit terminals
Are all screws tight?
Tighten loose screws firmly.
Heatsink
Are there dirty or dusty?
Clean any dirt and dust off with an air
gun using dry air at a pressure of 4
～
6kg/cm
2
PCBA
Cooling fan
Is there any unusual noise or
vibration or has the total operating
time exceeded 20,000 hours?
Replace the cooling fan.
Power Components
Are they dusty?
Clean any dirt and dust off with an air
gun using dry air at a pressure of 4
～
6kg/cm
2
Electrolytic Capacitor
Are there any irregularities such as
discoloration or odor?
Replace the capacitor.
