Chapter 8 Maintenance And Troubleshooting; Daily Maintenance And Inspection Of Jt550 - Veichi JT550 Series Manual

Chapter 7 Maintenance and Troubleshooting

Chapter 8 Maintenance and Troubleshooting

8.1 Daily Maintenance and Inspection of JT550

8.1.1 Daily Maintenance
Due to the effect of ambient temperature, humidity, dust and vibration, inverter's components age over
time, leading to potential errors or shorter life of the motor dive. Therefore, it is necessary to perform
maintenance on the inverter on daily basis. Below is the list of daily inspection:
1) if the inverter makes unusual sound while running;
2) if the motor vibrates while running;
3) if the installation environment have changes;
4) if the cooling fans are working properly;
5) if the inverter is overheated.
Daily Cleaning:
6) Keep the inverter clean;
7) Clean the dust on the surface of inverter, keeping them, especially the metal particles, from going
inside inverter;
8) Clean the greasy dirt on the cooling fans.
8.1.2 Periodic Inspection
Please inspect the places that is hard to spot. Below is the list of places that need to inspect
periodically:
1) Inspect the vents and clean them regularly;
2) Check loose screws;
3) Check if the inverter corrodes;
4) Check if there are any arc marks on terminals
5) Main Circuit Insulation Test
Note: Disconnect the inverter and main circuit when measuring insulation resistance using a
megohmmeter (DC 500V Megohmmeter). Do not test the control circuit insulation using an
insulation resistance meter. No need to perform High Voltage Test since it has been done before
leaving the factory
8.1.3 Wear and Tear Parts Change
Inverter's wear and tear parts include cooling fans and electrolytic capacitor for filtering, and their life
is closely related to ambient conditions and maintenance. Below are their life span:
Cooling Fans: 2-3 years
Electrolytic Capacitor: 4-5 years
Note: Standard life span is only valid under the conditions below. User may determine when to change
parts according to their situation.
● Ambient Temperature: Annual average temperature is around 30℃.
● Duty Cycle: Less than 80%
● Operating Rate: Less than 20 hours per day
1) Cooling Fans
Possible Damage Reasons: Worn bearings and aged fan blades
Criteria: if fan blades have cracks; if there is an unusual vibration sound at start-up
2) Electrolytic Capacitor for Filtering
Possible Damage Reasons: Bad Input Power Supply, High Ambient Temperature, Frequent Load
Jump, and Aged Electrolytes.
Criteria: If there is a leakage of liquid, If there is a bulge on safety valve, test of electrostatic
capacitance, and test of insulation resistance.
8.1.4 Storage for Inverter
A few notes that users need to know if they plan to store the inverter for a long or short period:
1) Put the product in the original package when storing it.
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JT550 Series Inverter Manual