When a fault occurs, wait for five seconds after the fault is cleared before pressing
RESET with the input terminal keypad.
Before opening the cover for the maintenance, the drive must first be switched off
for at least five minutes for models ≤ 22 kW and 10 minutes for models ≥ 30 kW
until the charging indicator turns off.
Only qualified personnel can work on maintenance or replace parts. (Remove metal
items such as watch, rings, and other metal items before operation, and use only
insulated tools.)
Never modify the internal components or wiring.
The performance and the surrounding environment should meet the standard
specifications. There should be no abnormal noise, vibration, or odor.
The AC motor drive has various warnings and protections against errors such as over-voltage, low
voltage, or over-current. Once an error occurs, the protections activate, the AC motor drive stops output
and activates the error contacts, and the motor coasts to stop. Refer to the error display from the AC
motor drive and look up the corresponding causes and solutions. The fault record is stored in the AC
motor drive internal memory. You can read it from the digital keypad or through the communications by
accessing the parameters.
The AC motor drive contains a large number of electronic components including ICs, resistors,
capacitors, transistors, and cooling fans. These components do not last forever. Even under normal
circumstances, they will eventually become error-prone if used exceed their lifespan. Therefore, you
must perform periodic preventive maintenance to identify defective and worn out parts, and eliminate the
causes of malfunctions in the AC motor drive at an early stage. At the same time, parts that have
exceeded their product life should be replaced to ensure safe operation.
Visual checks should be done regularly to monitor the AC motor drive's operation, and to make sure
nothing unusual happens. Check the situations listed in this Chapter.
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