HV580L Series Frequency Inverter
7
During
maintenance
DANGER
• Repair or maintenance of the AC drive may be performed only by qualified
personnel. Failure to comply will result in personal injury or damage to the AC drive.
• Do not repair or maintain the AC drive at power-on. Failure to comply will result in
electric shock.
• Repair or maintain the AC drive only ten minutes after the AC drive is powered off.
This allows for the residual voltage in the capacitor to discharge to a safe value.
Failure to comply will result in personal injury.
• Ensure that the AC drive is disconnected from all power supplies before starting
repair or maintenance on the AC drive.
• Set and check the parameters again after the AC drive is replaced.
• All the pluggable components must be plugged or removed only after power-off.
• The rotating motor generally feeds back power to the AC drive.
As a result, the AC drive is still charged even if the motor stops, and the power
supply is cut off. Thus ensure that the AC drive is disconnected from the motor
before starting repair or maintenance on the AC drive.
1.2 General Precautions
1) Motor insulation test
Perform the insulation test when the motor is used for the first time, or when it is reused after being stored for a
long time, or in a regular check-up, in order to prevent the poor insulation of motor windings from damaging
the AC drive. The motor must be disconnected from the AC drive during the insulation test. A 500-V
mega-Ohm meter is recommended for the test. The insulation resistance mus
t not be less than 5 MΩ.
2) Thermal protection of motor
If the rated capacity of the motor selected does not match that of the AC drive, especially when the AC drive's
rated power is greater than the motor's, adjust the motor protection parameters on the operation panel of the
AC drive or install a thermal relay in the motor circuit for protection.
3) Running at over 50 Hz
The AC drive provides frequency output of 0 to 3200 Hz (Up to 300 Hz is supported if the AC drive runs in
CLVC and SFVC mode). If the AC drive is required to run at over 50 Hz, consider the capacity of the machine.
4) Vibration of mechanical device
The AC drive may encounter the mechanical resonance point at some output frequencies, which can be
avoided by setting the skip frequency.