Design Guide | iC2-Micro Frequency Converters Introduction and Safety
Safe operation guidelines
l The drive is not suitable as the only safety device in the system. Make sure that additional monitoring and protection devices on
drives, motors, and accessories are installed according to the regional safety guidelines and accident prevention regulations.
l Before activating any automatic fault reset functions or change limit values, make sure that no dangerous situations can occur after
restart. If the auto reset function is activated, the motor starts automatically after an automatic fault reset.
l Keep all doors and covers closed and terminal boxes screwed on during operation of the drive and when mains is connected.
l Drive components and accessories can still be live and connected to mains, even after the operation indicators are no longer
illuminated.
WARNING
LACK OF SAFETY AWARENESS
This guide provides important information on preventing injury and damage to the equipment or the system. Ignoring this
information can lead to death, serious injury, or severe damage to the equipment.
l Make sure to fully understand the dangers and safety measures present in the application.
l Before performing any electrical work on the drive, lock out and tag out all power sources to the drive.
WARNING
HAZARDOUS VOLTAGE
AC drives contain hazardous voltage when connected to the AC mains or connected on the DC terminals.
Failure to perform installation, start-up, and maintenance by qualified personnel can result in death or serious
injury.
l Only qualified personnel must perform installation, start-up, and maintenance.
WARNING
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain charged even when the drive is not powered. High
voltage can be present even when the warning indicator lights are off.
l Stop the motor, disconnect AC mains, permanent magnet type motors, and remove DC-link supplies,
including battery backups, UPS, and DC-link connections to other drives.
l Wait for the capacitors to discharge fully and measure it before performing any service or repair work.
l The minimum waiting time is specified in the table Discharge time.
Table 2: Discharge Time
Enclosure size Minimum waiting time (minutes)
MA01c–MA02c and MA01a–MA03a 4
MA04a–MA05a 15
CAUTION
INTERNAL FAILURE HAZARD
An internal failure in the drive can result in serious injury when the drive is not properly closed.
l Ensure that all safety covers are in place and securely fastened before applying power.
Danfoss A/S © 2024.08 AJ402315027937en-000401 / 130R1239 | 11
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