vi

CAUTION: Fasten the screws with the specified fastening torque in the

............. 2–16

table below. Check for any loosening of screws. Otherwise, there is the

 

danger of fire.

 

CAUTION: Remarks for using ground fault interrupter breakers in the main

............. 2–19

power supply: Adjustable frequency inverters with CE-filters(RFI-filter)

 

and shielded (screened) motor cables have a higher leakage current toward

 

Earth GND. Especially at the moment of switching ON this can cause an

 

inadvertent trip of ground fault interrupter breakers. Because of the rectifier

 

on the input side of the inverter there is the possibility to stall the switch-off

 

function through small amounts of DC current. Please observe the follow-

 

ing: • Use only short time-invariant and pulse current-sensitive ground fault

 

interrupter breakers with higher trigger current. • Other components should

 

be secured with separate ground fault interrupter breakers. • Ground fault

 

interrupter breakers in the power input wiring of an inverter are not an

 

absolute protection against electric shock.

 

CAUTION: Be sure to install a fuse in each phase of the main power supply

............. 2–19

to the inverter. Otherwise, there is the danger of fire.

 

CAUTION: For motor leads, ground fault interrupter breakers and electro-

............. 2–19

magnetic contactors, be sure to size these components properly (each must

 

have the capacity for rated current and voltage). Otherwise, there is the

 

danger of fire.

 

CAUTION: Failure to remove all vent opening covers before electrical

............. 2–20

operation may result in damage to the inverter.

 

Powerup Test Caution Messages

CAUTION: The heat sink fins will have a high temperature. Be careful not

............. 2–21

to touch them. Otherwise, there is the danger of getting burned.

 

CAUTION: The operation of the inverter can be easily changed from low

............. 2–21

speed to high speed. Be sure to check the capability and limitations of the

 

motor and machine before operating the inverter. Otherwise, there is the

 

danger of injury.

 

CAUTION: If you operate a motor at a frequency higher than the inverter

............. 2–22

standard default setting (50Hz/60Hz), be sure to check the motor and

 

machine specifications with the respective manufacturer. Only operate the

 

motor at elevated frequencies after getting their approval. Otherwise, there

 

is the danger of equipment damage and/or injury to personnel.

 

CAUTION: Check the following before and during the powerup test. Other-

............. 2–22

wise, there is the danger of equipment damage. • Is the shorting bar between

 

the [P] and [PD] terminals installed? DO NOT power or operate the inverter

 

if the jumper is removed. • Is the direction of the motor rotation correct? • Did the inverter trip during acceleration or deceleration? • Were the rpm and frequency meter readings as expected? • Were there any abnormal motor vibrations or noise?