Introduction; Safety; Authorized Staff; Residual Risks - Bitzer VARIPACK FD+6 Instructions De Service

1 Introduction

The VARIPACK frequency inverters (FI) have been de-
veloped for use in refrigeration, especially for capacity
control of BITZER compressors. In addition to speed
control, the VARIPACK frequency inverters can also
take over control functions of the refrigeration system.
These Operating Instructions describe the
BITZER VARIPACK frequency inverters for refrigera-
tion compressors. For any further information regarding
the programming of the Modbus RTU and Modbus
TCP/IP interface, see BEST SOFTWARE 2.9 or newer.
The VARIPACK frequency inverters have been built in
accordance with state-of-the-art methods and current
regulations. Particular importance has been placed on
user safety. These Operating Instructions must be kept
available in the vicinity of the VARIPACK frequency in-
verter!

2 Safety

2.1 Authorized staff

All work done on frequency inverters may only be per-
formed by qualified and authorized staff who have been
trained and instructed accordingly. Local regulations
and guidelines apply with respect to the staff's qualifica-
tion and expertise.

2.2 Residual risks

Frequency inverters may present unavoidable residual
risks. That is why any person working on this device
must carefully read these Operating Instructions!
The following rules and regulations are mandatory:
• relevant safety regulations and standards (e.g.
EN378-2 and EN60204-1),
• generally accepted safety rules,
• EU directives,
• national regulations.
CB-100-2

2.3 Safety references

are instructions intended to prevent hazards. Safety ref-
erences must be stringently observed!
NOTICE
!
!
Safety reference to avoid situations which may
result in damage to a device or its equipment.
CAUTION
Safety reference to avoid a potentially hazard-
ous situation which may result in minor or mod-
erate injury.
WARNING
Safety reference to avoid a potentially hazard-
ous situation which could result in death or seri-
ous injury.
DANGER
Safety reference to avoid an imminently hazard-
ous situation which may result in death or seri-
ous injury.
2.3.1

General safety references

DANGER
Life-threatening voltages inside the frequency
inverter housing!
Contact can lead to serious injuries or death.
Never open the FI housing in operation! Switch
off the main switch and secure it against being
switched on again.
Wait for at least 5 minutes until all capacitors
have been discharged!
Before switching on again, close the FI housing.
DANGER
Wrong or insufficient earthing may result in life-
threatening electric shocks upon contact with
the VARIPACK frequency inverter!
Earth the complete VARIPACK frequency in-
verter permanently and check the earth contacts
at regular intervals!
Prior to any intervention in the device, check all
voltage connections for proper insulation.
NOTICE
!
!
Risk of frequency inverter failure caused by
over-voltage!
Never carry out high-voltage tests or an insula-
tion test on lines in operation, without having
disconnected the frequency inverter beforehand
from the circuit to be tested!
3