Bitzer VARIPACK FDU+12, Руководство по эксплуатации

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CB-100-1 37
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 Reference Guide CG-100.
The VARIPACK frequency inverters have been built in
accordance with state-of-the-art methods and current
regulations. Particular importance was 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.
EN 378-2 and EN 60204-1),
• generally accepted safety rules,
• EU directives,
• national regulations.
2.3 Safety references
are instructions intended to prevent hazards. Safety ref-
erences must be stringently observed!
!
!
NOTICE
Instructions on preventing possible damage to
equipment.
CAUTION
Instructions on preventing a possible minor haz-
ard to persons.
WARNING
Instructions on preventing a possible severe
hazard to persons.
DANGER
Instructions on preventing an immediate risk of
severe hazard to persons.
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!
CAUTION
In operation, the heat sink of the VARIPACK fre-
quency inverter will get hot.
Risk of burns upon contact!
Prior to performing work on the VARIPACK fre-
quency inverter, disconnect the power supply
and wait for at least 15 minutes until the heat
sink has cooled down.