
KW-210-2 19
1 Introduction
This document describes the replacement of a .F1 fre-
quency inverter of the first generation with a .F1 fre-
quency inverter of the second generation. It explains
how to dismantle the old frequency inverter including all
connections and how to mount a new frequency in-
verter to a VARISPEED compressor of the types
2DES-3.F1.. 4CE-6.F1.
1.1 Also observe the following technical
documents
Number Topic
KB-104 Operating Instructions ECOLINE com-
pressors
KW-100 Tightening torques for screwed connec-
tions
KT-210 ECOLINE VARISPEED: Semi-hermetic
reciprocating compressors with moun-
ted suction gas-cooled frequency in-
verter (FI)
2 Safety
Compressor and frequency inverter have been built in
accordance with state-of-the-art methods and current
regulations. Particular importance has been placed on
user safety.
The notes given in the Operating Instructions for the
compressor must be followed in addition to these Main-
tenance Instructions.
2.1 Authorized staff
All work done on compressors, frequency inverters,
electronic accessories, and refrigeration systems may
only be performed by qualified and authorized staff who
have been trained and instructed accordingly. The local
regulations and directives with respect to the qualifica-
tion and expertise of the skilled personnel shall apply.
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.
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
When working on the electrical system and the fre-
quency inverter:
DANGER
Life-threatening voltages inside the FI 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.
CAUTION
Surface temperatures of more than 60°C or be-
low0°C.
Risk of burns or frostbite.
Close off accessible areas and mark them.
Before performing any work on the compressor:
switch it off and let it cool down or warm up.