Danfoss Turbocor Twin-Turbine TTS Series Applications And Installation Manual page 14

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M-AP-001-EN Rev. Q
Acronym / Term Definition
EMC Electromagnetic Compatibility
EMF Electromotive Force
EMI Electromagnetic Interference
EMI Filter A circuit or device that provides electromagnetic noise suppression for an electronic device.
EPC Extended Performance Compressor
ETL ETL Testing Laboratories, now a mark of Intertek Testing Services.
Electronic Expansion Valve. Pressure-independent refrigerant metering device driven by
EXV
electrical input.
A record of events occurring during the compressor's lifecycle, indicating when events and
Event Log
faults occur and in what order. The event log is held in the BMCC.
Critical faults indicate an intolerable or unsafe condition that will result in equipment
failure if unchecked. They will cause the compressor controller to reduce speed and shut
down the system within 60 seconds. This type of fault requires a manual reset. Critical faults
Faults (Critical) include: Discharge Pressure Fault, 3-Phase Over-Current Fault, and Lock Out Fault. If any
of the following faults occur three times within a 30-minute period, they also will require
a manual reset: Inverter Temperature Fault, Cavity Temperature, SCR Temperature Fault,
Motor High Current Fault, and Motor back EMF is low.
Faults indicate an intolerable or unsafe condition that will result in equipment failure if
Faults (Non-Critical) unchecked. They will cause the compressor controller to reduce speed and shut down the
system within 60 seconds. This type of fault has an automatic reset.
An insulated conductor connecting two circuits on opposite sides of a barrier such as a
Feedthrough
compressor housing or PCB.
FIE Fully Integrated Electronics version of the compressor.
FLA Full Load Amps
A function of the compressor where the stator becomes a generator, creating sufficient
power to allow for the shaft to graduate slowly and drop onto the touchdown bearings
Generator Mode
safely. This occurs when the inverter has insufficient power to sustain safe and normal
operation and is typically due to a loss of power.
A type of grease. In certain climates where the dew point falls below the operating
Genlanolin temperature of some of the electronic components, it is necessary to apply Genlanolin to
certain parts of the compressor to prevent moisture accumulation.
Harmonics are multiples of the fundamental frequency distortions found in electrical
Harmonics
power, subjected to continuous disturbances.
HFC Hydrofluorocarbon
HFC-134a A positive-pressure, chlorine-free refrigerant having zero ozone depletion potential.
Hermetic Motor A motor that is sealed within the refrigerant atmosphere inside the compressor.
ICD Integrated Compressor Design
IEEE Institute of Electrical and Electronic Engineers (www.ieee.org)
IGBT Insulated Gate Bipolar Transistor. See Inverter.
Inlet Guide Vanes. The IGV assembly is a variable-angle guiding device that pre-rotates
refrigerant flow at the compressor intake and is also used for capacity control. The IGV
IGV assembly consists of movable vanes and a motor. The vane angle, and hence, the degree of
pre-rotation to the refrigerant flow, is determined by the BMCC and controlled by the Serial
Driver. The IGV position can vary between approximately 0-percent and 110-percent open.
Rotating part of a centrifugal compressor that increases the pressure of refrigerant vapor
Impeller
from the lower evaporator pressure to the higher condenser pressure.
Input/Output Board facilitating a connection between the compressor controller and/
or PC and the compressor. It allows the user to control the compressor and allows the
I/O Board
compressor to return status and sensor information to the user. Also known as the
Compressor Interface Module (CIM).
The Inverter converts the DC bus voltage into an adjustable frequency and adjustable
Inverter
amplitude, three-phase simulated AC voltage.
IPLV Integrated Part Load Value
Load Balance Valve. A modulating valve that can be installed to bypass discharge gas to the
LBV inlet of the evaporator to provide gas flow at certain conditions such as startup, surge, and
further unloading of the compressor.