Operating instructions
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11.1.2 - Wiring and installation inspection
For these checks the circuit breaker/disconnect switch of
the VFD control box must be on the open position.
ATTENTION: Isolation using the main disconnect switch
does not disconnect the voltage upstream to the power
conductor connection terminals in the power supply to
the machine.
Check the electrical connections: tightening torques and
connector tightening on the electronic boards.
Checking the variable-frequency drive in the application:
• The nominal current and capacity data for the variable-
frequency drive must be in accordance with the data
calculated for the machine in the application.
• Check that the voltage at the power connection
terminals of the machine complies with that on the
component name plates.
If documents are kept in the machine, they must be kept in
the document holder on the door. Specifically there must
not be any paper in the space below the power module, as
there is a risk that it may obstruct the cooling fan of the
power module.
ATTENTION: The warranty conditions for the variable-
frequency drive require that the first start-up is carried
out by a Carrier-authorized technician.
Observe the safety and connection requirements in chapters
8 and 10 of this document.
11.2.1 - Energizing the PIC control circuits and the crankcase
heater
The circuit breaker/disconnect switch QF101 and disconnect
switch QF located in the VFD control box must be closed
to carry out the following checks on these circuits. The
checks are the same as those for the standard machine.
11.2.2 - Quick test of the status LEDs
The status LED on the communication gateway and the
front face of the power module on each rectifier and the
chopper control board permit a quick check of the operation.
The LEDs on the communication gateway must be on as
follows:
• VFD status LED: green continuous or green flashing
• Module status LED: green continuous or green flashing
• NET A status LED: green continuous or green flashing
• NET A status LED: green continuous or green flashing
Refer to chapter 13.3 “Gateway communication module
status LEDs”.
On the front face of the power module the LEDs must be
on as follows:
• Green LED: continuous
• Yellow LED: flashing
Refer to chapter 13.4 “Power module status LEDs”.
11.3.1 - Variable-frequency drive application parameters
The parameter tables for the 19XRV machine are given in
the appendix of this document.
The variable-frequency drive parameters are set at the
factory. The controls can be checked and adjusted on the
ICVC.
The PIC III control permits configuration of the variable-
frequency drive using the VFD_CONF table. A secret code
is required to access the parameter setting of the variable-
frequency drive. It is different from that defined for access
to the other parameters of the PIC III control.
Menu Service Password (default 1111) VFD
CONFIG DATA Password (default 4444) CFD_CONF.
Specifically, the parameters below must be consistent with
the application.
Motor nameplate voltage Motor voltage at nominal speed (normally 400 V)
Compressor 100% Speed Compressor speed at the nominal machine operating
point (normally 50 Hz)
Rated Line Voltage Nominal line voltage (machine supply, normally 400 V)
Rated Line Amps Line current draw of the machine at its maximum
operating point
Rated Line Kilowatts Line power input of the machine at its maximum
operating point
Motor Rated load kW Power input of the motor at the nominal machine
operating point
Motor Rated Load Amps Current draw of the motor at the maximum machine
operating point and nominal speed
Motor Nameplate Amps Nominal motor current or max. RLA
Motor Nameplate RPM Nominal motor speed
Motor Nameplate kW Nominal motor capacity
: The other variable-frequency drive controls generally keep the default values.
The control parameters of the variable-frequency drive speed
by the PIC III control are accessible from the SETUP2 table:
Menu Service Password (default 1111) SETUP2.
The parameters for the variable-frequency drive application
must be added to the parameters configured for the standard
machine equipped with PIC II control:
VFD Gain Adjusts the response of the variable-frequency drive to a
speed modication demand
VFD Minimum speed Lower limit of the authorised compressor speed range
VFD Maximum Speed Upper limit of the authorised compressor speed range
11.3.2 - Function test (quick test)
The following tests are added to the standard tests carried
out on the machine equipped with PIC II control:
• Relative humidity, in the CCM Pressure Transducer
menu: a humidity of 100% indicates a defective or
disconnected sensor.
• VFD cooling valve, in the Discrete Outputs menu.
Refer to the 19XR PIC III controls manual.