Carrier 19XR - Configure the VFD

11
Fig. 11 — 19MV Nameplate
Fig. 12 — 19XR6/7 Nameplate
Configure the VFD
Key configurations required by the VFD are supplied by the HMI
through the VFD Gateway. Any configuration changes necessary
are made on the HMI screens. A complete set of configurations is
transmitted to the VFD each time the controls are powered up.
Table 2 lists parameters displayed on the 19MV Unit Mounted
VFD configuration menu. Table 3 shows PIC6 configurations for
19XR6/7 Low Voltage application with freestanding PF755TL.
Table 2 — VFD Configurations (19MV / CFGUMVFD)
PARAMETER TABLE SETTING
Compressor Speed 100% Per Nameplate (default 420 Hz)
Motor Nameplate Current Per Nameplate (default 679 Amps)
Motor Rated Load Current Per Nameplate (default 200 Amps)
Motor Nameplate Voltage Per Nameplate (default 460 Volts)
Motor Nameplate RPM Per Nameplate (default 12600 rpm)
Motor Nameplate KW Per Nameplate (default 1500 kW)
Skip Frequency 1 Optional (default 30 Hz)
Skip Frequency 2 Optional (default 30 Hz)
Skip Frequency 3 Optional (default 30 Hz)
Skip Frequency Band Optional (default 0 Hz)
Increase Ramp Time 60 s
Decrease Ramp Time 60 s
Switch Frequency (KHz) 4 kHz (default 5 kHz)
Motor Poles 4
u PM CEMF Vltg Per Nameplate (417.8 Volts)
u PM Stator Res Per Nameplate (0.0021)
u PM Ld at 0 Per Nameplate (0.1154)
u PM Ld at 100 Per Nameplate (0.1117)
u PM Lq at 25 Per Nameplate (0.2757)
u PM Lq at 50 Per Nameplate (0.2732)
u PM Lq at 75 Per Nameplate (0.2648)
u PM Lq at 100 Per Nameplate (0.2489)
Single Cycle Dropout Optional (default Disable)
Table 3 — 19XR6/7 / CONF_ISM
a
NOTE(S):
a. Parameters in italics are to be entered or confirmed at start-up. 
Parameters in bold are to be changed only after consultation with service
engineering.
PARAMETER TABLE SETTING
Communications Timeout Default 10 s
Starter Type Set for 3 (Freestanding VFD)
Cycle Dropout Default Disable
Motor Rated Load Amps Per Chiller Nameplate
Motor Rated Kilowatts Only required if KW display (not recommended)
Motor Locked Rotor Trip Per Chiller Nameplate
Locked Rotor Start Delay Default 5 cycles
Starter LRA Rating Value from starter nameplate - Maximum fuse
Motor Rated Line Voltage Per Chiller Nameplate
Current Imbal Threshold Default 15%
Voltage Imbal Threshold Default 5%
Motor Current CT Ratio:1
See VFD (nominal amp to ISM at motor RLA to
be approx 4 to 4.5 Amp)
Volt Transformer Ration:1 See VFD
Current Imbal Persist Default 5 s
Voltage Imbal Persist Default 5 s
Line Frequency Faulting Default Disable
Frequency (N=50 Hz, Y=60 Hz) Per Chiller Nameplate
Ground Fault Protection Typically disable
Ground Fault Current Default 15 Amps
Ground Fault Persistence Default 5 cycles
Ground Fault Start Delay Default 10 cycles
GF CT Ratio Default 150
Overvoltage Threshold Default 115 %
Undervoltage Threshold Default 85%
Over under Volt Persis Default 5 s
Under Volt Start Delay Default 1 s
Under Volt Persist 1
Default 1 s (any line voltage below 75% of
Rated Line Voltage)
Under Volt Persist 2
Default 5 s (any line voltage below 80% of
Rated Line Voltage)
Under Volt Persist 3
Default 10 (any line voltage below 85% of
Rated Line Voltage)
Display ISM Power Info Disable