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cycled at very fast rates, the set point could be maintained very
precisely. Since it is not desirable to cycle compressors more
than 6 cycles per hour, slow change override takes care of keep
-
ing the PID under control when “relatively” close to set point.
EXV INFORMATION DISPLAY TABLE
The EXV information display table provides information on
the unit cooling EXVs.
VFD INFORMATION DISPLAY TABLE
The VFD information display table provides information on
the supply fan VFD and exhaust fan VFD. See Table 86.
OUTDOOR FAN VFD DISPLAY TABLE
The outdoor fan VFDs display table provides information on
the outdoor fan VFD. Specifically the motor commanded
speed, 0 to 100%.
MODE TRIP HELPER
The Mode Trip Helper table provides information on the unit
modes and when the modes start and stop. See Table 87. This
information can be used to help determine why the unit is in
the current mode.
CCN/LINKAGE DISPLAY TABLE
The CCN/Linkage display table provides information on unit
linkage. See Table 88.
COMPRESSOR RUN HOURS DISPLAY TABLE
The Compressor Run Hours Display Table displays the number
of run time hours for each compressor. See Table 89.
COMPRESSOR STARTS DISPLAY TABLE
The Compressor Starts Display Table displays the number of
starts for each compressor. See Table 90.
SOFTWARE VERSION NUMBERS DISPLAY TABLE
The Software Version Numbers Display Table displays the
software version numbers of the unit boards and devices. See
Table 86 —
VFD Information Display Table
ITEM
EXPANSION
RANGE
UNITS
CCN POINT
WRITE STATUS
VFDS
VFD INFORMATION
S.VFD
SUPPLY FAN VFD (VFD 1)
SPD
VFD1 Actual Speed %
0-100
%
VFD1_SPD
RPM
VFD1 Actual Motor RPM
0-30000
VFD1RPM
FREQ
VFD1 Actual Motor Freq
0-500
VFD1FREQ
AMPS
VFD1 Actual Motor Amps
0-999
amps
VFD1AMPS
TORQ
VFD1 Actual Motor Torque
–200-200
%
VFD1TORQ
PWR
VFD1 Actual Motor Power
–150-150
kW
VFD1PWR
VDC
VFD1 DC Bus Voltage
0-1000
voltage
VFD1VDC
V.OUT
VFD1 Output Voltage
0-1000
voltage
VFD1VOUT
TEMP
VFD1 Transistor Temp (C)
0-150
VFD1TEMP
RUN.T
VFD1 Cumulative Run Time
0-65535
hours
VFD1RUNT
KWH
VFD1 Cumulative kWh
0-65535
VFD1KWH
LFC
VFD1 Last Fault Code
0-65535
VFD1LFC
E.VFD
EXHAUST FAN VFD (VFD 2)
SPD
VFD2 Actual Speed %
0-100
%
VFD2_SPD
RPM
VFD2 Actual Motor RPM
50-30000
VFD2RPM
FREQ
VFD2 Actual Motor Freq
10-500
VFD2FREQ
AMPS
VFD2 Actual Motor Amps
0-999
amps
VFD2AMPS
TORQ
VFD2 Actual Motor Torque
–200-200
%
VFD2TORQ
PWR
VFD2 Actual Motor Power
–150-150
kW
VFD2PWR
VDC
VFD2 DC Bus Voltage
0-1000
voltage
VFD2VDC
V.OUT
VFD2 Output Voltage
0-1000
voltage
VFD2VOUT
TEMP
VFD2 Transistor Temp (C)
0-150
VFD2TEMP
RUN.T
VFD2 Cumulative Run Time
0-65535
hours
VFD2RUNT
KWH
VFD2 Cumulative kWh
0-65535
VFD2KWH
LFC
VFD2 Last Fault Code
0-65535
VFD2LFC
O.VFD
OUTDOOR FAN VFDS
SPD.A
MtrMaster A Commanded %
0-100
%
MM_A_VFD
SPD.B
MtrMaster B Commanded %
0-100
%
MM_B_VFD
Summary of Contents for WeatherExpert 48N2
Page 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Page 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Page 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Page 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Page 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Page 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Page 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Page 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Page 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Page 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Page 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Page 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Page 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...