![background image](http://html1.mh-extra.com/html/carrier/capri-280/capri-280_operation-and-service-manual_2561122020.webp)
2-5
T-283
2.4.8 SYSTEM PARAMETERS
Pressing the up/down arrow keys will allow the user to
scroll up or down through the parameters. If no key is
pressed for 30 seconds this mode is exited and the
display will revert back to setpoint. Pressing the on/off
key any time will exit this mode and the display will
again indicate the setpoint setting. The parameters
are shown in Table 2-2. When scrolling through the
parameters, the current parameter parameter will be
displayed for two seconds. After two seconds, the
display will show the data for the current parameter.
When the last parameter is reached, the next
parameter will wrap back to one.
Table 2-2. Parameter Codes
CODE
CODE NAME
DESCRIPTION
P1
Return Air Temperature
This value is the temperature measured by the return air sensor. If the sensor
is shorted it will display
CL. If it is open circuited it will display OP.
P2
Coil Temperature
This value is the coil temperature measured by the evaporator temperature
sensor. If the sensor is shorted it will display
CL. If it is open circuited it will
display
OP.
P3
Ambient Temperature
This value is the outside temperature measured by the ambient temperature
sensor. If the sensor is shorted it will display
CL. If it is open circuited it will
display
OP.
P4
Suction Line Tempera-
ture (not used)
Not used.
P5
Suction Pressure
This value is the suction pressure measured by the suction pressure transduc-
er. If the sensor is shorted it will display
CL If it is open circuited it will display
OP. If the auto key is pressed and held for five seconds the suction pressure
will be calibrated to zero and the offset will be stored in no-volatile memory.
This calibration will be locked out if the offset is greater than 20 or less than
6.7 or if the clutch output is energized.
P6
Discharge Pressure
This value is the discharge pressure measured by the discharge pressure
transducer. If the sensor is shorted it will display “CL” and if it is open circuited
it will display “OP”. If the auto key is pressed and held for five seconds the
suction pressure will be calibrated to zero and the offset will be stored in
non-volatile memory. This calibration will be locked out if the offset is greater
than 20 or less than 6.7 or if the clutch output is energized.
P7
Superheat (not used)
Not used.
P8
Analog Setpoint Tem-
perature (not used)
Not used.
P9
A/C Control Window #1 This is the number of degrees F above setpoint at which the unloaders will be
both energized. This value can be modified between 0 and 10 degrees F. The
default value is 1 degree F.
P10
A/C Control Window #2 This is the number of degrees F above AC control window one at which the
first unloader will be energized. This value can be modified between 0 and 10
degrees F. The default value is 1 degree F.
P11
A/C Control Window #3 This is the number of degrees F above AC control window two at which the
evaporator fan speed will be set to low. This value can be modified between
0 and 10 degrees F. The default value is 1 degree F.
P12
Heat Control Window
This is the number of degrees F below setpoint before the heat valve is ener-
gized. This value can be modified between 0 and 10 degrees F. The default
value is 2 degree F for heat and 4 degrees F for reheat.
P13
Compressor Safety Off
Delay
This number is the minimum time in minutes that the compressor must be off
after a high or low pressure alarm before it can be restarted. This value can be
modified between one and five minutes. The default value is 1.
P14
Fan Delay
This is the minimum time (in seconds) that the fans must run at a particular
speed before changing to another speed. This value can be modified be-
tween one and 60 seconds. The default value is two seconds.
Summary of Contents for CAPRI-280
Page 1: ...Model CAPRI 280 Septa T 283 Bus Air Conditioning Equipment...
Page 39: ...5 2 Figure 5 1 Electrical Wiring Schematic Diagram Drawing No 62 10112 00 Sheet 1 of 3...
Page 40: ...5 3 Figure 5 1 Electrical Wiring Schematic Diagram Drawing No 62 10112 00 Sheet 2 of 3...
Page 41: ...5 4 Figure 5 1 Electrical Wiring Schematic Diagram Drawing No 62 10112 00 Sheet 3 of 3...