Carrier 50LC 07, Service And Maintenance Instructions, Page: 41 / 100

41
Table 9 – Menu Structure
a1
Menu Parameter
Parameter
Default
Value
Parameter
Range and Increment
b
EXPANDED PARAMETER NAME
Notes
STATUS ECON AVAIL NO YES/NO ECONOMIZING AVAIALBLE
YES = economizing available; the system can use outside air for free
cooling when required
ECONOMIZING NO YES/NO ECONOMIZING ACTIVE
YES = Outside air being used for 1
st
stage cooling.
NO = Economizing not active
OCCUPIED NO YES/NO OCCUPIED
YES = OCC signal received from space thermostat
or unitary controller.
YES = 24 Vac on terminal OCC.
NO = 0 Vac on terminal OCC.
HEAT PUMP n/a
c
COOL
HEAT
HEAT PUMP MODE
(Not available on 2---Speed configuration)
COOL Y1---IN OFF ON/OFF FIRST STAGE COOLING DEMAND (Y1---IN)
Y1---I signal from space thermostat or unitary controller for Cooling Stage 1.
ON = 24 Vac on terminal Y1---I
OFF = 0Vac on terminal Y1---I
COOL Y1---OUT OFF ON/OFF FIRST STAGE COOLING RELAY OUTPUT
ON = 24 Vac on terminal Y1---O; Stage 1 mechanical cooling called on
OFF = 0 Vac on terminal Y1---O; no mechanical cooling
COOL Y2---IN OFF ON/OFF SECOND STAVE COOLING DEMAND (Y2---IN)
Y2---I signal from space thermostat or unitary controller for Cooling Stage 2.
ON = 24 Vac on terminal Y2---I
OFF = 0 Vac on terminal Y2---I
COOL Y2---OUT OFF ON/OFF SECOND STAGE COOLING RELAY OUTPUT
ON = 24 Vac on terminal Y2---O; Stage 2 mechanical cooling called on
OFF = 0 Vac on terminal Y2---O; no Stage 2 mechanical cooling
MA TEMP nn
_
F (or
_
C) 0 to 140
_
F
(---18 to 60
_
C)
SUPPLY AIR TEMPERATRUE, Cooling Mode
Displays value of measured mixed/cooled air from SAT sensor in fan
section.
Displays --- ---.--- if not connected, short or out---of---range. See Menu Note 2
DA TEMP nn
_
F (or
_
C) 0 to 140
_
F
(---18 to 60
_
C)
DISCHARGE AIR TEMPERATRUE, after Heating section
(Accessory sensor required)
Displays when Discharge Air sensor is connected and displays measured
discharge temperature.
Displays --- --- --- --- --- --- if sensor sends invalid value, if not connected, short
or out---of---range.
OA TEMP nn
_
F (or
_
C) ---40 to 140
_
F
(---40 to 60
_
C)
OUTSIDE AIR TEMPERATRUE
Displays measured value of outdoor air temperature.
Displays --- --- --- --- --- --- if sensor sends invalid value, if not connected, short
or out---of---range.
OA HUM nn% 0 to 100% OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA enthalpy sensor.
RA TEMP nn
_
F (or
_
C) 0 to 140
_
F
(---18 to 60
_
C)
RETURN AIR TEMPERATRUE
(Accessory sensor required)
Displays measured value of return air temperature from RAT sensor.
RA HUM nn% 0 to 100% RETURN AIR RELATIVE HUMIDITY
(Accessory enthalpy sensor required)
Displays measured value of return air humidity from RA sensor.
IN CO2 ___ppm 0 to 2000 ppm SPACE/RETURN AIR CO2
(CO
2
sensor required, accessory or factory option)
Displays value of measured CO
2
from CO
2
sensor.
Invalid if not connected, short or out---of---range
DCV STATUS n/a ON/OFF DEMAND CONTROL VENTILATION STATUS
(CO
2
sensor required, accessory or factory option)
Displays ON if IN CO2 value above setpoint DCV SET and OFF if below
setpoint DCV SET.
DAMPER OUT 2.0V 2.0 to 10.0V Displays voltage output to the damper actuator.
0% = OSA Damper fully closed
100% = OSA Damper full open
See Menu Note 3.
ACT POS nn% 0 to 100% Displays actual position of outdoor air damper actuator
2.0V = OSA Damper fully---closed
10.0V = OSA Damper full open
ACT COUNT n/a 1 to 65535 Displays number of times actuator has cycled.
1 Cycle equals accrued 180
_
of actuator movement in any direction
ACTUATOR n/a OK/Alarm
(on Alarm menu)
Displays Error if voltage or torque is below actuator range
EXH1 OUT OFF ON/OFF EXHAUST STAGE 1 RELAY OUTPUT
Output of EXH1 terminal:
ON = relay closed
OFF = relay open