Carrier 50FC A04 Series, Service And Maintenance Instructions, Page: 43 / 112

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Table 12 — W7220 Menu Structure *
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT †
NOTES
STATUS
ECONO AVAIL NO YES/NO FIRST STAGE COOLING DEMAND (Y1–IN)
YES = economizing available; the system can use outside air for free
cooling when required
ECONOMIZING NO YES/NO FIRST STAGE COOLING RELAY OUTPUT
YES = outside air being used for 1 stage cooling
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** COOL
HEAT
HEAT PUMP MODE
Displays COOL or HEAT when system is set to heat pump
(Non-conventional)
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 = 0 Vac on terminal Y1–I
COOL Y1—OUT OFF ON/OFF FIRST STAGE COOLING RELAY OUTPUT
Cool stage 1 Relay Output to stage 1 mechanical cooling
(Y1–OUT terminal)
COOL Y2—IN OFF ON/OFF SECOND STAGE COOLING DEMAND (Y2–IN)
Y2–I signal from space thermostat our unitary controller for second
stage cooling.
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
Cool Stage 2 Relay Output to mechanical cooling
(Y2–OUT terminal)
MA TEMP _ _ . _ F 0 to 140 F SUPPLY AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed air from MAT sensor.
Displays _ _ . _ F if not connected, short or out-of-range.
DA TEMP _ _ . _ F 0 to 140 F DISCHARGE AIR TEMPERATURE, after Heating section
Displays when Discharge Air sensor is connected and displays
measured discharge temperature.
Displays _ _ . _F if sensor sends invalid value, if not connected, short
or out-of-range.
OA TEMP _ _ . _ F -40 to 140 F OUTSIDE AIR TEMP
Displays measured value of outdoor air temperature.
Displays _ _ . _F if sensor sends invalid value, short or out-of-range.
OA HUM _ _ % 0 to 100% OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA sensor.
Displays _ _% if not connected short, or out-of-range.
RA TEMP _ _ . _ F 0 to 140 F RETURN AIR TEMPERATURE
Displays measured value of return air temperature from
RAT sensor.
Displays _ _ . _ F if sensor sends invalid value, if not connected, short
or out-of-range
RA HUM _ _ % 0 to 100% RETURN AIR RELATIVE HUMIDITY
Displays measured value of return air humidity from RA sensor.
Displays _ _% if sensor sends invalid value, if not connected, short or
out-of-range
IN CO2 _ _ _ ppm 0 to 2000 ppm SPACE/RETURN AIR CO
2
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 CONTROLLED VENTILATION STATUS
Displays ON if above setpoint and OFF if below setpoint, and ONLY if
a CO
2
sensor is connected.
DAMPER OUT 2.0v 2.0 to 10.0v Displays voltage output to the damper actuator.
ACT POS N/A 0 to 100% Displays actual position of outdoor air damper actuator
ACT COUNT N/A 1 to 65535 Displays number of times actuator has cycled.
1 cycles equals 180 deg. 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
EXH2 OUT OFF ON/OFF EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX terminal; displays only if AUX = EXH2
ERV OFF ON/OFF ENERGY RECOVERY VENTILATOR
Output of AUX terminal; displays only if AUX = ERV