Carrier WeatherExpert 50LC 07 Series Installation Instructions Manual page 36

MENU PARAMETER
FREEZE ALARM
SHUTDOWN ACTIVE
DMP CAL RUNNING
ALARMS
(cont)
DA SENS ALM
SYS ALARM
ACT UNDER V
ACT OVER V
ACT STALLED
LEGEND
CLO — Compressor Lockout
ERV — Energy Recovery Ventilator
LCD — Liquid Crystal Display
MA — Mixed Air
MAT — Mixed Air Temperature
N/A — Not Applicable
OA — Outdoor Air
OAT — Outdoor Air Temperature
OCC — Occupied
RA — Return Air
RAT — Return Air Temperature
RTU — Rooftop Unit
SYS — System
* Table 10 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example, if
you do not have a DCV (CO
parameters appear.
† When values are displayed, pressing and holding the
causes the display to automatically increment.
** N/A = Not Applicable.
†† ERV Operation: When in cooling mode AND the conditions are NOT
OK for economizing - the ERV terminal will be energized. In the Heat-
ing mode, the ERV terminal will be energized when the OA is below
the ERV OAT set point in the set point menu.
*** After 10 minutes without a command or mode change, the controller
will change to normal operation.
Table 11 — Damper Minimum Position Settings and Readings on Checkout Menu
FAN SPEED
1
1
2
2
1
1
2
2
2
2
Table 10 — W7220 Menu Structure* (cont)
PARAMETER
DEFAULT
VALUE
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
) sensor, then none of the DCV
2
or
DEMAND CONTROLLED
VENTILATION
(CO SENSOR)
2
NO
YES
PARAMETER
RANGE AND
INCREMENT †
Check if outdoor temperature is below the LOW Temp Lockout on
set point menu. Check if Mixed air temperature on STATUS
N/A
menu is below the Lo Set point on Advanced menu. When
conditions are back in normal range, the alarm will go away.
AUX2 IN is programmed for SHUTDOWN and 24 V has been
N/A
applied to AUX2 IN terminal.
DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, this alarm will display
when the W7220 is completing a calibration on the dampers.
N/A
Wait until the calibration is completed and the alarm will go away.
Must have OA, MA and RA sensors for DCV calibration; set up is
in the Advanced setup menu.
DISCHARGE AIR TEMPERATURE SENSOR ALARM
Discharge air temperature is out of the range set in the
N/A
ADVANCED SETUP Menu. Check the temperature of the
discharge air.
When AUX1-O is set to SYS and there is any alarm (e.g., failed
N/A
sensors, etc.), the AUX1-O terminal has 24 vac out.
ACTUATOR VOLTAGE LOW
N/A
Voltage received by actuator is above expected range.
ACTUATOR VOLTAGE HIGH
N/A
Voltage received by actuator is below expected range.
ACTUATOR STALLED
N/A
Actuator stopped before achieving commanded position.
NOTES:
1. STATUS —> OCCUPIED — The factory-standard Occupancy
signal originates with a thermostat or other controller call for
indoor fan operation at UCB terminal G. This signal passes
through the Unit Control Board's OCCUPANCY jumper to the
ECONO connector and to the W7220's OCC input terminal. An
external timeclock or relay is required to implement an
Occupancy schedule on the economizer damper position.
2. STATUS —> MA TEMP, SETPOINTS —> MAT SET — The W7220
menu parameters and labels include designations MA, MAT and
Mixed Air for the economizer cooling control sensor. On these
rooftop units, the economizer control sensor is located downstream
of the evaporator/indoor coil in the supply fan section where this
sensor is designated as Supply Air Temperature (SAT) sensor.
3. SETPOINTS —> DRYBLB SET — This point is not displayed if a
Return Air (differential) temperature sensor or an Outdoor Air
enthalpy sensor is connected.
4. SYSTEM SETUP parameters must be configured as noted for 2-
Speed unit operation:
EQUIPMENT = CONV
AUX2 I = W
FAN SPEED = 2SPEED
For damper minimum position settings and checkout menu read-
ings, see Table 11. For dry bulb operation with a 1-speed indoor
button
fan, with or without DCV, see Tables 12 and 13. For enthalpy op-
eration with a 1-speed indoor fan, with or without DCV, see
Tables 14 and 15. For dry bulb operation with a 2 speed indoor
fan, with or without DCV, see Tables 16 and 17. For enthalpy op-
eration with a 2 speed indoor fan, with or without DCV, see
Tables 18 and 19.
SETPOINTS
MIN POS
N/A
MIN POS H
MIN POS L
VENT MIN
VENT MAX
VENT MIN H
VENT MAX H
VENT MIN L
VENT MAX L
36
EXPANDED PARAMETER NAME
Notes
CHECKOUT
VMAX–HS
N/A
VMAX–HS
VMAX–LS
VMAX–HS
VMAX–HS
VMAX–HS
VMAX–LS
N/A
N/A