Carrier WeatherMaster 48HC Series Installation Instructions Manual page 48

MENU
FREEZE ALARM
SHUTDOWN ACTIVE
DMP CAL RUNNING
ALARMS
(cont)
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 13 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example if you
do not have a DCV (CO
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 14 — Damper Minimum Position Settings and Readings on Checkout Menu
FAN SPEED
1
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Table 13 — W7220 Menu Structure* (cont)
PARAMETER
PARAMETER DEFAULT
VALUE
ACT ERROR N/A
N/A
N/A
N/A
DA SENS ALM N/A
SYS ALARM N/A
ACT UNDER V N/A
ACT OVER V N/A
ACT STALLED N/A
) sensor, then none of the DCV parameters
2
DEMAND CONTROLLED
VENTILATION
(CO SENSOR)
2
NO
YES
search engine
PARAMETER
RANGE AND
INCREMENT †
ACTUATOR ERROR
Actuator has failed or become disconnected - check for stall,
N/A over voltage, under voltage and actuator count. Replace actuator
if damper is movable and supply voltage is between 21.6 V and
26.4 V. Check actuator count on STATUS menu.
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 sig-
nal originates with a thermostat or other controller call for indoor
fan operation at CTB terminal G. This signal passes through the
Central Terminal 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 roof-
top units, the economizer control sensor is located downstream of
the evaporator/indoor coil in the supply fan section where this sen-
sor 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 14. For dry bulb operation with or without DCV,
or button
see Tables 15 and 16. For enthalpy operation with or without
DCV, see Tables 17 and 18.
SETPOINTS
MIN POS
N/A
VENT MIN
VENT MAX
48
EXPANDED PARAMETER NAME
Notes
CHECKOUT
VMAX–HS
N/A
VMAX–HS
VMAX–HS