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MENU
PARAMETER
CO2 SENS ERR
OA SYLK T ERR
OA SYLK H ERR
RA SYLK T ERR
RA SYLK H ERR
DA SYLK T ERR
OA SENS T ERR
ACT ERROR
FREEZE ALARM
ALARMS
(CONT)
SHUTDOWN ACTIVE
DMP CAL RUNNING
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 9 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example if
you do not have a DCV (CO
eters appear.
† When values are displayed, pressing and holding the
causes the display to automatically increment.
527 01 2701 00
Table 9 — W7220 Menu Structure* (cont)
PARAMETER
DEFAULT
VALUE
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
) sensor, then none of the DCV param-
2
or
Specifications subject to change without notice.
PARAMETER
RANGE AND
INCREMENT
†
CO
SENSOR ERROR
2
CO
sensor has failed, gone out of range or become disconnected -
2
check wiring then replace sensor if the alarm continues.
OUTSIDE AIR S-BUS SENSOR ERROR
Outdoor air enthalpy sensor has failed or become disconnected -
check wiring then replace sensor if the alarm continues.
RETURN AIR S-BUS SENSOR ERROR
Return air enthalpy sensor has failed or become disconnected - check
wiring then replace sensor if the alarm continues.
DISCHARGE AIR S-BUS SENSOR ERROR
Discharge air sensor has failed or become disconnected - check
wiring then replace sensor if the alarm continues.
OUTSIDE AIR TEMPERATURE SENSOR ERROR
Outdoor air temperature sensor has failed or become disconnected -
check wiring then replace if the alarm continues.
ACTUATOR ERROR
Actuator has failed or become disconnected - check for stall, 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
setpoint menu. Check if Mixed air temperature on STATUS menu is
below the Lo Setpoint on Advanced menu. When conditions are back
in normal range then the alarm will go away.
AUX2 IN is programmed for SHUTDOWN and 24 V has been applied
to AUX2 IN terminal.
DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, when the W7220 is
completing a calibration on the dampers, this alarm will display. Wait
until the calibration is completed and the alarm will go away. Must
have OA, MA and RA sensors for DCV calibration; set up in the
Advanced setup menu.
DISCHARGE AIR TEMPERATURE SENSOR ALARM
Discharge air temperature is out of the range set in the 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
sensors, etc.), the AUX1-O terminal has 24 Vac out.
ACTUATOR VOLTAGE LOW
Voltage received by actuator is above expected range.
ACTUATOR VOLTAGE HIGH
Voltage received by actuator is below expected range.
ACTUATOR STALLED
Actuator stopped before achieving commanded position.
** 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
Heating mode, the ERV terminal will be energized when the OA is
below the ERV OAT setpoint in the setpoint menu.
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 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
Multi-Speed unit operation:
EQUIPMENT = CONV
AUX2 IN = W
FAN SPEED = 2SPEED
button
NOTES
33
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