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MENU
PARAMETER
Alarms display only when they are active. The menu title "ALARMS(#)" includes the number of active alarms in parenthesis ( ). When using SYLK bus
sensors, "SYLK" will appear on the screen, and when using 20k OA temperature sensors, "SENS T" will appear on the screen
MA T SENS ERR
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
ALARMS
FREEZE ALARM
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 6 — Menu Structure (cont)
PARAMETER
PARAMETER RANGE AND
DEFAULT
INCREMENT
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
N/A
N/A
18
Mixed air sensor has failed or become disconnected -
check wiring then replace sensor if the alarm continues.
CO
sensor has failed, gone out of range or become
2
disconnected - check wiring then replace sensor if the
alarm continues.
Outdoor air enthalpy sensor has failed or become
disconnected - check wiring then replace sensor if the
alarm continues.
Return air enthalpy sensor has failed or become
disconnected - check wiring then replace sensor if the
alarm continues.
Discharge air sensor has failed or become
disconnected - check wiring then replace sensor if the
alarm continues.
Outdoor air temperature sensor has failed or become
disconnected - check wiring then replace if the alarm
continues.
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 Low
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 AUX 2IN terminal.
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 is out of the range set in the
ADVANCED SETUP Menu. Check the temperature of
the discharge air.
When AUX1-0 is set to SYS and there is any alarm
(e.g., failed sensors, etc.), the AUX1-0 terminal has 24
Vac out.
Voltage received by actuator is above expected range.
Voltage received by actuator is below expected range.
Actuator stopped before achieving commanded
position.
NOTES:
1. Table 6 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.
2. When values are displayed, pressing and holding the
button causes the display to automatically increment.
3. N/A = Not Applicable.
4. 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
) sensor, then none of the DCV
2
or
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