Table of Contents
Advertisement
MENU
PARAMETER
OA H CAL
RA T CAL
ADVANCED
RA H CAL
SETUP
(cont)
DA T CAL
2SP FAN DELAY
DAMPER MINIMUM
POSITION
DAMPER OPEN
DAMPER CLOSE
CHECKOUT
CONNECT Y1–O
CONNECT Y2–O
CONNECT AUX1-O
CONNECT EXH1
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
ALARMS
ACT ERROR
FREEZE ALARM
SHUTDOWN ACTIVE
DMP CAL RUNNING
DA SENS ALM
Table 12 — Menu Structure* (cont)
PARAMETER
PARAMETER
DEFAULT
RANGE AND
VALUE
INCREMENT
0% RH
±10% RH
0.0°F
±2.5 F
0% RH
±10% RH
0.0°F
±2.5 F
0 to 20 minutes in 1
5 Minutes
minute increments
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
N/A
N/A
N/A
N/A
N/A
N/A
†
OUTSIDE AIR HUMIDITY CALIBRATION
Allows for operator to adjust for an out of calibration humidity sensor.
RETURN AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration temperature
sensor.
RETURN AIR HUMIDITY CALIBRATION
Allows for operator to adjust for an out of calibration humidity sensor.
DISCHARGE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration temperature
sensor.
TIME DELAY ON SECOND STAGE ECONOMIZING
When in economizing mode this is the delay for the high speed fan to
try to satisfy the call for second stage cooling before the first stage
mechanical cooling is enabled.
The checkout for the damper minimum position is based on the
system.
Position damper to the full open position.
Exhaust fan contacts enable during the DAMPER OPEN test. Make
sure you pause in the mode to allow exhaust contacts to energize
due to the delay in the system.
Positions damper to the fully closed position
Closes the Y1-O relay (Y1-O)
Closes the Y2-O relay (Y2-O)
Energizes the AUX output. If Aux setting is:
• NONE — not action taken
• ERV — 24 Vac out. Turns on or signals an ERV that the conditions
are not good for economizing but are for ERV operation.
• SYS — 24 Vac out. Issues a system alarm
Closes the power exhaust fan 2 relay (EXH1)
SUPPLY AIR TEMPERATURE SENSOR ERROR
Mixed air sensor has failed or become disconnected - check wiring
then replace sensor if the alarm continues.
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.
36
NOTES
††
Advertisement
Table of Contents
