12
Table 11 - Damper Position Control, 2-Speed Fan Motor, Economizer Cooling Not Available
INPUT
OCC
0 - V
24 - V
24 - V
24 - V
24 - V
Y1
0 - V
0 - V
24 - V
24 - V
0 - V
Y2
0 - V
0 - V
0 - V
24 - V
0 - V
W1
0 - V
0 - V
0 - V
0 - V
24 - V
SUPPLY FAN
MOTOR SPEED
OFF
LOW
LOW
HIGH
HIGH
DAMPER POSITION
NO CI2 SENSOR
CLOSED
MIN POS
MIN POS
MIN POS
MIN POS
W/ CO2 SENSOR
CLOSED
FROM
VENTMIN L
TO
VENTMAX L
FROM
VENTMIN L
TO
VENTMAX L
FROM
VENTMIN H
TO
VENTMAX H
FROM
VENTMIN H
TO
VENTMAX H
TROUBLESHOOTING
Power Loss (Outage or Brownout)
All setpoints and advanced settings are restored after any power loss
or interruption, as all settings are stored in the Economizer controller’s
non-volatile flash memory.
NOTE
If the power goes below 18 Vac, the W7220 controller module
assumes a power loss and the 5 minute power up delay will become
functional when power returns above 18 Vac.
Alarms
The Economizer module provides alarm messages that display on the
2-line LCD
NOTE:
Upon power up, the module waits several seconds before
checking for alarms. This allows time for all the configured devices
(e.g. sensors, actuator) to become operational.
If one or more alarms are present and there has been no keypad activity
for at least 5 minutes, the Alarms menu displays and cycles through the
active alarms.
You can also navigate to the Alarms menus at any time.
See Table 5 on Page 6 for the Alarms menu.
Clearing Alarms
Once the alarm has been identified and the cause has been removed (e.g.
replaced faulty sensor). The can be cleared from the display.
To clear an alarm, perform the following:
1. Navigate to the desired alarm.
2. Press the button.
3. ERASE? displays.
4. Press the button.
5. ALARM ERASED displays.
6. Press the ↑ (Menu up/Exit) button to complete the action and
return to the previous menu.
NOTE:
If the alarm still exists after you clear it, it is redisplayed
within 5 seconds.
