15
Fig. 29 — Powering the Economizer Controller
Fig. 30 — Menu Structure Descriptions
Fig. 31 — LED Indication
p
Functions
FREE COOLING ECONOMIZING
Free cooling uses unconditioned outside air to cool the space di-
rectly. The economizer controller enables or disables free cooling
after it judges which control mode is active. It also uses hysteresis
to ensure a smooth switchover.
Depending on the sensors that are used, there are four different
control modes. In different control modes, the assessed conditions
are different. See Table
10.
DEFAULT HYSTERESIS SETTING
Hysteresis setting (DB) defaults to 2°F. Refer to Fig. 32.
Fig. 32 — Hysteresis Settings
No. Description
1 Number representing the first-level menu of Status Display. Different
numbers represent different menus:
1: Status Display
2: Basic Settings
3: Advanced Settings
4: Alarms
5: Enter Configuration State and Reset
6: I/O Config
7: Testing
8: Enter Running State
2 Submenu*
3 Value of the current submenu*
12 3
*See Setup and Configuration for detailed submenus together with
possible values or ranges.
NO. DESCRIPTION
1 Free Cooling LED
2 Sensor LED
3 DAC LED
Table 9 — LED Indication
STATUS
FREE
COOLING
LED
SENSOR
LED
DAC LED
Commissioning mode
Yellow
Blinking
Yellow
Blinking
Yellow
Blinking
Power start up Yellow On Yellow On Yellow On
Free cooling is running Green On — —
Free cooling is available
but not running
Green
Blinking
——
Not economizing when it
should
Red Blinking — —
Economizing when it
should not
Red On — —
Sensor working okay — Green On —
Humidity sensor error —Yellow On—
CO
2
sensor error —LED Off—
Air temperature fault/failure — Red On —
Excess outdoor air —
Red
Blinking
—
Damper working okay — — Green On
Damper not modulating — — Red On
Damper slippage ——
Red
Blinking
Damper unplugged ——
Fast Red
Blinking
Terminal ACT-FB is
configured but no available
feedback signal
——LED Off
On
Off
ShutOff SP OAT
DB
LEGEND
OAT — Outside Air Temperature
DB — Deadband
SP — Set Point
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