321

No.

Description

1

Free Cooling LED

2

Sensor LED

3

DAC LED

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

-

-

Sensors working ok

-

Green On

-

Humidity sensor error

-

Yellow On

-

CO2 sensor error

-

LED Off

-

Air temperature failure/fault

-

Red On

-

Excess outdoor air

-

Red Blinking

-

Damper working ok

-

-

Green On

Damper stalled

-

-

Red On

Damper slippage

-

-

Red Blinking

Actuator alarm is reported

-

-

Fast Red Blinking

Terminal ACT-FB is configured but no available feedback signal (under-range or over-range)

-

-

LED Off

NOTICE

If different faulty events occur at the same time, sensor/DAC LED lights up following the priority below: Red (Fast Blinking) -> Red (On, Steady) -> Red (Blinking) -> Yellow -> Off -> Green. For example, if there is a humidity sensor error and air temperature failure at the same time, the sensor LED turns red rather than yellow.

After the Economizer controller enters the running state, it may take one minute for peripheral devices to complete initialization. Before that, LED indication might be unstable.