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2. Remote switches can be connected to unit PCB (See wiring diagram). To activate and deactivate the boost
function caution should be taken as this connection is rated at 230 V AC.
Note 1: Boost speed and boost time are changeable when using the digital controller only.
Note 2: During operating at boost function on basic controller, "high" (H), "medium" (M) and "low" (L) speed led
are on at the same time.
10.4. Warnings
There are three types of warnings on basic controller:
1. If red warning signal light is continuous, this indicates fan failure or outdoor air thermistor failure. (Unit is not
working.)
2. If red warning signal and fan speed led lights simultaneously, this indicates failure of components. (Only fans
are running.)
3. If red warning signal flashes, it is an alarm of dirty filter.
Screen failure code is "ERR" on digital controller. (See failure code list.)
Note: After troubleshooting, press
10.5. Child Proof Protection Function
It is used to lock the keypad of the controller. (See use of keypad.)
Note: Child proof protection is available on digital controller.
10.6. Sensor (VOD) (Optional accessories)
Sensor (VOD) function is available on digital controller only. It runs with CO2 sensor, air quality sensor or humidity
sensor. The fan speed changes automatically according to the information coming from these sensors.
The dry contact represents a volt free contact which is used, in this case, to boost the unit.
There is one dry contact relay input on the PCB. If the input is activated from a switch installed (turn on the
switch), the unit will run at "boost" speed. When the input is passive again (turn off the switch), the unit runs at
the speed value it was set before the switch was turned on. See input output connection below. For light switch
connection, see relay contact connection below.
www.airflow.com
AND MAİNTENANCE MANUAL
on basic controller and
USER
on digital controller for 3 seconds.
13
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