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Using the mode button, you can make the mode (Heat, cool and fan) selection. If the fan button is pressed,
makes of the fresh air fan speed control (1 / 2 / 3 / 4 / 5-automatic). When the fan button is second pressed,
makes of the exhaust fan speed control (1 / 2 / 3 / 4 / 5-automatic). If fans are running automatically, (
A
) icon
appears on the screen. Fans automatically run in heating and cooling mode. Air quality and CO
2
sensors have
to be connected for automatic run of the fans.
While in fan mode
, fans don’t automatically run. If the fans automatically run in different modes, when switched
to fan mode automatic run is stop. Steps manually set with controller.
Electronical Controller Functions:
–
Device ON / OFF
–
Stage control of FAN1( fresh air fan) (OFF / 1 / 2 / 3 / 4 / 5 / AUTO)
–
Stage control of FAN2( exhaust fan) (OFF / 1 / 2 / 3 / 4 / 5 / AUTO)
–
Heat, cool and fan mode
Note: When electrical heater is working, FAN1 or the device is shutdown; FAN1 will work at stage 5 for 30
seconds to cool electrical heater. Electrical heater will not work when FAN1 is OFF.
Electrical heater only runs in the heat mode which runs automatically depends on the room temperature and
set point. When the heater runs in step one
“ST 1” icon appears on the screen. When the heater runs in step
two
“ST 1+2” icon appears on the screen. Fresh air fan will run at step 5 for 30 seconds to cool electrical heater.
Electrical heater will not run when fresh air fan is off.
SEC electronical controller can perform device ON / OFF from the dry contact information it gets from the
building automation system or similar system (VRV, VRF controller, timer etc.). By a dry contact on the relay
card connected to the BMS input; when dry contact is ON (short circuit) the device is activated and starts to
work in the position where previous closed. In this case, by using the front panel interfering device ON /OFF
equipment position change operations can be performed. When the dry contact is off, the device closes down
and you can’t interfere to the device from the front panel.
When the optional filter sensor detects the dirty filter,
‘’AL 03’’ warning will be shown on screen. When this
warning is shown, the device will run properly, however the warning will be shown until the filters are cleaned.
Optionally, there is a system which prevents freezing plated energy recovery under low temperature. When
icing is determined in the plated heat exchanger, fresh air fan will stop and exhaust fan will work at maximum
stage for defrosting. After defrosting, the device will return to its normal working conditions. Under these
circumstances ‘’AL 07’’ will be shown on screen. Commands from the front panel will not run.
Optionally, there is By-pass damper control. Damper will be automatically ON or OFF position depending on
the outdoor and room temperature information. If fan is selected in by MODE the damper is OFF.
Optionally, there is a control of air quality.
The fan in AUTO (FAN1, FAN2 or BOTH) changes fan speed according to the information from sensors.
