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AUTOMATION AND CONTROLLER FOR UNITS EVO-T; EVO-T COMPACT
OPERATION AND MAINTENANCE MANUAL
Alarms
Alarm
type
System response, action / Alarms list
A_Com
ExhFC
Fading
Communication inspection of the controller and air
exhaust fan inverter or EC motor controller:
Normal condition – no alarm, correct communication
Alarm condition – alarm triggered, incorrect communication
Response to the alarm condition: the system is stopped,
check the inverter and its connection to the controller or air
exhaust EC motor controller, nd out the problem source,
once the problem is eliminated the system resumes operation
automatically.
A_Com
ExhFC2
Fading
Communication inspection of the controller and air
exhaust fan secondary inverter or EC motor controller 2:
Normal condition – no alarm, correct communication
Alarm condition – alarm triggered, incorrect communication
Response to the alarm condition: the system is stopped,
check the inverter and its connection to the controller or air
exhaust EC motor controller, nd out the problem source,
once the problem is eliminated the system resumes operation
automatically.
A_Low
Temp
Blocking
Inspecting suciently high air supply temperature:
Normal condition – no alarm, air supply temperature is mainta-
ined above the min level
Alarm condition – alarm triggered, air supply temperature below
preset level within dened time
Response to the alarm condition: the system is stopped, check the heat
exchangers and system operation, once the problem is eliminated
conrm the alarm and start the system.
A_UV_
Lamp
Time
Fading
Checking for exceeding the allowed operating time of
UV lamps:
Normal condition- no alarm, UV lamp run time is lower than the li-
mit set in Service Menu/Running Timer/A_UV_LampTime/Limit
Alarm condition - alarm occurs, UV lamp operating time is higher
than the limit set in the Service menu/Running Timer/A_UV_
LampTime/Limit
Response to Alarm condition: information alarm, replace UV
lamps, after replacing the lamps the operating time counter
has to be reset
A_Code Fading
Checking the selected code:
Normal condition – no alarm, you can proceed to the system
setup and activation
Alarm condition – alarm triggered, the system is blocked till a cor-
rect application code is entered (codes are provided in the Tab No8)
Response to the alarm condition: the system is blocked, once a
correct alarm code is set the alarm is reset automatically.
A_In_
Emul
Fading
Input emulation:
Normal condition – no alarm, no input in emulation mode
Alarm condition – at least one digital, analog or PT1000 input
is in emulation mode
Response to the alarm condition: the controller does not respond
to physical changes of the emulated input, the system operates
with a emulator value in the service menu.
A_Out-
Force
Fading
Forcing outputs:
Normal condition – no alarm, no output in the forcing mode
Alarm condition – at least one digital or analog output is in the
forcing mode
Response to the alarm condition: the system operates however
the forced output does not respond to the control algorithm, it is
set with the „Output forcing” menu in the service menu.
Operation in the forcing or emulation mode
can lead to the AHU damage (fault of the user).
Changing in-puts/outputs in the forcing or em-
ulation mode can be performed only by quali-
ed personnel and this function can be carried
out only for testing or start up purposes.
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