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FläktGroup
DC_9355GB 20180119_R0
We reserve the right to make changes without prior notice
When the red LED on the handheld terminal starts to flash
an alarm has been generated. To check the alarm, press
the alarm button (4) once. Detailed information is displayed.
To reset the alarm press the button again and reset it
by changing Confirm/Reset to Active. If the LED lights
continuously an alarm persists.
General fault-tracing
1. Read off the alarm from the handheld terminal.
2. Check the connections on terminal blocks and quick
connectors.
Alarm guide
3. Check the component from which the alarm was
generated.
4. Check the connection of the component.
5. Check the contact function on the digital alarms
in the controller, and compare them with the
drawing and component.
6. Check the parameter settings. Below is a list of
possible error messages and proposed corrective
actions/causes.
Alarms
Alarm text
Cause
Action
Type
Fire alarm
Fire alarm:
Alarm
Terminal blocks 73-74 in
control cabinet indicate
alarm, normally caused by
alarm from fire control unit.
• Check connected fire control unit.
• Check contact function for digital
input 5, compare with function
obtained from fire control unit .
A
Fire alarm 2
Fire alarm input 2
Terminal blocks 127-128
in control cabinet indicate
alarm, normally caused by
alarm from fire control unit.
• Check connected fire control unit
• Check contact function for digital input 5,
compare with function
obtained from fire control unit
A
Calibration active
mixing
Active mixing
calibration: Alarm
Needed calibration for
active mixing not done
Execute the calibration sequence for active
mixing. See page [page for active mixing]
C
Hex pressure alarm
HEX pressure drop The measured value from
the differential pressure
sensor over the heat
recovery wheel is outside
the permitted range.
• Check the measured value using the
handheld terminal
• Check the setting in the differential pressure
sensor and calibrate it
• Check connections
• Check that the cables are intact
A
Balance pressure
alarm
Balance pressure
The measured value from
the differential pressure
sensor over the mixing
damper is outside the
permitted range.
• Check the measured value using the hand-
held terminal
• Check the setting in the differential pressure
sensor and calibrate it
• Check connections
• Check that the cables are intact
A
Communication
alarm
Com.Alarm
Sply.fan
Com.Alarm
Exh.fan
Com.Alarm
Sensors
Com.Alarm
Rev.Cooler
Sensor or function on
Modbus can not commu-
nicate with the controller.
• Control the signal cable that all connections
is connected.
B
Alarm pump heating
Htg pump alarm:
Alarm
Terminal blocks 67-68 in
control cabinet indicate
alarm, normally caused by
the motor protection in the
heating water circulation
pump.
• Check motor protection in heating
circulation pump.
• Check contact function for digital
input 2, compare with function
obtained from pump.
B
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