R2.060219
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27
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Alarm
Modbus
register - bit
(LSB)
Cause
Action
T1, T2...T9
sensor fault*
3x6136-6
3x6137-6
Sensor reading is out of
range.
The ventilation unit runs in a restricted operating mode. Check
cable connections and configuration. Change sensor if faulty.
Post heater
fail (*)
3x6136-0
3x6137-0
Post heater control di-
agnostics has detected
open circuit or control
fail.
The ventilation unit runs normally but post heating may not work.
Check manual overheating protection. Check post heating
circuit.
Preheater fail
(*)
3x6136-1
3x6137-1
Preheater control di-
agnostics has detected
open circuit or control
fail.
The ventilation unit runs normally but preheating may not work.
Check manual overheating protection. Check preheating
circuit.
Water radia-
tor freezing
warning
3x6136-3
3x6137-3
Water temperature is
critically low (12 °C) and
outdoor temperature is
below 0 °C.
The ventilation unit runs normally but freezing protection is ac-
tivated (electrical heater is activated and valve is fully opened).
If water temperature is below 10 °C the unit is stopped. Unit is
started when water temperature rises over 15 °C.
Ensure that the heating system circulation pump is running
and the water is warm.
Supply fan
fail
3x6136-4
3x6137-4
No fan speed signal.
The ventilation unit runs normally.
Check fan and cabling.
Extract fan
fail
3x6136-5
3x6137-5
No fan speed signal.
The ventilation unit runs normally.
Check fan and cabling.
Connection
fail
Control panel does
not communicate with
ventilation unit.
Restart the ventilation unit.
Check cabling. Test other connector.
Emergency
stop
3x6136-7
Emergency stop or
emergency stop resetta-
ble input activated.
The ventilation unit is stopped by the emergency stop function.
The emergency stop alarm is reset and unit is started when
the input is deactivated.
The emergency stop resettable alarm is reset from user panel.
Internal
failure
3x6136-10
3x6137-10
Internal temperature
critical high. Memory
read error.
The ventilation unit runs in a restricted operating mode.
Restart the ventilation unit.
Rotor fail
3x6136-14
3x6137-14
No rotor speed signal.
The ventilation unit runs normally.
Check rotor motor, belt and cabling.
Fan control
3x6136-15
3x6137-15
Constant duct pressure
control error.
The ventilation unit runs normally but without constant duct
pressure control.
Check pressure measurement and settings in commissioning
mode.
Supply air
hot*
3x6136-12
3x6137-12
Supply air temperature
critical high (50 °C).
The ventilation unit runs normally but all electrical heaters are
controlled off.
Inspect the cause for high temperature. Do not use the unit
before problem detected and fixed.
Supply air
cold*
3x6136-11
3x6137-11
Supply air temperature
critical low (10 °C) over
5 minutes.
The ventilation unit is stopped.
The unit is started when supply temperature rises over 10 °C.
Internal
overheat
3x6136-13
3x6137-13
Internal temperature
critical high (50 °C).
The ventilation unit runs normally but all electrical heaters are
controlled off.
Inspect the cause for high temperature. Do not use the unit
before problem detected and fixed.
Elect. pre-
heater fail
3x6136-2
3x6137-2
External electrical pre-
heater control fail.
The ventilation unit runs normally.
Check over heating protection, cabling and settings.
External
alarm
3x6138-1
External alarm input is
active.
The ventilation unit runs normally.
Service
reminder*
3x6137-9
Service interval has
elapsed.
Service the ventilation unit and reset the service reminder.
7.4 Alarm descriptions
*) Indicated in Smart cooker hood
