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Installation and Operating Instructions
EN
Messages on display
1 - Heat exchanger 1 over-
heated
3 - Pre-heater overheated
4 - Supply air fan error
5 - Extract air fan error
6 - Supply air filter blocked
7 - Extract air filter blocked
12 - Damage to CO2
sensor
16 - Supply - Damage to
external temp. sensor
(T-EXT1)
17 - Supply - Faulty
temperature sensor
behind recuperator
(T-EXT2)
18 - Supply - Faulty
temperature sensor
in supply air duct
(T-EXT3)
21 - Outlet - Faulty tempe-
rature sensor in outlet
duct (T-INT1)
22 - Outlet - Faulty protec-
tion recuperator temp.
sensor (T-INT2)
25 - Damage to room temp.
sensor (T_Room)
37 - Condensate drain
owerflow
74 - Flow reduction, mini-
mum temperature in
duct not reached
Decentralised ventilation unit – KWL
Unit behaviour
Problem
Heat exchanger overheating or a
Unit ventilates.
damaged sensor.
Pre-heater overheating or a
Unit ventilates.
damaged sensor
Fan overheating or damage
Unit does not ventilate.
to the supply air fan thermal
contacts.
Fan overheating or damage
Unit does not ventilate.
to the supply air fan thermal
contacts.
Unit ventilates.
Check filter contamination.
Unit ventilates.
Check filter contamination.
Unit ventilates.
Air quality sensor malfunction.
Faulty temperature sensor con-
Unit ventilates.
tact or faulty sensor.
Faulty temperature sensor con-
Unit ventilates.
tact or faulty sensor.
Faulty temperature sensor con-
Unit ventilates.
tact or faulty sensor.
Faulty temperature sensor con-
Unit ventilates.
tact or faulty sensor.
Faulty temperature sensor con-
Unit ventilates.
tact or faulty sensor.
Faulty room temperature sensor
Unit ventilates.
contact or faulty sensor.
Full tray of condensate.
Unit does not ventilate (fan
Faulty condensate pump.
OFF).
Clogged condensate drain.
Unit only has limited func-
Minimum temperature has not
tionality.
been reached in the duct.
®
Yoga Style/KWL
Troubleshooting
Check whether the air can flow freely through the system
and the heat exchanger is sufficiently cooled. Check whet-
her the safety thermostat for residual heat is damaged.
Check whether the air can flow freely through the system
and the heat exchanger is sufficiently cooled. Check whet-
her the safety thermostat for residual heat is damaged.
Pay attention to the cause of the motor overheating: de-
fective bearing, short circuit ...
Pay attention to the cause of the motor overheating: de-
fective bearing, short circuit, ...
If the filter has already been replaced or replacement was
not needed, filter contamination reset.
If the filter has already been replaced or replacement was
not needed, filter contamination reset.
Check quality sensor and its connection to the system.
Check sensor connection and have replaced if necessary
(specialist service).
Check sensor connection and have replaced if necessary
(specialist service).
Check sensor connection and have replaced if necessary
(specialist service).
Check sensor connection and have replaced if necessary
(specialist service).
Check sensor connection and have replaced if necessary
(specialist service).
Check sensor connection and have replaced if necessary
(specialist service).
Check the condensate drain and the bathtub to see if it is
actually full of water.
Check condensate pump functionality.
Check the condensate drain hoses.
The supply air and extract air temperature is too low. There
is a danger that the object will be undercooled or the air
pipes will condense. There may be a temperature sensor
error T-EXT3.
29
®
Yoga Style ET
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