Fault Causes - Helios KWL Yoga 700 Montage- Und Betriebsvorschrift

Installation and Operating Instructions
Messages on display
1 - Heat exchanger 1 over-
Unit ventilates.
heated
3 - Pre-heater overheated Unit ventilates.
4 - Supply air fan error Unit does not function.
5 - Extract air fan error Unit does not function.
6 - Supply air filter blocked Unit ventilates.
7 - Extract air filter blocked Unit ventilates.
12 - Damage to CO2
Unit ventilates.
sensor
16 - Supply - Damage to
external temp. sensor Unit ventilates.
(T-EXT1)
17 - Supply - Faulty
temperature sensor
Unit ventilates.
behind recuperator
(T-EXT2)
18 - Supply - Faulty
temperature sensor
Unit ventilates.
in supply air duct
(T-EXT3)
21 - Outlet - Faulty tempe-
rature sensor in outlet Unit ventilates.
duct (T-INT1)
22 - Outlet - Faulty protec-
tion recuperator temp. Unit ventilates.
sensor (T-INT2)
25 - Damage to room temp.
Unit ventilates.
sensor (T_Room)
74 - Flow reduction, mini-
Unit only has limited func-
mum temperature in
tionality.
duct not reached
Decentralised ventilation unit – KWL
7 .2

Fault causes

Error messages are indicated via the display on the controller. Tapping the exclamation mark will display information on
the respective error, see table.
Unit behaviour Problem
Heat exchanger overheating or
a damaged sensor.
Pre-heater overheating or a
damaged sensor
Fan overheating or damage
to the supply air fan thermal
contacts.
Fan overheating or damage
to the supply air fan thermal
contacts.
Check filter contamination.
Check filter contamination.
Air quality sensor malfunction.
Faulty temperature sensor con-
tact or faulty sensor.
Faulty temperature sensor con-
tact or faulty sensor.
Faulty temperature sensor con-
tact or faulty sensor.
Faulty temperature sensor con-
tact or faulty sensor.
Faulty temperature sensor con-
tact or faulty sensor.
Faulty room temperature sensor
contact or faulty sensor.
Minimum temperature has not
been reached in the duct.
® Yoga / 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:
defective bearing, short circuit ...
Pay attention to the cause of the motor overheating:
defective 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).
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.
33
® Yoga Style