Operation Failures / Alarms - Helios KWL 500 W ET Notice De Montage Et D'utilisation

OPERATION FAILURES / ALARMS

SYMPTOM
1
Outdoor air is cool when ente­
ring the house.
2
The supply air fan keeps stopping.
3 The supply air fan stops and starts
too frequently.
4
The maintenance reminder symbol
( ) is displayed and the unit
operates otherwise normally
"Exhaust air sensor fault" message is
5
displayed and the unit is stopped
6
"Supply air sensor fault" message is
displayed and the unit is stopped
7 "Extract air sensor fault" message is
displayed and the unit is stopped
8 "Outdoor air sensor fault" message is
displayed and the unit is stopped
9
"Bus fault" message is displayed
and unit runs at fan speed 1.
(check ventilation level)
10
The desired automatic adjustment
does not stay activated.
11
The unit is deaf, the fans do not
rotate, and none of the indicator
lamps of the control panel is lit.
12
The unit does not obey the control
panel.
13
"Carbon dioxide alarm!!" message
is displayed and the unit is stopped
Service und Information
D HELIOS Ventilatoren GmbH & Co · Lupfenstraße 8 · 78056 VS-Schwenningen
CH HELIOS Ventilatoren AG · Steinackerstraße 36 · 8902 Urdorf/Zürich
A HELIOS Ventilatoren · Postfach 854 · Siemensstraße 15 · 6023 Innsbruck
CAUSE
• Air cools down in the attic ducts.
• The heat recovery cell has frozen, and extract air
cannot heat outdoor air.
• The extract air filter or the cell is clogged.
• The initial adjustments for ventilation have not been
made.
• Sensor broken.
• Stopping of the supply air fan is active.
NOTE! If you decrease the threshold by too much,
the cell may freeze. See item 1 on this page.
• The difference between the stopping and starting
temperatures is too small.
• The maintenance reminder lights up the mainte­
nance reminder symbol in the main display of
the control panel at an interval of approximately
4 months (factory setting).
• You may change the interval (see the instructions
for using the control panel, Section 1.3.21.).
• There is a fault in the exaust air sensor.
• There is a fault in the supply air sensor.
• There is a fault in the extract air sensor.
• There is a fault in the outdoor air sensor.
• There is a wiring fault in the CO
the control panel.
• There is a fault in the humidity sensor, pressure
sensor or CO sensor; one of the sensors is bro­
2
ken or missing.
• The door switch may be broken or has not
closed properly.
• The socket is dead; the fuse may have
burned out, for instance.
• The glass tube fuse protecting the internal
electronics of the unit (located on the control
board behind the protective plate) may have
burned out.
• CO alarm. Carbon dioxide content has excee­
2
ded 5000 ppm for more than two minutes.
This may be because of a fire, for instance.
METHODE/DO THIS
• Check the insulation of the attic ducts.
• If the heat recovery cell has frozen, check the defrosting protection
setpoint. You may increase the setpoint by 1 or 2 °C, or you can bend
the sensor closer to the cell, which causes the supply air fan to stop
earlier (see the instructions for using the control panel, Section 1.3.20).
Defrost the cell before closing the door.
• Check the cleanliness of the filters and the heat recovery cell.
• The fan stops less often and the efficiency of the heat recovery cell
isenhanced, if the setpoint is decreased by 1 or 2 °C. (See the
instructions for using the control panel, Section 1.3.23.).
• Increase the difference by 1 or 2 °C, thereby lengthening the interval
between the stopping and starting of the supply air fan.
(See the instructions for using the control panel, Section 1.3.22).
• Check the cleanliness of the filters and the unit, and clean or replace
the filters, if needed.
• Acknowledge the maintenance reminder symbol to make it disap­
pear. (see the instructions for using the control panel, Section
1.3.10.).
• Contact a service representative. The sensor mounting has to be
checked, and the sensor has to be replaced, if necessary.
• Contact a service representative. The sensor mounting has to be
checked, and the sensor has to be replaced, if necessary.
• Contact a service representative. The sensor mounting has to be
checked, and the sensor has to be replaced, if necessary.
• Contact a service representative. The sensor mounting has to be
checked, and the sensor has to be replaced, if necessary.
sensor, or in • Contact a service representative. The sensor mounting has to be
2
checked, and the sensor has to be replaced, if necessary.
• Contact a service representative. The mounting and couplings of the
sensors have to be checked. (The sensors are optional.)
• Check the door switch and the fuses. The unit has a glass tube fuse,
T800mA.
• If needed, contact a service representative (in order to check the glass
tube fuse, for instance).
• Remove the plug from the wall outlet, wait for 30 seconds and put it
back. If this does not help, contact a service representative.
• If there is a fire, take the necessary steps.
• The unit can be brought back to operation by removing the plug from
the wall outlet, waiting for 30 seconds and putting the plug back.
F HELIOS Ventilateurs · Le Carré des Aviateurs · 157 av. Charles Floquet · 93155 Le Blanc Mesnil Cedex
GB HELIOS Ventilation Systems Ltd. · 5 Crown Gate · Wyncolls Road · Severalls Industrial Park ·
Colchester · Essex · CO4 9HZ