10
Unit with inner panel –
KWL EC 45-160
Installation and Operating Instructions
6 .3 Fault causes
6 .4 Standstill and disposal
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Danger to life due to electric shock!
When dismantling, live parts can be exposed, which can result in electric shock if touched .
Before dismantling, isolate the fan from the mains power supply and protect against being switching on
again!
Parts and components of the fan, whose service life has expired, e.g. due to wear and tear, corrosion, mechanical
load, fatigue and/or other effects that cannot be directly discerned, must be disposed of expertly and properly after
disassembly in accordance with the national and international laws and regulations. The same also applies to auxiliary
materials in use. Such as oils and greases or other substances.
The intended and unintended further use of worn parts, e.g. impellers, rolling bearings, filters, etc. can result in danger
to persons, the environment as well as machines and systems. The corresponding operator guidelines applicable on-
site must be observed and used.
Fault
Causes
Solution
EC fan not turning
– Mains voltage 230 V failure
Check mains voltage
Check connection according to wiring diagram
– Control voltage 12 V DC failure
Replace switching power supply
– Operating mode Supply air active
Change operating mode
(please note installation and operating instructions
for controller)
– Connection plug not connected or
cable break
Check connection plug and check connection
cable for breakage, if necessary
– Ventilation level 0 activated
Change operating level; note external contact
– Impeller is blocked
Clear blockage, clean; contact Helios customer
service team, if necessary
– Motor is defective
Contact Helios customer service team
– Controller is defective
Check connection according to wiring diagram
Contact Helios customer service team
Vibrations
– Contamination of impeller
Clean impeller
– Bearing damage
Replace EC fan
Contact Helios customer service team
Abnormal noises
– Grinding impeller
Clean impeller, replace EC fan, if necessary
Contact Helios customer service team
– Bearing damage
Replace EC fan
Contact Helios customer service team
– Mechanical damage
Replace defective components
Contact Helios customer service team
Reduced
performance
– Filter and/or fan protection grille is
contaminated
Check filter and fan protection grille for contami-
nation and replace filter, if necessary, or clean fan
protection grille
– Inner panel is closed
Open inner panel
– Low ventilation level selected
Increase ventilation level
– Bearing damage
Replace EC fan
Contact Helios customer service team
– Heat accumulator is contaminated
Clean heat accumulator
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DANGER
EN
