Helios EcoVent Verso KWL 45 LE-RSB, Installation And Operating Instructions Manual

Page: 50 / 56

8 .0 Fault causes
20
Control Set KWL 45 STS-UP/HS
Installation and Operating Instructions
CHAPTER 8
FAUT CAUSES
Fault Causes Solution
KWL EC 45 does not
start
or
impeller does not
turn
(no longer turns)
Check mains power supply
Check connections according to wiring diagram
– Control voltage failure 12 V DC Replace switching power supply SNU / SNH
– Operating mode Supply air active Change operating mode
(target function no fault)
– Plug not connected to KWL EC 45 or
cable break
Check plug and control line for cable break if
necessary
– Ventilation stage 0 activated Change operating stage
Note external contact
– Impeller blocked Clear blockade, clean if necessary
Contact Helios customer services
– Motor defective Contact Helios customer services
– Controller defective Check connections according to wiring diagram
Contact Helios customer services
Vibrations – Contamination of impellers Clean
– Bearing damage Replace fan
Contact Helios customer services
Abnormal noises – Grinding impeller Clean impeller, replace fan if necessary
Contact Helios customer services
– Bearing damage Replace fan
Contact Helios customer services
– Mechanical damage Replace defective components
Contact Helios customer services
KWL EC 45 no longer
supplies the capacity – G3 - Filter and/or protection guard
contaminated Check G3 -filter and protection guard for contami-
nation and replace G3 - filter or clean protection
guard
– Design-inner panel is closed Open design–inner panel
– Ventilation stage not selected Increase ventilation stage
– Bearing damage Replace fan
Contact Helios customer services
– Heat accumulator contaminated Clean (see page 10)
EN