6 .3 Fault causes
6 .4 Standstill and disposal
WARNING
When dismantling, live parts can be exposed, which can result in electric shock if touched . Before dismant-
ling, isolate the unit 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.
m
WARNING
11
Unit
KWL EC 45
Installation and operating instructions
Error/fault
Causes
Troubleshooting
KWL EC 45 does not
start
or
impeller does not turn
(no longer turns)
– Mains power supply failure 230 V
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 neces-
sary
– 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
