enervent Fenix 120, Installation And Operation Instructions Manual, Page: 22 / 31

22
FAILURE SEARCH AND TROUBLE SHOOTING
SUPPLY AIR TOO COLD
Reason Action
* Supply air temperature set too low
Set higher value on the thermostat
* The exhaust fan has stopped Contact a service man
* The exhaust air filter is blocked Change the exhaust air filter
* Exhaust air valves settings incorrect Contact a service man
* Heat insulation of ducts inadequate Check the insulation thickness of the
supply and exhaust air ducts and
add insulation if needed.
REDUCED AIR FLOW
Reason Action
* Filters are blocked Change the filters
* Speed selector switch of the fans Select higher speed
has been turned down
* Blockage in the fresh air grille Clean the outer grille
* Fan wings dirty Clean the fans
INCREASED OPERATING SOUND LEVEL
Reason Action
* Filters blocked Change the filters
* Outer grilles are blocked Clean the outer grille
* Fan bearings faulty Change bearings / contact service
* Fan wings dirty Clean the fans