Fantech Fit 120H Installation Manual

18fantechTroubleshootingProblem Causes SolutionsAir is too dry Dehumidistat control is set too low Increase the desired level of humidity. Change ventilation mode fromcontinuous mode to standby.HRV out of balance Have contractor balance HRV airflowsAir is too humid Dehumidistat control is set too high Reduce the desired level of humidity. Combine this with the use of continuousexchange mode.Sudden change in temperature Wait until outside temperature stabilizes (winter). Heating will also improvesituation.Storing too much wood for heating Store a majority of your wood outside. Even dried, a cord of wood containsmore than 20 gallons of water.Dryer vent exhaust is inside home Make sure the dryer vent is exhausting outside.Poor air circulation near windows Open curtains or blinds.HRV out of balance Have contractor balance HRV airflowsWell sealed basement door is closed Open the door or install a grill on the door.Failed damper system may be stuck in recirculationmodeCheck defrost damper. If damper is always blocking incoming fresh air, havecontractor verify damper system.Persistent condensationon windowImproper adjustment of dehumidistat control Reduce the desired level of humidity. Combine this step with use of continuousexchange mode.HRV out of balance Have contractor balance HRVPoor air circulation near windows Open curtains or blinds.Poor Air Flows 1/4" (6mm) mesh on the outside hoods is plugged Clean exterior hoods or ventsFilters plugged Remove and clean filterCore obstructed Remove and clean coreIndoor grilles closed or blocked Check and open grillesInadequate power supply at site Have electrician check supply voltageDuctwork is restricting airflow Check duct installationImproper speed control setting Increase the speed of the HRV (i.e. change unit control from REDUCED to NORMALspeed)HRV airflow improperly balanced Have contractor balance HRV airflowsDucting has fallen down or been disconnected from HRV Have contractor reconnect ductingSupply air feels cold Poor location of supply grilles, the airflow may irritatethe occupantLocate the grilles high on the walls or under the baseboards, install ceilingmounted diffuser or grilles so as not to directly spill the supply air on theoccupant (eg. Over a sofa)Turn down the HRV supply speed. A small duct heater (1kw) could be used totemper the supply airPlacement of furniture or closed doors is restricting the movement of air inthe homeOutdoor temperature extremely cold If supply air is ducted into furnace return, the furnace fan may need to runcontinuously to distribute ventilation air comfortablyHRV and/or Ducts frosting up HRV air flows are improperly balanced Have HVAC contractor balance the HRV airflowsMalfunction of the HRV defrost system Note: minimal frost build-up is expected on the core before unit initiatesdefrost cycle functionsCondensation or Ice Build Up inInsulated Duct to the OutsideIncomplete vapor barrier around insulated duct Tape and seal all jointsA hole or tear in outer duct covering Tape any holes or tears made in the outer duct coveringEnsure that the vapor barrier is completely sealed.LED is flashing Everything is in good operationsLED is not flashing No Power is being transmitted to the Control Board Make sure unit is plugged.Transformer may need replacing.Note: It is best to get the unit checked by a certified HVAC Contractor/Technician.