Amana HRV-300D, HRV-150D, HRV-200D manual Troubleshooting

TROUBLESHOOTING

Problem

Causes

Solutions

Air is too dry	Dehumidistat control is set too low	Increase the desired level of humidity. Change ventilation mode from
		continuous mode to standby.
		Balance HRV
	HRV out of balance
Air is too humid	Dehumidistat control is set too high	Reduce the desired level of humidity. Combine this step with use of con-
		tinuous exchange mode.
	Sudden change in temperature	Wait until outside temperature stabilizes (winter). Heating will also
		improve situation.
	Storing too much wood for heating	Store a majority of your wood outside. Even dried, a cord of wood con-
		tains more than 20 gallons of water.
	Dryer vent exhaust is inside home	Arrange outside vent for dryer.
	Poor air circulating near windows	Open curtains or blinds. Bay or bow windows may require mechanical
		method.
	HRV out of balance	Balance HRV
	Well sealed basement door is closed	Open the door or install a grill on the door.
Persistent condensation	Improper adjustment of dehumidistat con-	Reduce the desired level of humidity. Combine this with the use of con-
on window	trol	tinuous exchange mode.
	HRV out of balance	Balance HRV
Poor Air Flows	-1/4” (6mm) mesh on the outside hoods	-Clean exterior hoods or vents
	is plugged	-Remove and clean filter
		-Remove and clean core
	-Filters plugged
		-Check and open grilles
	-Core obstructed
		-Have electrician check supply voltage at house
	-House grilles closed or blocked
		-Check duct installation
	-Dampers are closed if installed
		-Increase the speed of the HRV/ERV
	-Poor power supply at site
		-Have contractor balance HRV/ERV
	-Ductwork is restricting HRV/ERV
	-Improper speed control setting
	-HRV/ERV airflow improperly balanced
Supply air feels cold	-Poor location of supply grilles, the airflow	-Locate the grilles high on the walls or under the baseboards, install
		ceiling mounted diffuser or grilles so as not to directly spill the supply
	may irritate the occupant
		air on the occupant (eg. Over a sofa)
	-Outdoor temperature extremely cold
		-Turn down the HRV/ERV supply speed. A small duct heater (1kw)
		could be used to temper the supply air
		-Placement of furniture or closed doors is restricting the movement of
		air in the home
		-If supply air is ducted into furnace return, the furnace fan may need to
		run continuously to distribute ventilation air comfortably
HRV and / or Ducts	-HRV air flows are improperly	-Note: minimal frost build-up is expected on cores before unit initiates
Frosting up	balanced	defrost cycle functions
		-Have HVAC contractor balance the HRV
	-Malfunction of the HRV defrost
	system
Condensation or Ice	-Incomplete vapor barrier around	-Tape and seal all joints
Build Up in Insulated	insulated duct	-Tape any holes or tears made in the outer duct covering
Duct to the Outside	-A hole or tear in outer duct covering	-Ensure that the vapor barrier is completely sealed.

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