Specification Sheet
APPENDICES
Table 1. Troubleshooting Guide.
Symptom Cause Solution
Poor airflow Plugged outside hood 1/4 in. (6 mm) mesh.• Clean exterior hoods or vents•
Filters plugged.• Remove and clean filter.•
Core obstructed.• Remove and clean core.•
House grilles closed or blocked.• Check and open grilles.•
Dampers (if installed) are closed.• Open and adjust dampers•
Poor power supply at site.• Have electrician check supply voltage at house.•
Ductwork is restricting airflow.• Check duct installation.•
Improper speed control setting.• Increase speed of ventilator.•
Ventilator airflow improperly balanced.• Have contractor balance ventilator airflow.•
Supply air
feels cold
Poor location of supply grilles, airflow can •
irritate the occupant.
Locate grilles high on walls or under baseboard •
heaters; install ceiling-mounted diffuser or
grilles to avoid blowing directly on occupants
(example: over a sofa).
Outdoor temperature extremely cold.• Turn down ventilator supply speed.•
Use a small duct heater (1 kW) to temper the •
supply air.
Placement of furniture or closed doors is •
restricting movement of air in the home.
If supply air is ducted in furnace return, run •
furnace fan continuously to distribute ventilation
air comfortably.
Ventilator airflow can be incorrectly balanced.• Have a contractor balance ventilator airflow.•
Dehumidistat
is not
operating
Incorrect connection to external 24-volt control.•
Staple/nail is shorting out external low voltage.•
Check that correct wires were used.•
Check external wiring for a short.•
Check dehumidistat setting; it could be at Off.• Set dehumidistat at the desired setting.•
Dehumidistat is disabled when the outdoor •
temperature is above 60F for 24 hours.
Check the LED on the terminal block for long •
flash followed by a short flash.
TROUBLESHOOTING
HR150, 200; ER150, 200 Perfect Window™ Fresh Air Ventilation Systems 68-0171—12
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