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17. TROUBLESHOOTING
QUESTION / ITEM
DIAGNOSIS / SOLUTION
• HRV/ERV not running
• Verify breaker in main electrical panel
• Verify the HRV or ERV is in the ON position
• Verify the all wall controls switch on the HRV or ERV are activated to supply power to the unit
• Unplug HRV or ERV verify if the controller is wired correctly to the connection box on the side of the unit
• Verify main outlet polarization
• Air is too dry
• Increase the humidity level on the controller
• Reduce continuous airflow rate
• Switch ventilation mode from continuous to intermittent
• Humidifier recommended if heating source is a forced air system
• Air too humid
• Suggest continuous operation of HRV or ERV
• Reduce humidity level on dehumidistat
• Increase continuous airflow rate
• Insufficient ventilation, check capacity
• Internal source of moisture, e.g. heating wood store in basement, possible leaks or poor insulation R-value and or
dryer is venting in basement
• Vibration or noise
• Verify that vibration mounting straps, hanging chains or wall bracket is used for hanging the units.
• Verify that flexible duct connections are use between the HRV or ERV and the rigid duct.
• Verify that the motors are operating and are not obscured by any debris
• Insure motor moves freely with turning by hand.
• Cold air
• Misplaced supply outlets
• Defrost no operating correctly
• The HRV or ERV not properly balanced
• High airflow on furnace continuous mode
• Insure HRV or ERV is interlock when integrated with forced air system
• Contamination or Pollutants
• Insure proper clearance of ventilation hoods from source of contaminants
Refer to section 10. Outside Fresh Air and Exhaust Air Hoods.
• Condensation
• Verify that the HRV or ERV is level to insure proper drainage
• Verify that the duct connection are fix and secured with screws to the HRV or ERV.
• Verify the cold side duct connections are fully insulated and that vapor barrier is taped to insure a proper seal.
• Look for signs of crushed section, failing duct straps, puncture vapor barrier, missing insulation.
• Insure proper seal of vapor barrier to outside wall.
• Look for sign of water accumulation/leakage/dripping
• Verify that the drain connection is not kinked; the “P” trap is not to close to unit or obscured with debris.
