Troubleshooting
Problem Recommended Troubleshooting Steps
ERV/HRVunitnotrunning 1. Verifypolarizationofelectricalreceptacle.
2. Verifybreakerinelectricalbox.
3. Verifythattheexternalcontrolormodeselectorareactivated
tocallforventilation.
4. Unplugtheunitandverifythattheexternalcontrol(s) arewired
correctlytothewiringterminalblock.
Airistoodry 1. Increasehumiditylevelonthedehumidistat.
2. Switchventilationmodefromcontinuoustointermittent.
3. Installahumidifier.
Airtoohumid 1. Reducethehumiditylevelonthecontroller.
2. Makesurethattheclothesdryerisventedtothe outdoors.
3. Waitforoutsidetemperaturetochange.Forexample,itcanbe
veryhumidattimesinthesummer.
4. VerifybalancingoftheERV/HRVunit(seeBalancingStepson
page25).
LEDoncontrolpanelremains
green IftheLEDlightontheERV/HRVcontrolpanelremainsgreen,the
motorsdonotenergize,andthecontrolsdonotoperate. Thiscan
indicatethatthePolarizationinthemainACoutlet isinverted
CAUTION: Servicing the ERV/HRV unit with its electrical circuitry can cause personal
injury. Always make sure that power to the unit is disconnected prior to making any
connections. Failure to disconnect the power could result in electrical shock. Service
should only be performed by a qualied service technician.
ERV/HRVVentilationSystems69-2480EF—01 29