Troubleshooting
Problem Recommended Troubleshooting Steps
ERV/HRVunitnotrunning 1. Verifypolarizationofelectricalreceptacle.
2. Verifybreakerinelectricalbox.
3. Verifythattheexternalcontrolormodeselectorareactivated
tocallforventilation.
4. Unplugtheunitandverifythattheexternalcontrol(s)arewired
correctlytothewiringterminalblock.
Airistoodry 1. Increasehumiditylevelonthedehumidistat.
2. Switchventilationmodefromcontinuoustointermittent.
3. Installahumidifier.
Airtoohumid 1. Reducethehumiditylevelonthecontroller.
2. Makesurethattheclothesdryerisventedtotheoutdoors.
3. Waitforoutsidetemperaturetochange.Forexample,itcanbe
veryhumidattimesinthesummer.
4. VerifybalancingoftheERV/HRVunit(seeBalancingStepson
page25).
LEDoncontrolpanelremains
green
IftheLEDlightontheERV/HRVcontrolpanelremainsgreen,the
motorsdonotenergize,andthecontrolsdonotoperate.Thiscan
indicatethatthePolarizationinthemainACoutletisinverted
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 qualied service technician.
ERV/HRVVentilationSystems69-2480EF—01 29