Lennox MLA009S4S-1P - Page 137

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Error Code: F1
Description: OutdoorTemperatureSensorT4Error.
General Note: Ifthevoltageislowerthan0.06Vorhigherthan4.94V,theLEDwilldisplaytheerror.
Checktheconnectionsbetweentempera-
turesensorandPCB.Aretheconnec-
tionsgood?
Yes
No
No
Correcttheconnections
Checktheresistancevalueofthesensor
via Appendix 1 and Appendix 2.
Yes
Replaceindoororout-
doorPCB.
Isitnormal?
No
Replacethesensor.