Lennox MWMB012S4-*L User Manual

132
Error Code: E4
Description: Indoor return air temperature sensor error.
General Note: Ifthevoltageislowerthan0.06Vorhigherthan4.94V,theLEDwilldisplaytheerror.
Temperaturesensor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.

Lennox MWMB012S4-*L Specifications

General

Brand	Lennox
Model	MWMB012S4-*L
Category	Air Conditioner
Language	English