Lennox MPB018S4M - Page 135

135
Error Code: EE
Description: Water-levelalarmmalfunction.(ForM22A,M33A/BandMMDAunits)
General Note: Ifthesamplingvoltageisnot5V,theLEDwilldisplaythefailure.
Poweroff,thenrestarttheunit3minutes
later.Isitstilldisplayingtheerrorcode?
Ifthewater-levelswitchisinsertedwell?
Yes
No
No
Insertthewater-level
switchwell.
Ifthewater-levelswitchisbroken?
Replacethewaterpump,Ifmalfunctionis
still not solved.
ReplacetheindoormainPCB.
Yes
Replacethewater-level
switch.