Lennox MPB036S4M

97
21. Single-Zone Outdoor Unit LED Locations
Single-zoneoutdoorunitsdisplayashcodesonthemainboard.Themainboardisaccessedthroughthetopoftheunit.
Indoorunitswilldisplaymoredetailederrorcodes.See“20.QuickReferenceGuide-ErrorCodes”onpage95forerror
codes.
TheseoutdoorunitsdonothaveaSW1spotcheckpushbuttonswitch.Diagnosticisperformedthroughaseriesofblue,
redandgreenLEDs.
NOTE: The control on all single-zone outdoor units is mounted with all LEDs down and cannot be seen unless the control
is removed.
Figure 64. Typical Location of Outdoor Unit LEDs