Lennox MPB012S4S Service Manual

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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

Lennox MPB012S4S Specifications

General

Brand	Lennox
Model	MPB012S4S
Category	Air Conditioner
Language	English