Single-Zone Outdoor Unit Led Locations - Lennox MPA009S4S Service Manual

21. Single-Zone Outdoor Unit LED Locations

Single-zone outdoor units display flash 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
97