Lennox Mini-Split Service Manual / Page 127
Identifying fault codes and troubleshooting problems is most easily done from the indoor unit.
• Section 13.1 contains a quick reference table listing each unit’s digital display or flash code
• Section 13.2 contains troubleshooting information for 009/012 Single Zone outdoor units
• Single Zone outdoor units display limited flash codes on the main control board.
• Section 13.3 contains troubleshooting information for 018-048 Single Zone outdoor units
• Single Zone outdoor units display limited flash codes on the main control board.
• Section 13.4 contains troubleshooting information for all Indoor Units
• Wall-Mounted Indoor Units have digital displays on the front of the unit.
• All other indoor units have digital displays on either the unit front cover or inside the control box or flash
code displays on the main control board.
Section 13.5 contains troubleshooting information for all Multi-Zone outdoor units
• Multi-Zone outdoor units display a digital readout on the main control board.
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