Lennox Mini-Split Service Manual / Page 125
Outdoor unit’s digital display tube
There is a digital display tube in outdoor PCB.
Digital display tube display function
In standby , the LED displays “- -”
In compressor operation, the LED display the running frequency,
In defrosting mode, The LED displays “dF” or alternative displays between running frequency and “dF”(each
displays 0.5s)
In compressor pre-heating, The LED displays “PH” or alternative displays between running frequency and
“PH”(each displays 0.5s)
During the oil return process, The LED displays “RO” or alternative displays between running frequency and
“RO”(each displays 0.5s)
In low ambient cooling mode, the LED displays “LC” or alternative displays between running frequency and
“LC”(each displays 0.5s)
In forced cooling mode, the LED displays “FC” or alternative displays between running frequency and
“FC”(each displays 0.5s)
When PFC module protection occurs three times within 15 minutes, the LED displays “E6” or alternative
displays between running frequency and “E6”(each displays 0.5s)
In protection or malfunction, the LED displays error code or protection code.
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