37
F indoor unit room temperature (T
1
F)
F indoor unit evaporator temperature (T
2
F)
EXV open angle for F indoor unit
7.3.2 Outdoor Unit Digital Display
A digital display is featured on the outdoor PCB.
The LED displays different codes in the following situations:
Standby: “- -.”
Compressor operation: the running frequency.
Defrosting mode: “dF” or alternative displays between running frequency and
“dF” (ach appears for 0.5s.)
Compressor pre-heating: “PH” or alternative displays between running frequency
and “PH” (each appears for 0.5s.)
Oil return process: “RO” or alternative displays between running
frequency and “RO” (each appears for 0.5s.)
Low ambient cooling mode: “LC” or alternative displays between running
frequency and “LC” (each appears for 0.5s.)
Forced cooling mode: the LED displays “FC” or alternative displays between running frequency and
“FC” (each appears for 0.5s).
PFC module protection occurs three times within 15 minutes: “E6” or
alternates between displays of running frequency and “E6” (each appears for 0.5s.)
In protection or malfunction, the LED displays an error code or protection code.