12-6
CONTROL SYSTEM
SM XLFDCI 1-A.1 GB
Dry Mode
As long as room temperature is higher then the set point, indoor fan will work in low speed and
compressor will work between 0 and
MaxNLOADIF1C
Hz.
When the room temperature is lower than the set point, compressor will be switched OFF and
indoor fan will cycle 3 minutes OFF, 1 minute ON.
Protections
There are 5 protection codes.
Normal (Norm) – unit operate normally.
SXLF Rise (SR) – compressor frequency can not be raised but does not have to be decreased.
HzDown1 (D1) – Compressor frequency is reduced by 2 to 5 Hz per minute.
HzDown2 (D2) – Compressor frequency is reduced by 5 to 10 Hz per minute.
SXLF Compressor (SC) – Compressor is sXLFped.
Indoor Coil Defrost Protection
Min(ICT,ICTE)
Trend
Fast Increasing
Increasing
No Change
Decreasing Fast Decreasing
< -2
SC
SC
SC
SC
SC
[-2, 0)
D1
D1
D2
D2
D2
[0, 2)
SR
SR
D1
D2
D2
[2, 4)
SR
SR
SR
D1
D2
[4, 6)
Norm
Norm
SR
SR
D1
[6, 8]
Norm
Norm
Norm
SR
SR
> 8
Norm
Indoor Coil Overheating Protection
ICT
ICT Trend
Fast Decreasing Decreasing
No Change
Increasing
Fast Increasing
>62
SC
SC
SC
SC
SC
[60, 62)
D1
D1
D2
D2
D2
[55, 60)
SR
SR
D1
D2
D2
[52, 55)
SR
SR
SR
D1
D2
[48, 52)
Norm
Norm
SR
SR
D1
[45, 48)
Norm
Norm
Norm
SR
SR
I<45
Norm
Compressor Overheating Protection
Compressor Overheating Protection for GC 9 / 12
Compressor temperature can be in one of 5 control zones (4 in protection, and 1 normal),
according to the following chart.
CONTENTS
