GE GES-NX2G25OUT, Service Manual

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Functions and control
1
7
Domestic air conditioner
7.1.2 The outdoor fan control (Exchange fan)
When the fan is changed among every airflow speed (including stop blowing), in order to avoid the
airflow speed from skipping frequently, it must be kept under each mode for over 30 seconds, and then
it can be changed to another mode (when refrigerating, the time is changed to 15 seconds).
7.1.2.1 The outdoor fan control when refrigerating or dehumidifying
After the compressor is started for 5 seconds, the outdoor fan is started at the medium speed at
first, after 30 seconds, it begins to control the airflow speed according to the temperature conditions of
the outdoor environment.
7.1.2.2 The outdoor fan control when heating
The temperature of the outdoor air (Ta) Airflow speed
Ta ≥ 22
℃
Low
19
℃
≤ Ta<22
℃
Keeping the speed
16
℃
≤ Ta<22
℃
Medium
14
℃
≤ Ta<16
℃
Keeping the speed
Ta<14 ℃
High
7.1.3 The control of the outdoor Electronic expansion valve (EEV)
(09K series have no this function)
In cooling mode, the EEV opening range is 90~480 steps. The EEV opening is 5 steps when unit is off.
In heating mode, the EEV opening range is 60~480 steps. The EEV opening is 45 steps when unit is
off.
After outdoor unit is off, the EEV opening keep the current on for 5 s, then open the EEV completely for
2 minutes, then become 5 steps (cooling) or 45 steps (heating).
The EEV opening will increase if SH (superheat degree) >0 while decrease if SH<0.
Adjust frequency:
If |SH|=0, 60s/ 1 step
If |SH|
≥
3,and
△
SH=0, 10s/ 1 step.
If 3
≥
|SH|
≥
0, 30s/ 1 step.
△
SH= current SH- last SH
SH= Ts (suction temp)-Tc1 (indoor coil temp)-Tsh (fixed data, depend on different models, -1~2)
The temperature of the
outdoor air
（
Ta
）
The temperature of the outdoor
coil
（
Te
）
Airflow speed
Ta ≥ 30 ℃
—— High
26
℃
≤ Ta<30
℃
—— Keeping the speed
24
℃
≤ Ta<26
℃
—— Medium
23
℃
≤ Ta<24
℃
—— Keeping the speed
10 ℃ ≤ Ta<23 ℃
—— Low
5
℃
≤ Ta<10
℃
—— Keeping the speed
Ta<5
℃
15
℃
≤ Te Low
15
℃
>Te Stop