Functions and control
The calculation of the actual output frequency: when there is no healthy airflow: F =F-ED-*×P×K When the
healthy airflow has been set: F =F-ED-*×P×K˄airflow speed˅×K˄healthy airflow˅ When refrigerating, it is
needed to satisfy ˢˉ˩INˉ< F<ˢˉ˩˝˴ˉWhen heating, it is needed to satisfy ˢˉ˩INˉr< F<
ˢˉ˩˝˴ˉr
5.2.2 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).
5.2.2.1 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 ou
tdoor
environment.
The temperature of the outdoor
air ˄Ta˅
The temperature of the outdoor
coil˄Te˅
Airflow speed
Ta≥30ć hgiH ---
26ć≤Ta<30ć deeps eht gnipeeK ---
24ć≤Ta<26ć muideM ---
23ć≤Ta<24ć deeps eht gnipeeK ---
10ć≤Ta<23ć woL ---
5ć≤Ta<10ć woL ---
Ta<5ć 51 ć woL eT>
51 ć potS eT>
5.2.2.2 The outdoor fan control when heating
The temperature of the outdoor air ˄Ta˅ deeps wolfriA
Ta≥22ć woL
19ć≤Ta<22ć deeps eht gnipeeK
16ć≤Ta<22ć muideM
14ć≤Ta<16ć deeps eht gnipeeK
Ta<14ć hgiH
5.2.3 The control of the outdoor electronic expansion valve˄EEV˅
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 5s, 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
Domestic air conditioner
25
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