Haier HSU-09H03/(BP)1 Service Manual page 25

1.1.3.2 Compressor control under dehumidification running.
1.1.3.2.1 When running in normal status, control of compressor frequency:
Temperature difference (ｏ
C)
Maximum frequency (Hz)
1.1.3.2.2 When running in dehumidify mode, the setting air volume restricts frequency as follows:
Setting airflow
Middle
Low
1.1.3.2.3 When running in dehumidify mode, the outdoor ambient temperature restricts frequency as follows:
(only applying to the machine models with outdoor ambient temperature sensor).
Outdoor ambient temp. (ｏC)
ΔT≥26
ΔT < 26
1.1.4 Heating running (heat compensation temp. 4.67ｏC)
1.1.4.1 Air volume control under heating running.
When heating running starts, defrosting stops. When compressor restarts, it shall be warm start to prevent cold
wind.
Thermal conversion temperature:
42ｏC (undetermined)
35.1ｏC (undetermined)
27.2ｏC (undetermined)
18.3 ｏC (undetermined)
stop
Note:
For different machine type, the "undetermined" parameters is also different, here only take this example for illustration.
" * " Indicating that if unit maintains in this wind speed for more than 4 minutes, it then select higher speed.
When setting automatic wind speed, its velocity is related to the temperature difference (including compensation
temperature), see the following table for details:
Temperature difference (ｏC)
Wind speed
1.1.4.2 Compressor control under heating running
Domestic Air Conditioner
ΔT> 4.3
High frequency Mid. frequency
Maximum frequency (Hz)
90 Hz
52 Hz
Maximum frequency (Hz)
No limitation
60 Hz
Lower Low
ΔT> 4.7
High
25
4.3 ≥ΔT≥
1.3 ≥ΔT≥-1
1.3
Low frequency
* Select higher wind speed after 4 minutes
setting
4.7 ≥ΔT≥0.7
Middle
HSU-09H03/(BP)1
Model:
HSU-12H03/(BP)1
ΔT < -1
Compressor
stop
Low Lower stop
ΔT < 0.7
Low