Haier Z/N-Series, Service Manual

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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 IN < F<
When heating, it is needed to satisfy IN r< F< r
7.1.4 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).
7.1.4.1 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.
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
7.1.5 The control of the outdoor electronic expansion valve
When starting the compressor: the opening size of the valve must be guaranteed to have entered
into the standard opening size, and then the compressor can be started.
When refrigeration is in vain (the machine is shut down or is in the state of retrograde operation),
the opening size of the expansion valve of the indoor unit is 5 steps;
When heating is in vain, the opening size of the expansion valve of the indoor unit is 55 steps;
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
5 Ta<23
Low
Ta<5 15 Te Low
15 >Te Stop
7.1.4.2
Functions and control
Domestic air conditioner
20