Haier 2U14CS4ERA, Service Manual

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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.
Remarks: Ta:The temperature of the outdoor air; Te: The temperature of the outdoor coil.
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
Remarks: Ta:The temperature of the outdoor air; Te: The temperature of the outdoor coil.
7.1.3 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;
When the outdoor unit is shut down, the valve is opened completely for 2 minutes, and then
begin initialization.
The scope of refrigerationg valve 90-----480 steps
The scope of heating valve
80-----480 steps
The valves are adjusted according to the degree of superheat SHa SHa.
7.1.4 Four way control
For the details of Defrost four-way valve control, see the Defrost process.
Four way working in other ways:
Under the mode of heating, open the four-way valve, when the compressor is not started or
changed to non-heating mode, make sure the compressor is stoped for 2 minutes, and then
close the four-way valve.
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
7.1.2.1 The outdoor fan control when refrigerating or dehumidifying
7.1.2.2 The outdoor fan control when heating
Functions and Control
Domestic air conditioner
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