Haier 2U14CS1ERA, Service Manual

Page: 27 / 116

2U14CS1ERA-SM Functions and control
24
Domestic Air Conditioner
Refrigeration/dehumidification mode::
Serial No. Temperature scope Frequency limitation
1 Twh ̰ 16 Max_hz1 34HZ
2 16<Twh
̰
24 Max_hz2 40 HZ
3 24<Twh
̰
32 Max_hz3 62 HZ
4 32<Twh ̰ 44 Max_hz4 68 HZ
5 Twh>44 Max_hz5 40 HZ
Remarks: the above are not only the maximum frequency limitations of the complete appliance
which are affected by the environment, but also the maximum ability limitation of the system.
When the starting ability is not the maximum, its maximum frequency limitation is calculated by
the following equations:
The frequency limitation which is affected by the temperature and under the condition of actual
ability
˙
the actural running system ability*the maximum frequency which is limited by the
temperature and under the condition of maximum ability/the maximum designing ability of the
system

T=
ě˄
Ti*Pi
˅
/
ě
Pi (

Ti=|Tst_i-Tnh_i the indoor environment temperature| ;Pi
˙
i the
ability of the indoor unit)
Refrigeration/dehumidification:
Heating mode
˖
K=
ě
Ki/the number of running machines
The calculation of the actual output frequency: when there is no healthy airflow: F =F-ED-*
h
P
h
K
When the healthy airflow has been set: F =F-ED-*
h
P
h
K
˄
airflow speed
˅h
K
˄
healthy airflow
˅
When refrigerating, it is needed to satisfy
ˢˉ˩
IN
ˉ̀
< F<
ˢˉ˩˝˴ˉ̀
When heating, it is needed to satisfy
ˢˉ˩
IN
ˉ
r< F<
ˢˉ˩˝˴ˉ
r
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

T <1
˙
1
˙
2
˙
3 >=4
The percentage of
the rated frequency P
50% 70% 100% 120% 140%

T <1
˙
1
˙
2
˙
3 >=4
The percentage of the
rated frequency P
50% 70% 100% 130% 180%
The indoor set
airflow speed
Breeze Low Medium High Strong Quiet Healthy
airflow
The percentage
of the rated
frequency Ki
70 ˁ 80% 90% 100% 120% 70% 70%