Haier 2U40S2SM1FA, Service Manual, Page: 19 / 73

Refrigeration/dehumidification mode::
Serial No. Temperature scope Frequency limitation
1 Wh_c<16 Max_hz1 45 HZ
2 Wh_c<23 Max_hz2 52 HZ
3 Wh_c<29 Max_hz3 60 HZ
4 Wh_c<32 Max_hz4 67 HZ
5 Wh_c<40 Max_hz5 75 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:
Refrigeration/dehumidification:
Heating mode
< 0 < 2 < 3 < 4 ≥ 4
The percentage of
the rated frequency P 80% 90% 95 % 100% 110%
< 0 < 2 < 3 < 4 ≥ 4
The percentage of the
rated frequency P 80% 90% 98% 105 % 115%
The indoor set
airflow speed Breeze Low Medium High Strong Quiet Healthy
airflow
Ki
60 70% 85% 100% 108% 60% 60%
Functions and control
Domestic air conditioner
17
6 Wh_c<48 Max_hz4 71 HZ
7 Wh_c>48 Max_hz5 60 HZ
<1
85%
<1
85%
F
（
reference frequency
）
=∑Fi
（
reference frequency
）
Note - valid internal machine (starting and running in accordance with the state) to participate
in the calculation
Fi
（
reference frequency
）＝
Fei
（
Computed base frequency
）
*Kw
（
Outer ring temperature coefficient
（
External ring temperature on frequency limitation
section
））
*Pi
（
Temperature difference between the weight
）
*Ki
（
Wind speed weight
）
（
Note: the reference frequency Fi is rounded after calculation and no rounding is performed
；）
i= machine A, machine B...
Pi
Pi