Functions And Control - Haier 1U50JECFRA-3 Service Manual

7. Functions and control

7.1 Main functions and control specification
7.1.1 The operation frequency of outdoor unit and its control
7.1.1.1 The operation frequency control of compressor
The operation frequency scope of compressor
Mode
Heating 18K/24K
Refrigeration 18K/24K
7.1.1.2 The starting of compressor
When the compressor is started for the first time, it must be kept under the conditions of
38Hz,58Hz,88Hz for 30second,one minute, one minute (the overheating protection of the outdoor unit
air-blowing temperature, immediately decrease the frequency when the compressor is overflowing and
releasing the pressure) then it can be operated towards the target frequency. When the machine runs
normally, there's no such process. After starting the compressor for operation, the compressor should
run according to the calculated frequency, and every determined frequency for protection should be
prior to the calculated frequency.
7.1.1.3 The speeds of increasing or decreasing the frequency of the compressor
The speed of increasing or decreasing the frequency rapidly 1 -----------1HZ/second
The speed of increasing or decreasing the frequency slowly 2 -----------1HZ/10seconds
7.1.1.4 The calculation of the compressor's frequency
Refrigeration/dehumidification mode:
Heating mode:
(Nh_c=indoor
environment temperature
1 The minimum/maximum frequency limitation
A While refrigerating: F-MAX-r is the maximum operation frequency of the compressor; F-MIN-r is the
minimum operation frequency of the compressor.
B While heating: F-MAX-d is the maximum operation frequency of the compressor; F-MIN-d is the
minimum operation frequency of the compressor.
2 The frequency limitation which is affected by the environment temperature.
(Wh_c= environment temperature)
Heating mode:
Serial No.
Minimum operation frequency
24 Hz /20Hz
20 Hz /20Hz
Pn=(Nh_c-
Pn=(Nh_c-
Pn=(S_c
Pn=(S_c
Temperature scope
1 Wh_c<-12
2 Wh_c<-8
Maximum operation frequency
103 Hz /100Hz
85 Hz /85Hz
S_c)*10 50 outdoor environment control
S_c) *10 50
-Nh_c)
*10 60
-Nh_c)
*10 60
S_c=setting temperature)
Frequency limitation 18K/24K
Max_hz1
Max_hz2
15
Functions and control
PID control
outdoor environment control
PID control
103HZ/87 HZ
103HZ/87 HZ
Domestic air conditioner