Wiring Diagrams
22
Domestic Air Conditioner
white—the background light turns to white—the background light is fully lighted for 0.5 second—LED
screen lights for 0.5 second— the step-in motor fully output for 0.5 second—then the motor doesn’t
output for 0.5 second—the motor fully output again for 0.5 second. The test program finishes.
5.1.20 Time cutting function:
connect the test program terminal on the mainboard after connecting the system to the power circuit.
The CPU of the main control will be 60 times faster.
5.2 The control system of outdoor unit
5.2.1˖The operation frequency of outdoor unit and its control
5.2.1.1˖The operation frequency control of compressor
The operation frequency scope of compressor˖
Mode Minimun operation frequency Maximun operation frequency
Heating 36Hz 90Hz
Refrigeration 36 Hz 80Hz
5.2.1.2˖The starting of compressor
When the compressor is started for the first time, it must be kept under the conditions of
58Hz,88Hz for 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)ˈthen 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.
5.2.1.3˖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
5.2.1.4˖The calculation of the compressor’s frequency
1˅ǃThe minimum/maximum frequency limitation
AˊWhile refrigerating: ˢˉ˩˝˴ˉ is the maximum operation frequency of the compressor;
ˢˉ˩INˉ is the minimum operation frequency of the compressor.
BˊWhile heating: ˢˉ˩˝˴ˉ is the maximum operation frequency of the compressor; ˢˉ
˩INˉis the minimum operation frequency of the compressor.
1˅ǃThe frequency limitation which is affected by the environment temperature.
Heating mode:
Serial No. Temperature scope Frequency limitation
1 Wh_c<-12 Max_hz8 90 HZ
2 Wh_c<-8 Max_hz7 90HZ
3 Wh_c<-2 Max_hz4 90 HZ
4 Wh_c<5 Max_hz5 85HZ
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